000			01506nab a2200193 4500
005			20260520000924.0
008			260224s2011 xxu
245	0	0	_aPitting corrosion of silica-coated type 304 stainless steel under thin electrolyte layers
260			_a _b _cmar. 2011
270			_a01/04/2011 ; 01/04/2011
300			_a12 p. ; 035004
520			_aTranscripción 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.
581			_a3
773	0		_tCorrosion _g67
942			_cARTICULO
100	1		_aMaier, B. _944822
100	1		_aFrankel, G.S. _927480
999			_c174319 _d174319