SYMPOSIA PAPER Published: 01 January 1993
STP18082S

Electrochemical Impedance of Coated Metal Undergoing Loss of Adhesion

Source

A critical analysis of the concepts used to correlate parameters determined from electrochemical impedance spectra to the evaluation of the loss of adhesion of an organic coating from steel is made. In particular, the breakpoint method is called into question based on a theoretical analysis of the double layer capacitance of the coating/metal interface. A model for a coating undergoing disbonding about a macroscopic defect is described. The impedance of a fusion-bonded epoxy (FBE) pipeline coating about a large defect is considered in light of this model. The observations approach characteristics predicted by the model.

Author Information

Kendig, MW
Rockwell International Science Center, Thousand Oaks, CA
Jeanjaquet, S
Rockwell International Science Center, Thousand Oaks, CA
Lumsden, J
Rockwell International Science Center, Thousand Oaks, CA
Price: $25.00
Contact Sales
Related
Reprints and Permissions
Reprints and copyright permissions can be requested through the
Copyright Clearance Center
Details
Developed by Committee: G01
Pages: 407–427
DOI: 10.1520/STP18082S
ISBN-EB: 978-0-8031-5240-3
ISBN-13: 978-0-8031-1861-4