Early growth of single pits in weak acidic chloride media and anion effects on solubility of salt in the pit anolyte

Journal Article · Fri Jul 01 04:00:00 EDT 1994 · Corrosion (Houston); (United States)

DOI:https://doi.org/10.5006/1.3294351· OSTI ID:7229452

Sugie, Y; Motooka, T; Fujii, S ^[1]

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1. Himeji Inst. of Tech. (Japan)

Single pits were created on microelectrodes of type 304 (UNS S30400) stainless steel (SS), and the early stage of pit growth was evaluated in weak acidic chloride (Cl[sup [minus]]) solutions. The effect of anions on pit growth also was evaluated. The current density from the pits was shown to be time dependent. Experimental results agreed well with values predicted by a model of corrosion-rate mediation by means of a diffusion-controlled precipitate dissolution process. Thus, it was concluded that the corrosion rate on the type 304 SS microelectrodes was mediated by mass transport in the weak Cl[sup [minus]] solutions.

• OSTI ID: 7229452
• Journal Information: Corrosion (Houston); (United States), Journal Name: Corrosion (Houston); (United States) Vol. 50:7; ISSN 0010-9312; ISSN CORRAK
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360105* -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
ANIONS
AUSTENITIC STEELS
CHARGED PARTICLES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
CHROMIUM ALLOYS
CHROMIUM-NICKEL STEELS
CORROSION
CORROSION RESISTANT ALLOYS
CURRENT DENSITY
HALIDES
HALOGEN COMPOUNDS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HIGH ALLOY STEELS
IONS
IRON ALLOYS
IRON BASE ALLOYS
KINETICS
MATERIALS
NICKEL ALLOYS
PITTING CORROSION
REACTION KINETICS
STAINLESS STEEL-304
STAINLESS STEELS
STEEL-CR19NI10
STEELS