In response to many requests, we have added a 4L size of the copper discoloration inhibitor.
"I want to buy it, but 18L is too much." "I want a small amount considering storage." "I want to use it for testing, so a one-kan can is too much." We have received numerous requests like these. In response to these requests, we have added a 4L size for the copper discoloration preventives BT-5, BT-7, and BT-8. We have long received feedback on this product, such as: "It is very useful because it can remove oil stains and oxidation films from dirty copper that has gotten oil or glove marks after machining and bending, allowing us to deliver it in its original copper color." "Even though I removed the discoloration from the copper, it would quickly turn red again, but by using BT-5, it no longer discolors." Please take advantage of the newly convenient and easily purchasable 4L size.
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basic information
This is a water-soluble copper discoloration inhibitor that forms a complex of copper and organic substances on the copper surface, preventing oxidation and long-term discoloration. It features the ability to achieve coating treatment simply by immersion. ■ BT-5 forms a copper discoloration protective film. It is a standard product among the BT series. ■ The surface treated with this agent does not experience a decrease in electrical resistance. ■ It also has good adhesion to paints, reducing the rate of defects. ■ The discoloration prevention film treated with BT-5 on the copper surface is very strong at low temperatures below 40-50°C, completely preventing discoloration. However, as the temperature rises, the discoloration prevention film is destroyed, and its ability to prevent discoloration decreases. ■ It is a neutral water-soluble agent. ■ Simply immersing in this agent diluted with water at a ratio of 10 to 20 times will prevent oxidation for a long time and maintain a beautiful surface. ■ Immersion temperature: Room temperature to 60°C (recommended 50-60°C) ■ Immersion time: 30 seconds to 2 minutes (varies depending on immersion temperature). ■ For copper products that have already discolored due to cutting oil or heat from machining, it is more effective to use in conjunction with a copper oxide film remover like CU-600. ■ Please also use it for discoloration prevention after plating or barrel polishing. It is effective even when added simultaneously during barrel polishing.
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Applications/Examples of results
Prevention of discoloration of copper materials and copper processed products. Primary rust prevention for copper-plated items. We have extensive achievements in preventing the formation of oxide films (discoloration) on various copper materials and copper alloys. 【Specifications】 ■Appearance: Colorless transparent liquid ■Specific gravity: 0.95 ■pH: Neutral 【Usage Instructions】 Copper material → Degreasing → Rinsing with water → CU-600 → Rinsing with water → BT-5 → Rinsing with water → Drying Point 1: If the copper surface is not kept clean, unevenness will occur, leading to early discoloration due to the inability to obtain a uniform rust prevention film. Point 2: If water droplets are left during the drying process, water marks will form, so make sure to thoroughly remove all water droplets.
Line up（1）
| Model number | overview |
|---|---|
| BT-5 | This is a neutral water-soluble copper discoloration inhibitor. By forming an oxidation prevention film on the copper surface, it provides a strong discoloration prevention effect. The electrical resistance value does not change. The adhesion of the paint is also good. |
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Company information
Asahi Corporation has been listening to our customers' requests and striving to develop products that meet their needs since our founding in 1958. So far, we have released a variety of products, including cleaning agents for kitchen areas, car shampoos and waxes for car wash machines, as well as copper and silver tarnish prevention agents. In recent years, there has been a growing demand for environmentally friendly chemicals, leading to an increase in requests for degreasers, cleaning agents, tarnish prevention agents for semiconductors, and high heat-resistant tarnish prevention agents that do not use strong acids or strong alkalis. Our products have been developed in response to such voices from the beginning. We will continue to listen to a variety of feedback and develop new products.