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研究了在2.0～9.0 mol/L磷酸溶液体系中,邻菲罗啉单体及邻菲罗啉与溴离子复配对冷轧钢的缓蚀行为。结果表明邻菲罗啉单体对冷轧钢在磷酸溶液中缓蚀性能有限,但当与0.03mol/L溴离子复配时,表现出强烈的协同缓蚀效应,且该复配缓蚀剂尤其适用于高浓度磷酸体系,单体及复配缓蚀剂在冷轧钢表面的吸附均符合Langmuir吸附模型,吸附热、吸附熵、吉布斯自由能和吸附平衡常数等热力学参数以及表观活化能、指前因子等动力学参数也一并求得。
The corrosion inhibition of cold-rolled steel with ortho-phenanthroline monomer and 1,10-phenanthroline and bromide ion in 2.0-9.0 mol / L phosphoric acid solution was studied. The results show that the phenanthroline monomer has a limited corrosion inhibition effect on cold-rolled steel in phosphoric acid solution. However, when it is combined with 0.03 mol / L bromide ion, it exhibits a strong synergistic corrosion inhibition effect, and the compound corrosion inhibitor It is especially suitable for high concentration phosphoric acid system. The adsorption of monomer and compound corrosion inhibitor on the surface of cold-rolled steel accords with the Langmuir adsorption model, the thermodynamic parameters such as adsorption heat, adsorption entropy, Gibbs free energy and adsorption equilibrium constant, Activation energy, pre-exponential kinetic parameters are also obtained.