一种N-H酸曼尼希碱在盐酸中对N80 钢的缓蚀行为

Corrosion Inhibition of an N-H Mannich Base for N80 Steel in Hydrochloric Acid

苏铁军 李克华 习伟 罗运柏

SU Tiejun LI Kehua XIWei LUO Yunbai

采用失重法、电化学测试研究了1-苯胺甲基苯并咪唑（BMP）在盐酸介质中对N80 钢的缓蚀行为。结果表明，在5 mol/L 的盐酸中，BMP 对N80 钢有明显的缓蚀作用，当BMP 浓度为2 mmol/L 时，缓蚀效率可达88%（333K）。腐蚀反应的活化能随着BMP浓度的提高而增大。在303～333K范围内，BMP在N80 钢表面的吸附行为遵循Langmuir 吸附等温式，吸附能均低于-35 kJ/mol。同时采用分子动力学模拟对BMP的缓蚀作用做了进一步分析。图12 表4 参14

The inhibition actions of 1-phenylaminomethyl-benzimidazole（BMP）on the corrosion of N80 steel in HCl was studied by means of weight loss and electrochemical test. The results showed BMP could inhibit the corrosion of N80 steel in 5 mol/L HCl solution at the BMP concentration of 2 mmol/L, and the inhibition efficiency was more than 88% at the temperature of 333K. Active energies on the corrosion reaction increased with the increase of inhibitor concentration. The adsorption of BMP on the surface of N80 steel obeyed Langmuir isotherm, and adsorption energies were less than -35 kJ/mol in the temperature range of 303～333 K. In addition, the inhibition performance of BMP was investigated by molecular dynamics simulation method.