原田鉄工 List of Products and Services

- It is necessary to thoroughly remove any oil or dirt adhered to the surface. If the surface is not cleaned using organic solvents or detergents, the paint will not adhere properly and will peel off, so this should be done carefully. Additionally, it must be thoroughly dried after cleaning. - The smooth surface of aluminum needs to be polished to change it into a surface that allows for better paint adhesion. By polishing, fine scratches are created, allowing the paint to penetrate into the scratches and adhere firmly to the aluminum. This process is also crucial for removing surface oxides, significantly affecting the outcome of paint adhesion. - If a specialized paint with good adhesion to aluminum is not used, there is a possibility that it will easily peel off. In environments with significant temperature changes, using paint with insulation and heat shielding properties can prevent or reduce paint peeling due to thermal expansion. - After completing the specialized primer, apply an intermediate coat and a top coat suitable for the usage environment. Follow the appropriate drying times specified by the paint manufacturer, and confirm that the paint has fully cured before applying additional layers. When painting, it is necessary to ensure that the paint film has a uniform thickness. An uneven paint film thickness can lead to areas that are prone to peeling, so caution is advised.

• Rust Inhibitor
• Plastering and painting work

After surface treatment with grit blasting, three layers are applied in the order of epoxy and then polyurethane. ◎ Blasting (shot blasting/grit blasting/sand blasting/first type of scraping, English: blast) Compressed air at high pressure is injected together with particles called abrasives, colliding with the product to remove dirt, grime, and paint from the surface. ◎ Epoxy resin paint (English: epoxy resin) A general term for synthetic resin paint using epoxy resin. It has excellent rust prevention and adhesion properties, making it the mainstream for primer paint. However, it is weak against ultraviolet rays and may discolor, so it is common to apply a topcoat. ◎ Polyurethane resin paint (urethane resin paint, English: polyurethane resin) Polyurethane paint is made by mixing polyol resin as the main agent with an isocyanate hardener. It has excellent weather resistance and possesses gloss and beautiful luster, making it suitable for use as a topcoat.

• Rust Inhibitor
• Special Construction Method
• paint

Your magnesium products may experience paint bubbling or shrinkage. Therefore, we used sandblasting to minimize deformation and performed paint stripping. Please understand that we cannot accommodate baked coatings, and we shipped the products after paint stripping. The construction period is one working day, but stripping by blasting is also possible for other metals, thick film coatings, rubber, and plating. Our company is confident in our quality and speed, and we can deliver products that ensure high customer satisfaction. Harada Iron Works Hiroshima Official Link

• Special Construction Method
• Rust Inhibitor
• paint

Surface Preparation Standards: Types 1-3 Grinding, Blast, Power Tools, Hand Tools There are standards for surface preparation, categorized into Types 1-3 grinding. Type 1 grinding is the highest level, with a rust removal rate of over 99% achieved through blasting (SSPC SP-10, ISO Sa3). Type 2 grinding uses power tools, while Type 3 grinding involves hand tools. Each type of grinding has a specific rust removal rate, and the appropriate standard is selected based on the condition of the surface. ◎ Grit Blast (Blast/Type 1 Grinding in English: Grit blast) One method of surface treatment (grinding). Grinding is categorized from Type 1 to Type 4, and blasting serves as the surface preparation for the highest grade, Type 1 grinding. ◎ Sand Blast (Blast/Type 1 Grinding in English: Sand blast) One method of surface treatment (grinding). Grinding is categorized from Type 1 to Type 4, and blasting serves as the surface preparation for the highest grade, Type 1 grinding. Harada Ironworks Hiroshima Official Link

• Special Construction Method
• Rust Inhibitor
• paint

This product was manufactured in-house, handling all processes from material procurement, can fabrication, temporary assembly, hot-dip galvanizing, blasting, to final painting. Different specifications were adopted for the main girder and the handrail, with the handrail receiving a plating treatment. The blasting process was carried out to prepare the base material, removing debris and paint from the surface. In the painting process, multiple layers of paint were applied for rust prevention and aesthetic purposes. The overall construction period took about 1.5 months, resulting in a high-quality product.

• Special Construction Method
• paint
• Rust Inhibitor

Rotational Feast: The fan (Impeller/Runner) is a component that rotates due to the collision of liquids or gases. Vibrant Shine: Grit blasting is a surface treatment method that uses high-pressure air and abrasive materials to remove dirt, grime, and paint. It is classified as the highest grade of first-class surface preparation. Product Information: φ700×150 Grit blasting (SSPC SP-10) was used for surface preparation, and the work was carried out under the skilled eye of artisans. Even with complex shapes, perfect surface preparation was achieved through the artisans' techniques. It has been transformed into something remarkably beautiful! The construction period was one working day, but same-day service is possible depending on the order volume. Please consult with us. Harada Ironworks Hiroshima Official Link

• paint
• Special Construction Method
• Rust Inhibitor

Gold varnish is a temporary rust preventive, but it needs to be removed during painting. It is removed together with the scale using blasting. We also filmed a video during the construction, but caution is necessary. ◎ Grit blast One of the surface treatment methods (cleaning). There are four grades of cleaning, from first to fourth, and blasting is the substrate treatment of the highest grade, which is first-grade cleaning. ◎ Blast By spraying compressed air at high pressure together with particles called abrasives and colliding them with the product, it removes dirt, grime, and paint from the surface. ◎ Gold varnish A type of rust preventive treatment applied to the surface to prevent metal corrosion. However, its long-term rust prevention effect is weak, so it is used as a temporary rust preventive oil. Harada Iron Works Hiroshima Official Link

• Rust Inhibitor
• Special Construction Method
• paint

Based on the customer's request, we applied a rust-proof paint that does not contain lead or chromium after the surface treatment of the frame. We prepared the surface using degreasing treatment and sandpaper without blasting. Using an airless spray, we were able to create a uniform paint film. The construction period was two days, and since there was no specification for film thickness, we ensured a standard thickness of 35µm. Harada Iron Works is capable of providing high-quality painting according to customer requirements. Please consider us when you are thinking about painting. Harada Iron Works Hiroshima Official Link

• Rust Inhibitor
• Special Construction Method
• paint

Delicate refinement: Due to the large number of tapped holes and the constraints of the masking budget and construction period, sandblasting will be performed to minimize damage to the taps. (All tapped holes, screws, and machined surfaces must be masked; otherwise, the surface will be eroded by blasting and become unusable, which is not acceptable.) Although there were many tapped holes that could not be used even after sandblasting, it was decided to re-tap the screws using the taps. Although not shown in the video, there were many accompanying parts, so it was good that the customer was satisfied with both quality and delivery time. [Product Information] 1700×2400×200 [Surface Preparation] Sandblasting SSPC SP-10 [Construction Period] 2 days after arrival Harada Iron Works Hiroshima Official Link

• Rust Inhibitor
• Special Construction Method
• paint

Due to deterioration over time, if the motor has rusted and the paint has peeled off, surface preparation will be carried out using grit blasting. Due to its complex shape, the grit blasting, which has strong grinding power, took some time, but after the adjustment, the customer plans to repaint it. Even products that have aged and become worn out can regain the shine of a new item through proper surface preparation and repainting. [Product Information] φ600×800 [Surface Preparation] Grit Blast SSPC SP-10 Harada Iron Works Hiroshima Official Link

• Rust Inhibitor
• Special Construction Method
• paint

◎Deoxidation Treatment This is a cleaning process that uses organic solvents to remove dirt and oil from the surface. If oil remains, it may cause the paint to repel or adhere inadequately. ◎Airless Painting This is a method of applying paint without using air. Liquid paint is pressurized with a pump, atomized, and sprayed in a mist. It is suitable for large products as it forms a thick paint film. ◎Lead-Free, Chrome-Free Anti-Corrosion Paint This is an anti-corrosion paint developed as an environmentally friendly alternative, free from lead and chrome that were previously used. ◎Long Oil Phthalic Resin Paint This is a type of alkyd resin that contains a high amount of oil and has excellent workability. It is classified into three types based on oil content: short oil, medium oil, and long oil. Since the painting specifications for the exterior and interior are different, masking was performed during the work. Harada Ironworks Hiroshima Official Link

• Rust Inhibitor
• Special Construction Method
• paint

The product assembled based on the customer's drawings is a shot blast machine (conveyor type). (It is not our own equipment.) This machine uses steel balls and is capable of automatic operation, making it efficient and cost-effective. However, there are limitations on the shapes that can be processed, and the projection power is somewhat weak. The construction period took about two months, but we are also manufacturing various other products. Harada Iron Works Hiroshima Official Link

• Rust Inhibitor
• Special Construction Method
• paint

At the request of a rental company, we thoroughly cleaned a bucket stained with concrete using blasting. The bucket was dirty due to concrete and an old paint film, and its appearance had deteriorated. As per the customer's request, we used grit blasting to completely strip the surface of the bucket. This removed all the concrete and old paint film, restoring the bucket to a like-new condition. After that, we performed repainting to enhance durability and aesthetics. We received positive feedback from the customer, who was pleased that the bucket could be put back to use. Our company utilizes grit blasting for the removal of various materials and coatings, providing high-quality surface treatment. Harada Ironworks Hiroshima Official Link

• Rust Inhibitor
• Special Construction Method
• paint

Glass bead blasting, as the name suggests, uses glass spheres as an abrasive material, allowing for a clean surface while minimizing wear on the product itself. It is used not only on metal but also for decorative purposes on wood and glass products. ◎ Spanner (Wrench) Both spanner and wrench refer to tools used to rotate and tighten bolts and nuts. Spanner is British English, while wrench is American English, and it seems to have been introduced to Japan in that way. In Japan, it is common to refer to tools with an open end and fixed width as spanners, while other types are often called wrenches. ◎ Glass beads (Blast/Type 1 Keren) This is one method of surface treatment (Keren). Keren is classified into types 1 to 4, and blasting is the substrate treatment of the highest grade, Type 1 Keren. It is called glass bead blasting because it uses "glass beads" as the abrasive material. Harada Ironworks Hiroshima Official Link

• Rust Inhibitor
• Special Construction Method
• paint

There are various methods for processing metal. For example, there are many processing methods such as welding, cutting, forging, bending, and grinding. This refers to the materials used during the grinding process. Grinding processing is a method that involves striking countless grinding materials against the target product to shave off the surface. By selecting the appropriate projection method and grinding material, blasting can perform grinding processing on many types of materials. The materials for grinding can include metal, ceramics, glass, resin, dry ice, and come in various shapes such as spherical, polygonal, and powdery. Below, we introduce three types of grinding materials used by our company. Harada Iron Works Co., Ltd. TEL: 082-232-2445 FAX: 082-293-0286 Contact: Tao Mobile: 090-3742-9768 Email: bousei@harada-tekkou.co.jp Harada Iron Works Hiroshima Official Link

• Rust Inhibitor
• Special Construction Method
• paint

We will perform surface treatment of SS400 plates using blasting. To improve the adhesion of the rubber that will be attached to the surface of the plates, we will conduct surface treatment with grit blasting. All tap holes are protected to prevent damage. ◎ SS400 (formerly SS41) This is the most widely distributed and representative material among general structural rolled steel. "SS" stands for Steel Structure, and "400" represents the minimum guaranteed tensile strength. Due to its high distribution, it is cheaper compared to other metal materials and is available in a wide variety of types and sizes. ◎ Tap This refers to a tool for cutting internal threads. The side where the screw goes in is called the internal thread, and the side that inserts is called the external thread. It has cutting edges and creates internal threads by rotating it while inserting it into a hole. A hole that has internal threads cut into it is called a "tap hole." ◎ Masking This means to cover or wrap. When performing blasting or painting, masking tape or caps are used to cover areas that should not be treated, protecting them from the process. Harada Iron Works Hiroshima Official Link

• Rust Inhibitor
• Special Construction Method
• paint

◎Mortar Mixer A machine that creates mortar, a mixture of cement, water, and sand. It performs mixing by rotating blades for stirring. ◎Noro A mixture of cement and lime dissolved in water. "Noro" = cement + water, "mortar" = noro + sand, "concrete" = mortar + gravel. ◎Surface Preparation A type of substrate treatment also called "keren," which is a pre-treatment for painting that makes the surface more suitable for painting. Surface preparation removes rust, dirt, and degraded paint films, and the formed irregularities greatly improve the adhesion of the paint. ◎Blast (Shot Blast/Type 1 Keren) By spraying compressed air at high pressure along with particles called abrasive materials, it removes dirt, grime, and paint from the surface by impacting the product. This is a request from a leasing company. They wanted to maintain the returned product and inquired whether it was possible to remove noro and paint using blasting. They mentioned that they would repaint it nicely to increase the product's value when renting. Everything was stripped away with grit blasting, and it became remarkably clean! Harada Iron Works Hiroshima Official Link

• Rust Inhibitor
• Special Construction Method
• paint

The spray gun, which is essential on painting sites, comes in two main types: air spray and airless spray. This time, I would like to introduce the airless spray type. For more details, please refer to the PDF download below. For anything related to blasting and painting, please leave it to us. Harada Ironworks Co., Ltd. TEL: 082-232-2445 FAX: 082-293-0286 Contact: Tao Mobile: 090-3742-9768 Email: bousei@harada-tekkou.co.jp Harada Ironworks Hiroshima Official Link

• Rust Inhibitor
• Special Construction Method
• paint

Welding is essential in the can manufacturing and assembly field. This time, I would like to introduce TIG welding. For more details, please refer to the PDF download below. For anything related to blasting and painting, please leave it to us. Harada Iron Works Co., Ltd. TEL: 082-232-2445 FAX: 082-293-0286 Contact: Tao Mobile: 090-3742-9768 Email: bousei@harada-tekkou.co.jp Harada Iron Works Hiroshima Official Link

• Rust Inhibitor
• Special Construction Method
• paint

Welding is essential in the can manufacturing and assembly field. This time, I would like to introduce arc welding. For more details, please refer to the PDF download below. For anything related to blasting and painting, please leave it to us. Harada Iron Works Co., Ltd. TEL: 082-232-2445 FAX: 082-293-0286 Contact: Tao Mobile: 090-3742-9768 Email: bousei@harada-tekkou.co.jp Harada Iron Works Hiroshima Official Link

• Rust Inhibitor
• Special Construction Method
• paint

The spray gun is essential on painting sites, and there are two main types: airless spray and air spray. This time, I would like to introduce the air spray type. For more details, please refer to the PDF download below. For anything related to blasting and painting, please leave it to us. Harada Ironworks Co., Ltd. TEL: 082-232-2445 FAX: 082-293-0286 Contact: Tao Mobile: 090-3742-9768 Email: bousei@harada-tekkou.co.jp Harada Ironworks Hiroshima Official Link

• Rust Inhibitor
• Special Construction Method
• paint

Welding is essential in the can manufacturing and assembly field. This time, I would like to introduce MIG welding. For more details, please refer to the PDF download below. For anything related to blasting and painting, please leave it to us. Harada Iron Works Co., Ltd. TEL: 082-232-2445 FAX: 082-293-0286 Contact: Tao Mobile: 090-3742-9768 Email: bousei@harada-tekkou.co.jp Harada Iron Works Hiroshima Official Link

• Rust Inhibitor
• Special Construction Method
• paint

Blasting is a type of surface treatment that creates various sizes of unevenness on the surface of the material. It results in a matte finish that suppresses gloss, so it is surprisingly applied to products that are quite familiar to us. For more details, please refer to the PDF download below. For anything related to blasting and painting, please leave it to us. Harada Ironworks Co., Ltd. TEL: 082-232-2445 FAX: 082-293-0286 Contact: Tao Mobile: 090-3742-9768 Email: bousei@harada-tekkou.co.jp Harada Ironworks Hiroshima Official Link

• Rust Inhibitor
• Special Construction Method
• paint

Blasting is a processing method that involves colliding abrasive materials with the target object. It can be broadly divided into two types: mechanical blasting and air blasting. For more details, please refer to the PDF download below. For anything related to blasting and painting, please leave it to us. Harada Iron Works Co., Ltd. TEL: 082-232-2445 FAX: 082-293-0286 Contact: Tao Mobile: 090-3742-9768 Email: bousei@harada-tekkou.co.jp Harada Iron Works Hiroshima Official Link

• Rust Inhibitor
• Special Construction Method
• paint

For can manufacturing, blasting, and painting, come to Harada Iron Works! Founded in Kannon, Hiroshima Prefecture, 80 years ago. With the skills and know-how honed over many years of experience, we are committed to providing even greater "high added value" products. We do not handle mass-produced items much; instead, we create products tailored to our customers' needs, such as prototypes and specialized equipment and jigs. 【Our Strengths】 1. Reliable technical skills cultivated over 80 years of establishment. 2. We help shorten delivery times and reduce total costs by providing a consistent production service from material procurement to painting and installation to meet various needs. 3. One of the largest blasting facilities in the Chugoku region (grit blast, sand blast). 4. With a site area of 3,700 square meters and a painting area of 650 square meters, we can accommodate all kinds of requests. 5. Convenient access in Kannon, Hiroshima City. For blasting and painting, leave it to us. Harada Iron Works Co., Ltd. TEL: 082-232-2445 FAX: 082-293-0286 Contact: Tao Mobile: 090-3742-9768 Email: bousei@harada-tekkou.co.jp Harada Iron Works Hiroshima Official Link

• Rust Inhibitor
• Special Construction Method
• paint

There is a request to remove paint and rust from the jet fan using blasting for regular maintenance. For more details, please refer to the PDF download below. You can trust us with blasting and painting. Harada Ironworks Co., Ltd. TEL: 082-232-2445 FAX: 082-293-0286 Contact: Tao Mobile: 090-3742-9768 Email: bousei@harada-tekkou.co.jp Harada Ironworks Hiroshima Official Link

• Rust Inhibitor
• paint
• Special Construction Method

There are various types of processing. This time, I would like to explain finishing processes. For more details, please refer to the PDF download below. For anything related to blasting and painting, please leave it to us. Harada Ironworks Co., Ltd. TEL: 082-232-2445 FAX: 082-293-0286 Contact: Tao Mobile: 090-3742-9768 Email: bousei@harada-tekkou.co.jp Harada Ironworks Hiroshima Official Link

• Bridge Materials
• Tunnel Materials
• River construction

There are various types of processing. This time, I would like to explain hole processing (tapping and reaming). For more details, please refer to the PDF download below. For anything related to blasting and painting, please leave it to us. Harada Iron Works Co., Ltd. TEL: 082-232-2445 FAX: 082-293-0286 Contact: Tao Mobile: 090-3742-9768 Email: bousei@harada-tekkou.co.jp Harada Iron Works Hiroshima Official Link

• Rust Inhibitor
• Steel construction
• Plastering and painting work

There are various types of processing. This time, I would like to explain lathe processing. For more details, please refer to the PDF download below. Please leave the blasting and painting to us. Harada Iron Works Co., Ltd. TEL: 082-232-2445 FAX: 082-293-0286 Person in charge: Tao Mobile: 090-3742-9768 Email: bousei@harada-tekkou.co.jp Harada Iron Works Hiroshima Official Link

• Rust Inhibitor
• paint
• Special Construction Method

There are various types of processing. This time, I would like to explain cutting processing. For more details, please refer to the PDF download below. For anything related to blasting and painting, please leave it to us. Harada Iron Works Co., Ltd. TEL: 082-232-2445 FAX: 082-293-0286 Contact: Tao Mobile: 090-3742-9768 Email: bousei@harada-tekkou.co.jp Harada Iron Works Hiroshima Official Link

• Special Construction Method
• paint
• Rust Inhibitor

There are various types of processing. This time, I would like to explain shear processing. For more details, please refer to the PDF download below. For anything related to blasting and painting, please leave it to us. Harada Iron Works Co., Ltd. TEL: 082-232-2445 FAX: 082-293-0286 Contact: Tao Mobile: 090-3742-9768 Email: bousei@harada-tekkou.co.jp Harada Iron Works Hiroshima Official Link

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• paint

If you have any requests for machine painting or metal painting, please feel free to consult us about anything. We have been engaged in machine and metal painting for 80 years. With our reliable technology and extensive experience, we will beautifully finish your products. If you are unsure about which paint to use or have any specifications you are struggling with, we are available to help you select the appropriate painting specifications. Additionally, we have a large painting space (650 square meters) and a crane with a maximum capacity of 10 tons. We can accommodate both large items and small lot products. If you have any concerns, please do not hesitate to contact us. We are here to help you. Leave your blasting and painting needs to us. Harada Ironworks Co., Ltd. Hiroshima TEL: 082-232-2445 FAX: 082-293-0286 Contact: Tao Mobile: 090-3742-9768 Email: bousei@harada-tekkou.co.jp Official link for Harada Ironworks Hiroshima

• Rust Inhibitor
• Special Construction Method
• paint

If you have requests for sandblasting or grit blasting in Hiroshima, please feel free to consult us. Blasting is a type of surface treatment process that involves colliding various particles with a material to remove the surface and create irregularities. Its effects are as follows: Surface cleaning: It removes oxidation films, rust, and dirt, achieving a clean surface. Improved adhesion: The increase in surface area due to the formation of irregularities creates an "anchor effect," enhancing adhesion with the paint. The durability of the paint is influenced by various factors such as the number of coats and the type of paint, but the impact of the grade of surface treatment can be as much as 50%. Surface preparation is the most important factor in painting. Harada Ironworks is a company with a proud history of 80 years in Hiroshima and possesses one of the largest blasting facilities in the Chugoku region. Please feel free to consult us about painting after blasting. We are here to help. Harada Ironworks Hiroshima Official Link

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Our website, which conveys our technology to many customers, has finally been fully launched. We are sharing a wealth of information, including product information and technical details, etc. We will continue to update it daily, so please take a look. You can view it through the link below.

• Rust Inhibitor
• Special Construction Method
• paint

The lifespan of metal coatings is generally considered to be around 10 to 30 years. The factors that influence this lifespan can be broadly categorized into the following four: Surface Preparation: Proper adjustment of the metal surface before painting is crucial. Cleaning and treating the surface improves the adhesion and durability of the coating. Number of Coats: It is also important to adhere to the appropriate number of coats. Ensuring sufficient coating thickness enhances the corrosion resistance of the metal. Type of Paint: The type of paint used significantly affects the lifespan. It is necessary to select appropriate paint that matches the metal's usage environment, considering factors like weather resistance and chemical resistance. Painting Techniques, Climate, and Surrounding Environment: The skills used in the painting process and the construction environment are also important factors. By employing appropriate painting techniques and considering climate conditions and the surrounding environment, the quality and lifespan of the coating can be improved. By properly managing these elements, the lifespan and corrosion resistance of metal coatings can be maximized. For more details, please refer to the PDF below. Harada Ironworks Hiroshima Official Link

• Rust Inhibitor
• Special Construction Method
• paint

There are mainly two types of film thickness gauges. Wet film thickness gauge: This type of gauge is used after applying liquid paint, before the paint film has fully cured. By accurately measuring the thickness of the paint film, it allows for understanding the film thickness at the time of application. Wet film thickness gauges are helpful for quality control during the application process and for saving paint. Dry film thickness gauge: This type of gauge is used after the applied paint film has completely cured. The dry film thickness gauge is utilized to measure the thickness of the paint film after the painting work is finished, confirming the quality of the finish. By accurately measuring the thickness after curing, it can be determined whether it meets the painting specifications. For more details, please refer to the PDF below. For anything related to blasting and painting, please leave it to us. Harada Ironworks Co., Ltd. TEL: 082-232-2445 FAX: 082-293-0286 Contact: Tao Mobile: 090-3742-9768 Email: bousei@harada-tekkou.co.jp Harada Ironworks Hiroshima Official Link

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• Special Construction Method
• paint

This is a photo of smoke protruding at 15 meters. We smoothly carry out production, painting, and shipping in a vast environment with a site area of 3,700 square meters and a painting area of 650 square meters. Outsourcing the surface preparation and painting of large products often leads to increased costs and delivery times, but our company is equipped with one of the largest large blast facilities in the Chugoku region, allowing us to perform these tasks efficiently and quickly. In addition, in can manufacturing, we process metals such as iron and stainless steel to create a variety of products, including tanks, bridges, steel frames, and platforms. Surface preparation is an important process before painting, where rust, dirt, and deteriorated paint films are removed to optimize the surface for painting. The activated surface enhances the adhesion of the paint, ensuring long-term protection of the product. ◎ Surface Preparation Also known as "Keren," it is one of the surface treatment methods and serves as a pre-treatment for painting work, making the surface more suitable for painting. Surface preparation involves removing rust, dirt, and deteriorated paint films to clean the surface. The activated surface significantly improves the adhesion of the paint, allowing for long-term protection of the product. Harada Ironworks Hiroshima Official Link

• Incinerators and chimneys
• Plastering and painting work
• paint

The large steel plate, measuring 2600×2300 and weighing 5 tons, made of SS400 PL100t, will have its rust removed through grit blasting. While the specific application is unknown, completely removing the rust from this steel plate and applying anti-corrosion treatment can protect the base material from corrosion. Corrosion is a phenomenon where the surface changes due to scientific or electrical factors, impairing its appearance and function. If it progresses, it can lead to a reduction in thickness and the formation of holes. In contrast, anti-corrosion treatment is performed to stop or delay the corrosion of metal materials. Corrosion resistance refers to the ability of the metal material itself to withstand corrosion, while anti-corrosion and rust prevention aim to prevent the corrosion of metals. In this context, grit blasting of steel plates is commonly used. Harada Ironworks Hiroshima Official Link

• Rust Inhibitor
• Special Construction Method
• paint

We will be installing SGP gas pipes of various sizes and diameters. When carrying out the installation, we will protect the gasket seat's serration processing area, as any scratches from blasting could compromise the sealing performance. Once the area is properly covered with cloth tape, we will proceed with surface treatment using blasting. After the blasting is completed, we will apply heat-resistant paint, but the "first part" will conclude with the blasting process. The heat-resistant painting and film thickness inspection will be introduced in the "second part," so please take a look. ◎ SGP (Carbon Steel Pipe for Piping) This is the most familiar steel pipe in our surroundings. It is generally referred to as SGP pipe, gas pipe, white pipe, or black pipe. (The white pipe is an SGP pipe that has undergone zinc plating.) It is used in many places such as buildings, homes, and factories. ◎ Serration Serration refers to a finishing surface with spiral or concentric thin grooves on the flange gasket surface. When flanges are joined together, the unevenness fits together, allowing for a secure connection. [Product Information] Prefabricated piping of approximately 20A to 200A [Surface Preparation] Grit blasting 　SSPC SP-10 [Coating Specifications] Thick film heat-resistant paint 200μm Harada Iron Works Hiroshima Official Link

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In the first part, we introduced the preparation work and blasting, but now we will move on to the painting work. This time, we used a thick-film paint that excels in heat resistance. This paint achieves a film thickness of 100 to 200 μm with a single spray, and its maximum heat resistance temperature is 600℃! The weather resistance due to the thickness of the paint film is also excellent. However, this paint is prone to clogging, so we used the Turn Double Chip from Seiwa Sangyo Co., Ltd. By using this chip, we can reduce paint clogging. There are methods to increase the dilution ratio or to use a larger chip diameter, but the reason we chose this chip is as follows. Increasing the dilution ratio would result in a thinner film thickness, and using a larger chip diameter would increase paint loss. Therefore, following the recommended values from the paint manufacturer, using this chip became the optimal choice. The construction period was 5 working days. The preparation work took 2 to 3 days, and blasting and painting took 2 days. Since the number of days for preparation work affects the order volume, we look forward to specific inquiries regarding requests that include preparation work. Harada Iron Works Hiroshima Official Link

• Special Construction Method
• paint
• Rust Inhibitor

We also welcome the submission of drawings and materials! We have accumulated experience in welding various materials and shapes, so we will carry out the welding work carefully. Additionally, our site area is 3,700 square meters, and our painting area is also 650 square meters, allowing us to smoothly handle everything from manufacturing to painting and shipping. Furthermore, we are fully equipped with blasting and painting facilities, enabling us to accommodate painting on stainless steel materials as well. We provide optimal welding services tailored to our customers' needs. Please feel free to consult or request our services. Harada Iron Works Hiroshima Official Link

• Rust Inhibitor
• Special Construction Method
• paint

I have summarized the characteristics of grit blasting and sand blasting as follows: Characteristics of Grit Blasting: The abrasive material is metallic and has very high grinding power, easily removing adhered rust and dirt. It can also remove rubber, plating, and paint from the surface of products. Compared to other abrasives, it causes less wear when striking the target, resulting in reduced dust and waste. However, since the raw material is metallic, there is a possibility of "transferred rust" occurring when applied to materials that are less prone to rust, such as stainless steel. Characteristics of Sand Blasting: In the past, "silica sand" was used as the abrasive material, but now mainly "ferro-nickel slag," a non-metallic abrasive, is used. Because a non-metallic abrasive is used, it can be applied to materials that are less prone to rust, such as stainless steel. It has less grinding power compared to grit blasting, allowing for careful application on soft metals and products with extensive masking. If you have a specific abrasive material in mind or have inquiries about other application uses, please feel free to contact us. Harada Iron Works Hiroshima Official Link

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• Special Construction Method
• paint

At our company, there are flanges and bolts that require blasting or painting, some of which need to have machined surfaces or threaded areas concealed. Harada Iron Works has extensive experience in handling such products. If you have products that require protection during the process, or if you would like to request a comprehensive service from masking to execution, please feel free to consult with us. Additionally, partial services such as blasting only or painting only are certainly possible. Masking refers to the process of covering areas that will not be treated during blasting or painting using masking tools like tape or caps to protect them. Harada Iron Works Hiroshima Official Link

• Rust Inhibitor
• Special Construction Method
• paint

After blasting a massive pipe weighing 2 tons and measuring 5 meters in length, we will perform underwater painting. A minimum film thickness of 300μm is required for the underwater painting. If the film thickness becomes too thick, there is a risk of peeling, so we will also pay attention to the upper limit of the maximum film thickness while painting. If the set values for the upper and lower limits are too close, the work becomes difficult. To meet these conditions, we repeated inspections and corrective painting multiple times. Ultimately, we achieved a final thickness within the range of 300μm to 600μm, resulting in a perfect finish. [Product Information] Size: φ1500×5000 [Surface Preparation] Grit Blast (SSPC SP-10) [Painting Specifications] Epoxy resin-based special swelling carbon paint 300μm Harada Iron Works Hiroshima Official Link

• Rust Inhibitor
• Special Construction Method
• paint

Large tanks and accessories processed in-house with a consistent approach. Painting specifications for both the interior and exterior are appropriately separated and executed. We also respond quickly to delivery deadlines. Furthermore, this large tank is processed entirely in-house, including the manufacturing of accessories. In addition to the tank, we also produce dedicated ladders, scaffolding, and stairs. This allows us to provide a complete set tailored to customer needs. Additionally, this tank is designed to store wastewater mixed with chemicals. Therefore, we distinguish between the painting specifications for the interior and exterior. The interior is coated with a waterproof epoxy resin paint applied twice to withstand chemicals and wastewater. On the other hand, the exterior is coated with waterproof epoxy resin paint and polyurethane resin paint to resist external elements such as UV rays and rainwater while maintaining aesthetics. As product information, the capacity of this tank is 30㎥. In terms of painting specifications, after surface preparation, the interior receives two coats of waterproof epoxy resin paint, while the exterior receives one coat each of waterproof epoxy resin paint and polyurethane resin paint. By maintaining consistent production in-house, we can respond quickly to delivery deadlines. We provide high-quality tanks tailored to customer requirements. Harada Iron Works Hiroshima Official Link

• Special Construction Method
• Rust Inhibitor
• paint