Enhanced inhibition of steel corrosion by L-cysteine under visible-light illumination
P. Qiu, H. F. Yang, L. J. Yang, Z. S. Chen, L. J. Lv, Y. Song and C. F. Chen
Version of Record online: 24 APR 2017 | DOI: 10.1002/maco.201609386
The steel sample surface could cover with iron oxides and hydroxides upon contact with the sodium chloride solution, the thiol head of L-cysteine as an inhibitor exhibits a strong affinity to adsorb on the substrate in dark condition. Essentially, L-cysteine molecule can bond to the substrate through bridge adsorption, thiol, and amino group owing to the sample surface photovoltaic effect under visible-light illumination condition. So we can observe an enhanced inhibition performance.