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用电化学测试和量子化学计算法研究L-甲硫氨酸、L-胱氨酸及L-半胱氨酸在1 mol/L H_2SO_4体系中的缓蚀性能和缓蚀机理。结果表明,在0.1 mmol/L～0.1 mol/L浓度范围内,随浓度的增加,L-甲硫氨酸和L-半胱氨酸的缓蚀效率均增大,而L-胱氨酸的缓蚀效率存在～个先增大后减小的变化过程。这三种氰基酸在碳钢表面的吸附机理是氨基酸提供电子,Fe提供空轨道,两者以配位键键合。
The corrosion inhibition and inhibition mechanisms of L-methionine, L-cystine and L-cysteine in 1 mol / L H 2 SO 4 system were studied by electrochemical tests and quantum chemistry calculations. The results showed that the inhibition efficiency of L-methionine and L-cysteine increased with the increase of the concentration in the concentration range of 0.1 mmol / L to 0.1 mol / L, Inhibition efficiency exists ~ a first increase and then decrease the change process. The adsorption mechanism of these three cyano acids on the surface of carbon steel is to provide electrons for the amino acids, Fe to provide empty orbitals, and the two are coordinated by coordination bonds.