N,N'-亚甲基双丙烯酰胺与OP-10对Q235钢在1 mol/L HCl中的缓蚀作用

Corrosion inhibition of N,N'-methylene bisacrylamide and OP-10 on Q235 steel in 1 mol/L HCL

针对在酸洗工况下金属的腐蚀问题,为解决单一缓蚀剂的成本高、效率低的问题,在N,N’-亚甲基双丙烯酰胺(NN)的最佳缓蚀浓度基础上将其与OP-10复配(N&P),采取失重实验、电化学实验、表面分析和理论模拟的方法,研究了NN和N&P缓蚀剂对Q235钢在1.0 mol/L HCl溶液中的缓蚀性能。结果表明:在30℃条件下,NN的交流阻抗谱、动电位极化曲线和失重实验所得的最佳缓蚀率分别为73.32%、85.57%、77.46%,而将NN与OP-10复配后的缓蚀效率分别提升至92.34%、96.26%、90.14%。量子化学表明:N&P吸附位点主要为OP-10分子中的大Π键和C-O键以及NN分子中的C=O键、C=C键、C-N键,具有较好的协同效应。

In order to solve the problem of high cost and low efficiency of a single corrosion inhibitor,N,N'-methylene diacrylamide(NN) was combined with OP-10(N&P) on the basis of the optimal corrosion inhibition concentration,weight loss experiment,electrochemical experiment,surface analysis and theoretical simulation were adopted.The corrosion inhibition properties of NN and N&P on Q235steel in 1.0 mol/L HCl solution were studied.The results show that at 30 ℃,the optimal corrosion inhibition rates obtained by AC impedance spectrum,potentiodynamic polarization curve and weight loss experiment are 73.32%,85.57% and 77.46%,respectively,while the corrosion inhibition efficiency of NN combined with OP-10 is increased to 92.34%,96.26% and 90.14%,respectively.Quantum chemistry shows that the adsorption sites of N&P are mainly the bigπbond and C-O bond in OP-10molecule and the C=O bond,C=C bond and C-N bond in NN molecule,and N&P has a good synergistic effect.