Are you struggling with the discoloration of copper? ASAHI's BT series protects copper from discoloration due to oxidation.
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 has the characteristic of achieving coating treatment through immersion only. 【Specifications】 ■Appearance: Colorless transparent liquid ■Specific gravity: 0.95 ■pH: Neutral ■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 with 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.
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basic information
■It is a neutral water-soluble agent. ■Simply immersing the product 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 to 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, using a copper oxide film remover like CU-600 in conjunction will be even more effective. ■Please also use it to prevent discoloration after plating or barrel polishing. It is effective even when added simultaneously during barrel polishing. 【Usage Instructions】 Copper material → Degreasing → Rinsing → CU-600 → Rinsing → BT-5 → Rinsing → Drying Point 1… If the copper surface is not kept clean, unevenness will occur, leading to early discoloration due to an uneven rust-proof 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. *For more details, please contact us or download the catalog if desired.
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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 a wealth of experience in preventing the formation of oxide films (discoloration) for various copper materials and copper alloys.
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.
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