| ZHENG Xing-wen,GONG Min,ZENG Xian-guang,JIANG Chun-mei,LU Li-juan,JIEKE Zi-sha.Corrosion Inhibition of L-phenylalanine for Q235 Steel in Sulfuric Acid Solutions[J],(3):33-36 |
| Corrosion Inhibition of L-phenylalanine for Q235 Steel in Sulfuric Acid Solutions |
| Received:December 26, 2011 Revised:June 20, 2012 |
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| DOI： |
| KeyWord:L-phenylalanine Q235 steel corrosion inhibitor adsorption behavior |
| Author | Institution |
| ZHENG Xing-wen |
Sichuan University of Science & Engineering, Zigong, China |
| GONG Min |
Sichuan University of Science & Engineering, Zigong, China |
| ZENG Xian-guang |
Sichuan University of Science & Engineering, Zigong, China |
| JIANG Chun-mei |
Sichuan University of Science & Engineering, Zigong, China |
| LU Li-juan |
Sichuan University of Science & Engineering, Zigong, China |
| JIEKE Zi-sha |
Sichuan University of Science & Engineering, Zigong, China |
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| Abstract: |
| The corrosion inhibition performance and inhibition mechanism of L-phenylalanine(LPHA) for Q235 steel in 0.5mol/L H2SO4 solutions were evaluated using electrochemical methods. The corrosion inhibitor type was analyzed. The results indicated that the inhibition efficiency of LPHA for Q235 steel in 0.5 mol/L H2SO4 solutions increased with increasing the concentration of LPHA,and with increasing temperature, due to the increase of the number of inhibitor molecules adsorbed on one active site,the inhibition efficiency increased; LPHA was a mixed-type inhibitor and the inhibition mechanism of which was coverage effect. The adsorption of LPHA on the surface of Q235 steel was monolayer adsorption and conformed with El-Awa dydynamic model. |
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