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Adsorption Behavior and Corrosion Inhibition of EPP for Q235 Steel in H2SO4 Solution

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Abstract:

The inhibition effect of N,N-diethylammonium O,O'-di(2-phenylethyl)dithiophosphate (EPP, [NH2(Et)2][S2P(OCH2CH2Ph)2]2) against the corrosion of Q235 steel in H2SO4 solution was studied by weight loss measurement, potentiodynamic polarization and SEM(scanning electron microscope) techniques. The results show that EPP acts as an excellent corrosion inhibitor in 5% H2SO4 by suppressing simultaneously the cathodic and anodic processes via chemical adsorption on Q235 steel surface, which complies with the Langmuir adsorption isotherm. Polarization curves indicate EPP is a mixed-type inhibitor. The effects of temperature, acid concentration and immersion time were also studied.

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Periodical:

Advanced Materials Research (Volumes 287-290)

Pages:

2923-2926

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.287-290.2923

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Online since:

July 2011

Authors:

Li Ke Zou, Chuan Lai, Bin Xie, Xue Yang, Zhen Xiang, Ni Zeng, Chun Huang, Yang Mei Wang

Keywords:

Acid, Adsorption, Corrosion Inhibitor, O,O'-dialkyldithiophosphate, Q235 Steel

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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