The serious corrosion problem at low temperature could be found in atmospheric-vacuum distillation unit, especially in the atmosphere overhead condenser.

常减压装置存在较为严重的低温位腐蚀问题，尤其是常压塔顶冷凝器腐蚀问题更为严重。

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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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The corrosion mechanism of the equipment and pipeline in FCC unit low temperature system is expounded together with the corrosion protection measures both at home and abroad.

论述了催化裂化低温系统的设备、管道腐蚀机理，以及国内外一贯采用的防腐蚀措施。

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