Must do derusting and to oxidation film processing, generally use chemical polishing or electrolytic polishing.
必须先做除锈及去氧化膜处理，一般使用化学抛光或电解抛光。
Chemical oxidation: through the chemical processing the metal surface oxidation film formation process.
化学氧化：通过化学处理使金属表面形成氧化膜的过程。
It is mainly reason that wet and salt spray environment and thin film of chemical oxidation.
潮湿的盐雾环境和化学氧化膜的薄而软是引起腐蚀的主要原因。
It is mainly reason that wet and salt spray environment and thin film of chemical oxidation.
潮湿的盐雾环境和化学氧化膜的薄而软是引起腐蚀的主要原因。
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