Role of alloyed molybdenum in austenitic stainless steels in the inhibition of pitting in neutral halide solutions

Journal Article · Wed Sep 01 04:00:00 EDT 1976 · Corrosion; (United States)

DOI:https://doi.org/10.5006/0010-9312-32.9.347· OSTI ID:7313390

Sugimoto, K; Sawada, Y

In the passive region of austenitic stainless steels alloyed with Mo, the formation of MoO/sub 4//sup 2 -/ ions can be expected in neutral halide solutions by the transpassive dissolution of Mo. It has been shown that MoO/sub 4//sup 2 -/ ions added to neutral NaCl solutions act as an effective inhibitor against pitting of austenitic stainless steels with and without Mo. The interaction between alloyed Mo in the steels and added MoO/sub 4//sup 2 -/ ions in the solutions is appreciable. It is likely that the inhibition of pit growth by the adsorption of MoO/sub 4//sup 2 -/ ions which are thought to result from the dissolution of the steels at the initial stage of pitting leads to increased pitting resistance of austenitic stainless steels containing Mo.

• Research Organization: Tohoku Univ., Sendai
• OSTI ID: 7313390
• Journal Information: Corrosion; (United States), Journal Name: Corrosion; (United States) Vol. 32:9; ISSN CORRA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360100* -- Metals & Alloys
ALLOYS
CHALCOGENIDES
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CORROSION
CORROSION INHIBITORS
CORROSION PROTECTION
CORROSION RESISTANT ALLOYS
HALIDES
HALOGEN COMPOUNDS
IRON ALLOYS
IRON BASE ALLOYS
METALLURGICAL EFFECTS
MOLYBDENUM COMPOUNDS
MOLYBDENUM OXIDES
OXIDES
OXYGEN COMPOUNDS
PITTING CORROSION
STAINLESS STEELS
STEELS
TRANSITION ELEMENT COMPOUNDS