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Ask for chrome plating of loose holes on piston ring end face

活塞环(铬钼铸铁)端面松孔镀铬时出现:1)非镀面出槽后马上出现锈蚀;2)松孔后出现局部肉眼能见的龟裂纹,3)零件镀铬后平面翘曲度变大


有哪位高手能指点一下,不胜感谢!



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