The results indicated that the dejects was caused by pitting corrosion of impurity element iron in silver coin by environmental chloride compound.

• 结果表明，在银币缺陷部位的腐蚀坑内存在以铁元素为主的物质，基材中的铁元素与外界的氯引起银币的腐蚀，造成了表面缺陷。