- Author
-
Nguyen, T.
|
Lin, C.
- Title
- In-Situ Measurement of Chloride Ion at the Coating/Metal Interface.
- Coporate
- National Institute of Standards and Technology, Gaithersburg, MD
- Journal
-
Journal of Adhesion,
Vol. 33,
241-252,
1991
- Book or Conf
- Ahesion Society, Inc. Annual Meeting, 13th. February 19-21, 1990,
Savannah, GE,
1991
- Keywords
-
corrosion
|
ion selective microelectrodes
|
analytical instrumentation
|
blister formation
|
steels
|
surfaces
- Abstract
- One of the main reasons for the lack of a complete understanding of corrosion and adhesion failures of a coated metal is the lack of analytical instrumentation to probe the behaviors of corrosive agents at the coating/metal interface. We have developed a procedure based on microelectrodes for studying in situ the behavior of chloride ions at a coating/metal interface. The procedure requires an attachment of a double-barreled Cl ion-selective microelectrode at the coating/metal interface, thus allowing direct measurements of Cl concentration changes at localized areas under a coating. The procedure provided very useful information for mechanistic studies of corrosion under coatings, as well as for transport studies of Cl ions through a coating. The procedure should also be useful for studying the roles of Cl in localized corrosion.