Dissolution and passivation kinetics of Fe-Cr-Ni alloys during localized corrosion

Conference · Sat Jan 01 00:00:00 EST 1983

OSTI ID:6454029

Newman, R C; Isaacs, H S

An artifical pit technique has been used to study the anodic and cathodic behavior of Fe-Cr-Ni alloys during localized corrosion in neutral chloride solutions. The active dissolution kinetics have been determined as a function of the concentration of the localized environment, and the conditions for passivation established. Platinum microelectrodes have been used to analyze the pit solutions. The cathodic behavior of a pit on type 304L stainless steel is dominated by copper ions dissolved in the pit. A high purity Fe-Cr-Ni alloy behaves like stainless steel if copper is separately dissolved in the pit environment. The variation of dissolution rate with concentration of corrosion products is used to show that localized corrosion can involve as many as five diffusion-coupled steady states. The stability of these states is discussed. 6 figures.

• Research Organization: Brookhaven National Lab., Upton, NY (USA)
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 6454029
• Report Number(s): BNL-32796; CONF-830534-1; ON: DE83010430
• Resource Relation: Conference: 5. international symposium on passivity, Bombannes, France, 30 May 1983
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CHROMIUM-NICKEL STEELS
CORROSION
STAINLESS STEEL-304L
AQUEOUS SOLUTIONS
CHEMICAL REACTION KINETICS
CHLORIDES
COPPER
CORROSION PRODUCTS
DISSOLUTION
PITTING CORROSION
ALLOYS
CHEMICAL REACTIONS
CHLORINE COMPOUNDS
CHROMIUM ALLOYS
CHROMIUM STEELS
CORROSION RESISTANT ALLOYS
DISPERSIONS
ELEMENTS
HALIDES
HALOGEN COMPOUNDS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
KINETICS
MATERIALS
METALS
MIXTURES
NICKEL ALLOYS
REACTION KINETICS
SOLUTIONS
STAINLESS STEELS
STEELS
TRANSITION ELEMENTS
360105* - Metals & Alloys- Corrosion & Erosion