Effects of Particulate Silica Coatings on Localized Corrosion Behavior of AISI 304SS under Atmospheric Corrosion Conditions
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Date
2007
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Abstract
The effects of a coating of silica particles on the localized corrosion behavior of AISI 304 stainless steel (304SS) during drying of thin electrolyte layers in controlled relative humidity environments were investigated by measurements of the transients of open-circuit potential (OCP) and galvanic current. The silica coatings were composed of spherical silica particles and were deposited on 304SS by cathodic electrophoretic deposition. It was
confirmed that the silica layer worked very well as a host layer to soak up electrolyte solutions and that it remained
intact under wet and dry conditions. OCP and galvanic current transients indicated that the silica layer affected
propagation more than initiation of pitting corrosion. The propagation of pitting corrosion for silica-coated samples
was slower than for uncoated 304SS.
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Keywords
silica particles, AISI 304 stainless steel (304SS), open-circuit potential (OCP), galvanic current
Citation
Tada, Eiji; Frankel, G. S. "Effects of Particulate Silica Coatings on Localized Corrosion Behavior of AISI 304SS under Atmospheric Corrosion Conditions," Journal of The Electrochemical Society, v. 154, no. 6, 2007, pp. C318-C325.