TY  - SER
AU  - Maier,B.
AU  - Frankel,G.S.
TI  - Pitting corrosion of silica-coated type 304 stainless steel under thin electrolyte layers
PY  - 2011///
CY  - 
PB  - 
N2  - Transcripción del resumen del autor. The pitting corrosion behavior of Type 304 (UNS S30400) stainless steel (SS) under an electrolyte droplet with a layer of silica particles on the surface was investigated using a Kelvin probe. Droplets of 2.5 M magnesium chloride (MgCl2) solution were placed on an electrophoretically silica-coated steel surface and exposed to a constant low relative humidity. As a result of water evaporation, the chloride concentration increased and pitting corrosion initiated, which was detected by a sudden drop in open-circuit potential. Metastable pits repassivated slower under the silica particle layer than on bare stainless steel. Pits on silica-coated Type 304 SS initiated within a narrow chloride concentration and time range unlike pits on bare Type 304 SS. Pit growth rate was not influenced by the silica layer, but the particles acted as diffusion barrier. A mechanism for pit growth under a layer of inert particles was proposed
ER  -