Considerations associated with the testing of external pipeline coatings

Abreu, D, Tan,MYJ, Bryson, A, Fletcher, A, Cope, G and Pearson, G 2013, Considerations associated with the testing of external pipeline coatings, in Annual Conference of the Australasian Corrosion Association 2013: Corrosion and Prevention 2013, Australasian Corrosion Association, Melbourne, Vic., pp. 319-330.

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Title Considerations associated with the testing of external pipeline coatings
Author(s) Abreu, D
Bryson, A
Fletcher, A
Cope, G
Pearson, G
Conference name Corrosion and Prevention
Conference location Brisbane, Qld
Conference dates 11-13 Nov, 2013
Title of proceedings Annual Conference of the Australasian Corrosion Association 2013: Corrosion and Prevention 2013
Publication date 2013
Start page 319
End page 330
Total pages 12
Publisher Australasian Corrosion Association
Place of publication Melbourne, Vic.
Keyword(s) Adhesion
Cathodic disbondment
Protective coating
Testing methods
Summary Reliable testing methodologies for the assessment of protective coatings are critical for ensuring the integrity and durability of pipeline coatings (such as field joint coatings) and the mitigation of pipeline corrosion. Currently the failure of joint coatings is one of the major concerns in corrosion protection of pipelines, although they represent only approximately 5% of the coated area in a pipeline system. This paper presents an overview of major testing methodologies currently used in the pipeline industry for the selection, testing, and life prediction of coatings, in particular field joint coatings. Particular focus is on the discussion of difficulties and limitations in testing methods for assessing pipeline coating cracking, cathodic disbondment and loss of adhesion. It is shown that there are limitations in current methodologies in evaluating the coating flexibility - a key parameter for avoiding coatings cracking during hydrostatic testing, cyclic pressure operation and field bending. Methodologies for assessing the effect of holidays in coatings on the cathodic disbondment of pipeline coating under excessively negative cathodic protection (CP) voltages also require improvement. Furthermore, methods for understanding the effects of coating wet adhesion on pipeline coating, cracking and disbondment also need attention. Some preliminary results for addressing some of these issues are also presented in this paper.
ISBN 9781634394369
Language eng
Field of Research 030604 Electrochemistry
091207 Metals and Alloy Materials
Socio Economic Objective 870302 Metals (e.g. Composites
HERDC Research category E1.1 Full written paper - refereed
ERA Research output type E Conference publication
Copyright notice ©2013, Australasian Corrosion Association
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