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采用失重法测试了Fe~（3+）在酸洗中对钢铁的影响，以及多功能酸洗缓蚀抑雾剂CQH－2对Fe~（3+）腐蚀的抑制作用，采用恒电流法，线性极化技术测试了极化曲线，分析讨论了CQH－2的吸附等温式。
The effect of Fe ~ (3+) on steel during pickling and the inhibition of Fe ~ (3 +) corrosion by multifunctional acid pickling corrosion inhibitor CQH-2 were tested by weight loss method. Polarization curve was tested by linear polarization technique. The adsorption isotherm of CQH-2 was analyzed and discussed.