In response to many requests, we have added a 4L size of the copper discoloration prevention agent.
"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-gallon 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. For some time now, we have received feedback on this product: "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 the discoloration of copper was removed, it would quickly turn red again, but by using BT-5, it no longer discolors." Please take advantage of the newly convenient and easy-to-purchase 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 within 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, using a copper oxidation film remover like CU-600 in conjunction will be even more effective. ■ Please use it for preventing discoloration after plating or barrel polishing. It is also effective 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 a lot of 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 → Water wash → CU-600 → Water wash → BT-5 → Water wash → Drying Point 1: If the copper surface is not kept clean, unevenness will occur, leading to early discoloration due to an inconsistent rust prevention film. Point 2: If water droplets are left during the drying process, water marks will form, so be sure to thoroughly remove any 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 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.