前言： 常规的铝合金碱蚀工序时间长，易产生“过腐蚀” ；

For normal alkali corrosion procedure of aluminum alloy, the treatment time is long, and exceeding corrosion will occur.

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电镀工艺中的封孔、振光、除油、酸洗等工序必须添加缓蚀剂，且低温封孔，以避免过腐蚀。

Corrosion inhibitor must be added in sealing, sanding, degreasing and pickling to avoid over-corrosion, and sealing should be operated at low temperature.

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结果表明，黄铜的化学抛光包括浸蚀、光亮和过腐蚀三个阶段，同时对黄铜化学抛光机理也进行了探讨。

Experimental results show that the polishing process includes the steps of etching, brightening and over-etching. The mechanism are also discussed.

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