For example steel base plated copper, nickel, chromium plating, low layer again tin bronze chrome, multi-layer nickel chrome plating nickel ferroalloy, chrome, and so on.
例如钢基上镀铜、镍层再镀铬、低锡青铜上镀铬、多层镍上镀铬、镍铁合金镀层上镀铬等等。
2
Before or tinplating nickel plating of bad contacts between the cathode, discharge sparks will melt into hollow copper hole.
镀镍前或锡电镀间的阴极接触不良，放电火花将铜材熔成凹洞。
3
A new immersion plating process was developed in which copper sulfate and stannous sulfate were used as main salt, with addition of complex, brightener and stabilizer to tin salt.