Causes of brown or black spots in brass barrel plating of small hardware were analyzed and some counter measures were put forward.
分析了小五金产品滚镀黄铜层易产生棕黑斑点的原因，论述了黄铜层出现棕黑斑点是零件基材腐蚀的开始。
Causes of brown or black spots in brass barrel plating of small hardware were analyzed and some counter measures were put forward.
分析了小五金产品滚镀黄铜层易产生棕黑斑点的原因，论述了黄铜层出现棕黑斑点是零件基材腐蚀的开始。
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