Effect of Amino Acids on the Corrosion of Steel in Sulfuric Acid Solutions

Abstract:

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The influence of amino acids on the corrosion behaviour of steel in H2SO4 solutions was studied by potentiodynamic polarization, AC impedance and weight-loss. The Potentiodynamic polarization curve results show that compound amino acids are mixed-type inhibitors which inhibit the reactions of anode and cathode; AC impedance results show that the ternary complex inhibitors have a good synergistic effect and high corrosion rate which can be proved by Resistance (Rt), double-layer capacitance (Cdl), Resistance modulus(︱Z︱), and phase angle from the Nyquist chart, Bode chart and phase angle chart. The weight-loss method show that the corrosion efficiency of composite amino acids are over 90% in 0-16 hours, 30-50°Cand 0.4-2.0mol / L sulfuric acid.

Info:

Periodical:

Advanced Materials Research (Volumes 239-242)

Edited by:

Zhong Cao, Xueqiang Cao, Lixian Sun, Yinghe He

Pages:

3142-3145

DOI:

10.4028/www.scientific.net/AMR.239-242.3142

Citation:

X. H. Liu et al., "Effect of Amino Acids on the Corrosion of Steel in Sulfuric Acid Solutions", Advanced Materials Research, Vols. 239-242, pp. 3142-3145, 2011

Online since:

May 2011

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Price:

$35.00

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