Semiconducting Behavior of Organic Polymer Coating during its Degradation in 5‰ Sulfuric Acid Solution

Gang Chen; Wei Dong Liu; Qing Dong Zhong

doi:10.4028/www.scientific.net/AMR.399-401.1932

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 399-401Semiconducting Behavior of Organic Polymer Coating...

Semiconducting Behavior of Organic Polymer Coating during its Degradation in 5‰ Sulfuric Acid Solution

Abstract:

In this paper, the semiconducting behavior of No.20 carbon steel coated with different polymer coating in 5‰ sulfuric acid solution was studied by utilizing potential-capacitance and Mott-Schottky analysis. It showed that in the same testing condition, the phenol aldehyde resin and epoxy resin showed n-type semiconducting behavior in 5‰ sulfuric acid, whereas for the alkyd resin, it showed p-type semiconducting behavior in 5‰ sulfuric acid solution. It was suggested that the space charge layer of the polymer coating in 5‰ sulfuric acid solution might be asymmetry. It was suggested that at the early stage of immersion, the polymer coating behaved as an insulator, with increasing immersion time, the coating transferred to P-type semiconductor, then to N-type semiconductor.

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Periodical:

Advanced Materials Research (Volumes 399-401)

Pages:

1932-1936

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.399-401.1932

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Online since:

November 2011

Authors:

Gang Chen, Wei Dong Liu, Qing Dong Zhong

Keywords:

Acid Corrosion, Acid Solution, Polymer Coatings, Steel

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References

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