SYNERGISM OF RARE EARTH Ce(III) ION WITH CYSTEINE AGAINST CORROSION OF P110 CARBON STEEL IN 3% NaCl SOLUTIONS

Xia Liu, Jianshu Yang (), Yongping Liu (), Xiangyun Ji (), Ying Lu () and Yizhi Yuan ()
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Xia Liu: Department of Applied Chemistry, Shenyang University of Chemical Technology, Shenyang, P. R. China
Jianshu Yang: Department of Applied Chemistry, Shenyang University of Chemical Technology, Shenyang, P. R. China
Yongping Liu: Department of Applied Chemistry, Shenyang University of Chemical Technology, Shenyang, P. R. China
Xiangyun Ji: Department of Applied Chemistry, Shenyang University of Chemical Technology, Shenyang, P. R. China
Ying Lu: Department of Applied Chemistry, Shenyang University of Chemical Technology, Shenyang, P. R. China
Yizhi Yuan: Department of Applied Chemistry, Shenyang University of Chemical Technology, Shenyang, P. R. China

Surface Review and Letters (SRL), 2017, vol. 24, issue 02, 1-6

Abstract: The synergism of CeCl3 (Ce) with cysteine (Cys) on the corrosion of P110 carbon steel in 3% NaCl solutions was investigated by electrochemical methods and surface analysis. The results showed that CeCl3 and cysteine do little to inhibit the corrosion of carbon steel, but the combination of CeCl3 with cysteine has obvious synergistic effect on the corrosion of carbon steel and the corrosion inhibition efficiency was improved significantly. The potentiodynamic polarization curves indicated that the mixture of CeCl3 and cysteine acts as a cathodic inhibitor. Scanning electron microscope (SEM) and Infrared (IR) reflection spectra showed the synergistic inhibition effect was formed by the complexes between rare earth Ce(III) ion and amino acid.

Keywords: Corrosion; synergistic inhibition effect; rare earth; amino acid (search for similar items in EconPapers)
Date: 2017
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DOI: 10.1142/S0218625X1750024X

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