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SN74HC4020N TI 引脚发黄氧化

  TI的工程师您好!

     我之前跟TI代理买了SN74HC4020N,年份是2018年的,具体批号是88AGHCME4 ,客户收到货后放映引脚氧化,要求退货,代理让我与你们联系处理,附上客户发过来的两张图片,请你们尽快帮忙看一下,是否氧化?如果不是氧化,又是什么问题?盼复!感谢!