The alloy layer of tinplate is an intermetallic compound formed between base plate and tin coating through thermodiffusion during the treatment of heating and fusing after electrotinning.

镀锡板合金是镀锡后熔融处理程中通扩散基板与锡生成的一种金属化合物,因此,合金的生成与原板和镀都有很大关系。