Some pits were produced in the surface of the stainless steel owing to the rapping of the hammer with edge angle when carrying on cold assembly.

• 结果表明冷装配时带楞角铁锤敲击造成的表面凹坑处、焊接时飞溅与电弧擦伤处的电极电位发生了变化,促使了点蚀的发生;