Local electrochemistry of pitting corrosion in stainless steels

Conference · Sun Jan 01 04:00:00 EST 1984

OSTI ID:5995195

Isaacs, H S; Newman, R C

The following features of localised corrosion in stainless steels are described and illustrated: diffusion-controlled dissolution and salt films; active dissolution kinetics and the effects of alloying additions such as Mo; coupling of active dissolution and diffusion; the pitting potential; repassivation and the protection potential. In addition, the coupling of a pit anode and a passive surface is described with reference to neutral oxygenated chloride solutions. In the initiation stage of pitting the pit draws current mostly from the capacitance of the passive film, not from the oxygen reduction reaction. Some implications of these aspects are discussed.

• Research Organization: Brookhaven National Lab., Upton, NY (USA); University of Manchester Inst. of Science and Technology (UK). Corrosion and Protection Centre
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 5995195
• Report Number(s): BNL-35432; CONF-8410207-1; ON: DE85005207
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360105* -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
CHEMICAL REACTIONS
CHEMISTRY
CHROMIUM ALLOYS
CORROSION
CORROSION RESISTANT ALLOYS
COUPLING
DIFFUSION
DISSOLUTION
ELECTROCHEMISTRY
FILMS
IRON ALLOYS
IRON BASE ALLOYS
PASSIVATION
PITTING CORROSION
SALTS
STAINLESS STEELS
STEELS