As the steel is removed from the pickling bath, a thin oxide layer forms immediately over the surface.

当从酸浸浴中取出钢时，其表面就会立即形成一层薄薄的氧化物。

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

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。

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