The core wire twisting wire peeling after soldering, using disposable flux, lead-free solder, tin products place several days will be black, what is the problem? How to solve?
Where the tin is stained, the product is oxidized,Abnormal handling of the product: re - oxidize the product to the tinIf the terminal is to solve this problem, only professional wire flux will be changed
Your trouble is that black lead free tin tin oxide on this fault. After countermeasures solder products in plastic box fitted up, good sealing point, placed inside the bag desiccant
Flux acid value is too high, it is recommended to change the flux, or add appropriate amount of diluent. There may be tin impurities exceed the standard.
