Comparison of Cathodic Disbondment Test Methods

Protective coatings and cathodic protection (CP) are commonly used together as a means of corrosion defense for buried or immersed metallic structures. However, CP can have detrimental effects on the coating itself if not properly applied. Cathodic disbondment testing can measure a coating's su...

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Bibliographic Details
Published inMaterials performance Vol. 58; no. 1; pp. 30 - 35
Main Authors Weber, Grace, Merten, Bobbi Jo, Torrey, Jessica D
Format Magazine Article
LanguageEnglish
Published Houston NACE International 01.01.2019
Subjects
Adhesion tests
Buried structures
Cathodic coating (process)
Cathodic polarization
Cathodic protection
Coating effects
Copper
Corrosion
Corrosion prevention
Electrode polarization
Electrodes
Infrastructure
Protective coatings
Steel structures
Water supply systems
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Summary:Protective coatings and cathodic protection (CP) are commonly used together as a means of corrosion defense for buried or immersed metallic structures. However, CP can have detrimental effects on the coating itself if not properly applied. Cathodic disbondment testing can measure a coating's susceptibility to loss of adhesion due to cathodic polarization. This research evaluated the new standard, NACE International TM0115, "Cathodic Disbondment Test for Coated Steel Structures under Cathodic Protection," side by side with ASTM G8, "Standard Test Methods for Cathodic Disbonding of Pipeline Coatings." The article highlights each method's strengths and challenges regarding testing of coatings for water infrastructure corrosion control.
ISSN:0094-1492