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 preventive agent that forms a complex of copper and organic substances on the copper surface, preventing oxidation and long-term discoloration. It has the characteristic that a coating treatment can be achieved simply by immersion. 【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 to paints, reducing the rate of defects. ■The discoloration preventive film treated on the copper surface by BT-5 is very strong at low temperatures below 40-50°C, completely preventing discoloration. However, as the temperature rises, the discoloration preventive film is destroyed, and its discoloration prevention capability 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 use it to prevent discoloration after plating or barrel polishing. It is also effective 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 inconsistent anti-rust film. Point 2… If water droplets are left during the drying process, water marks will form, so make sure to completely remove the 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 extensive achievements in preventing the formation of oxide films (discoloration) on 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 Co., Ltd. has been in operation since 1958, and we have always listened to our customers' requests and focused on researching and developing products that meet their needs. So far, we have released numerous products, including cleaning agents for kitchens, 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 traditionally been developed in response to such voices. Moving forward, we will continue to listen to various feedback and develop new products.