Corrosion inhibition of N,N'-methylene bisacrylamide and OP-10 on Q235 steel in 1 mol/L HCL
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 cor-rosion inhibition concentration,weight loss experiment,electrochemical experiment,surface analysis and theoretical simulation were adopted.The corrosion inhibition properties of NN and N&P on Q235 steel 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 efficien-cy 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-10 molecule and the C=O bond,C=C bond and C-N bond in NN molecule,and N&P has a good synergis-tic effect.
N,N'-methylene bisacrylamideOP-10electrochemistryweight loss experimentcorro-sion inhibition performancequantum chemistry
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