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

Journal Article · Sat Sep 01 00:00:00 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), Vol. 131:9
• Country of Publication: United States
• Language: English

Related Subjects

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