Effects of Particulate Silica Coatings on Localized Corrosion Behavior of AISI 304SS under Atmospheric Corrosion Conditions | Zendy

Eiji Tada | Zendy; G. S. Frankel | Zendy

Open Access

Effects of Particulate Silica Coatings on Localized Corrosion Behavior of AISI 304SS under Atmospheric Corrosion Conditions

Author(s) -

Eiji Tada,

G. S. Frankel

Publication year - 2007

Publication title -

journal of the electrochemical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.258

H-Index - 271

eISSN - 1945-7111

pISSN - 0013-4651

DOI - 10.1149/1.2722535

Subject(s) - materials science , corrosion , galvanic cell , electrolyte , cathodic protection , metallurgy , layer (electronics) , open circuit voltage , relative humidity , pitting corrosion , coating , deposition (geology) , composite material , electrochemistry , chemistry , voltage , electrode , paleontology , physics , quantum mechanics , sediment , biology , thermodynamics

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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