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A Polyaniline Coating Material for Inhibiting Corrosion in Marine Environment

Published online by Cambridge University Press:  21 March 2011

Yuan Lin ,
Sze C. Yang ,
Robert Clark  and
Richard Brown
Yuan Lin
Affiliation:
Univ of Rhode Island, Chemistry Department, Kingston, RI
Sze C. Yang
Affiliation:
Univ of Rhode Island, Chemistry Department, Kingston, RI
Robert Clark
Affiliation:
Univ of Rhode Island, Chemistry Department, Kingston, RI
Richard Brown
Affiliation:
Univ of Rhode Island, Chemical Engineering Department, Kingston, RI
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Abstract

The conventional molecular ion doped polyaniline undergoes dedoping in sea water because the sea water, with pH = 8, induces deprotontation of polyaniline. In this article we report polyaniline complexes that remain conductive in sea water. These complexes are useful for corrosion protection of metals in marine environment and for chromate replacement coatings. The reason for the pH stability of these polyaniline complexes was discussed. The polymeric complexes of polyaniline were used as an additive in an epoxy primer coating on AL7075-T6 without surface pre-treatment of the metal. Corrosion tests show that these polymeric complexes of polyaniline are effective for improving the corrosion inhibition in seawater for aluminum alloys.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 598: Symposium BB – Electrical, Optical, & Magenetic Properties...V , 1999 , BB5.8
Copyright
Copyright © Materials Research Society 1999

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References

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