Tinned copper wire is easy to yellow several reasons

Release time： 2021-11-30 15:59

【Summary description】 Tin furnace temperature is too high, large liquidity, resulting in large pinhole coating, copper tin penetration fast

The common causes of yellowing are:
1, tin furnace temperature is too high, large liquidity, resulting in large coating pinhole, copper tin penetration fast
2, tin layer is too thin, copper tin penetration fast
3, flux halogen residue is too much, copper surface pickling is not thorough enough
4. The packaging time is too fast, the heat is not scattered, and the impurities in the tin furnace are too much
5 copper quality is not up to standard, too many miscellany because the temperature affects the speed of atomic activity, so hot days yellow faster than cold days this problem is dealt with as follows: 1. Die aperture > Line length +0.02mm(the purpose is very simple not too thin coating); 2. After production, it can be placed for about 2 hours and then packaged (purpose: internal heat dissipation). 3. Buy good flux, with good flux concentration, mainly flux affecting tin quality; 4. Choose better anaerobic copper wire;