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Degradation of organic coatings in a corrosive environment: a study by scanning Kelvin probe and scanning acoustic microscope

Abstract:

Degradation of pigmented epoxy coatings on a steel substrate during exposure to aerated 3% NaCl solution has been investigated using the scanning Kelvin probe (SKP) and scanning acoustic microscopy (SAM). A method for processing SKP potential maps has been used to visualize the distribution of anodic and cathodic current. It was observed that rust deposited at the defects, or later beneath the coating, acted as a cathodic reactant, leading to development of new anodes beneath the coating. Exp...

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Publication status:
Published

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Institution:
University of Oxford
Division:
MPLS
Department:
Materials
Role:
Author
Journal:
PROGRESS IN ORGANIC COATINGS More from this journal
Volume:
52
Issue:
4
Pages:
280-287
Publication date:
2005-04-01
Event title:
3rd International Workshop on Application of Electrochemical Techniques to Organic Coatings
DOI:
ISSN:
0300-9440
Keywords:
Pubs id:
pubs:11833
UUID:
uuid:cdce770c-7956-481a-be19-1f7b5aa97797
Local pid:
pubs:11833
Source identifiers:
11833
Deposit date:
2012-12-19

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