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| STUDY OF THE SULFUR-CONTAINING AMINO'S STRUCTURE AND CORROSION INHIBITION MECHANISM IN H2SO4 |
| GONG Min, ZHANG Yu, ZHENG Xingwen, FENG Min, ZHANG Guohu, YANG Lin |
| Material and Chemical Engineering Department, Sichuan University of Science & Engineering, Zigong 643000 |
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Abstract Electrochemical testing, and quantum chemistry calculations were used to study the corrosion inhibition mechanism of L-methionine, L-cystine, L-cysteine in 1 mol/L sulfuric acid system. The results of linear polarization, Tafel extrapolation and EIS showed that inhibition efficiency of L-methionine and cysteine increased with the increase of the concentration among 0.0001 mol/L~0.1 mol/L. And these three amino acids adsorption in carbon steel is provided by the amino acids to provide electronic, air-rail track, two coordination bonds to bonding.
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Received: 19 July 2010
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Corresponding Authors:
ZHANG Yu
E-mail: zygrxx@163.com
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