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Studying the cathodic disbondment of coatings using electrochemical impedance spectroscopy

Mahdavi,F, Tan,MYJ, Forsyth,M, Gupta,R and Abreu,D 2014, Studying the cathodic disbondment of coatings using electrochemical impedance spectroscopy, in Corrosion and Prevention : Proceedings of the 2014 Annual Conference of the Australasian Corrosion Association, Australasian Corrosion Association, [Darwin, Northern Terroritory], pp. 1-12.

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Title Studying the cathodic disbondment of coatings using electrochemical impedance spectroscopy
Author(s) Mahdavi,F
Tan,MYJ
Forsyth,MORCID iD for Forsyth,M orcid.org/0000-0002-4273-8105
Gupta,R
Abreu,D
Conference name Australasian Corrosion Association. Conference (2014 : Darwin, Northern Territory)
Conference location Darwin, Northern Terroritory
Conference dates 15-18 Nov. 2014
Title of proceedings Corrosion and Prevention : Proceedings of the 2014 Annual Conference of the Australasian Corrosion Association
Editor(s) [Unknown]
Publication date 2014
Conference series Australasian Corrosion Association Conference
Start page 1
End page 12
Total pages 12
Publisher Australasian Corrosion Association
Place of publication [Darwin, Northern Terroritory]
Keyword(s) Cathodic disbondment
Cathodic protection
Coating defect
Electrochemical impedance spectroscopy (eis)
Epoxy coating
Summary The disbondment of protective organic coatings is a widely reported pipeline coating failure mode in the oil and gas industry. Traditional methods of evaluating cathodic disbondment of pipeline coatings are based on visual inspection of pipeline conditions, and laboratory testing of cathodic disbondment resistance (CDR) using standard methods such as ASTM G8. Although some other laboratory-based techniques, such as scanning kelvin probe and scanning acoustic microscopy have been used to study the cathodic disbondment (CD) of coatings, these are often difficult to apply in practical testing. Over the past decade, electrochemical impedance spectroscopy (EIS) has been employed as a potential method for measuring CD. This paper reports preliminary results from an EIS study designed to characterise CD behaviour of epoxy coatings under excessive cathodic protection. EIS data correlated well with the area of disbonded coating. Analysis of EIS data can provide valuable information on the initiation and rates of CD.
Language eng
Field of Research 030604 Electrochemistry
091207 Metals and Alloy Materials
Socio Economic Objective 870302 Metals (e.g. Composites, Coatings, Bonding)
HERDC Research category E1 Full written paper - refereed
ERA Research output type E Conference publication
Copyright notice ©2014, Australasian Corrosion Association
Persistent URL http://hdl.handle.net/10536/DRO/DU:30069096

Document type: Conference Paper
Collections: School of Engineering
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