Corrosion monitoring of iron, protected by an organic coating, with the aid of impedance measurements

Journal Article · Sat Sep 01 04:00:00 EDT 1984 · J. Electrochem. Soc.; (United States)

DOI:https://doi.org/10.1149/1.2116009· OSTI ID:6216728

Hubrecht, J; Piens, M; Vereecken, J

The ac impedance measurement has proved to be a useful electrochemical technique for mainly qualitative studies of electrochemical and corrosion systems. Even for complicated systems such as coated metals in corrosive environments this technique has been used with success. The system chosen for the present study is an ARMCO iron plate, coated with a SrCrO/sub 4/-pigmented styrene acrylic polymer, and immersed for several weeks in an aqueous NaCl solution. Impedance measurements analyze a system under test into its constituting phenomena. The dependence of system parameters on coating layer thickness, NaCl concentration, and pigmentation of the coating during the immersion time provides insight into the corrosion and protection mechanisms at the coating/metal interface, besides the behavior of the coating itself.

• Research Organization: Department of Metallurgy and Electrochemistry, Faculteit Toegepaste Brussel
• OSTI ID: 6216728
• Journal Information: J. Electrochem. Soc.; (United States), Journal Name: J. Electrochem. Soc.; (United States) Vol. 131:9; ISSN JESOA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360105* -- Metals & Alloys-- Corrosion & Erosion
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400 -- Electrochemistry
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISTRY
CHROMIUM COMPOUNDS
CHROMIUM OXIDES
COATINGS
CORROSION
CORROSION PROTECTION
CORROSION RESISTANCE
ELECTRIC IMPEDANCE
ELECTROCHEMISTRY
ELEMENTS
IMPEDANCE
IRON
MEASURING METHODS
METALS
MONITORING
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE
PROTECTIVE COATINGS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS