Abstract
Anodic polarization measurements in and in were made on an 11 Cr‐12 Ni martensitic stainless steel in the as‐rolled, as‐quenched, and quenched and tempered conditions. Structural changes on tempering between 100° and 600°C were evaluated by hardness measurements, light metallography, and transmission electron microscopy. The basic shape of the anodic polarization curves was not significantly affected by cold work (75% reduction) or by the carbide precipitation, recovery and recrystallization which occurred on tempering. The critical potential for pitting was unaffected by tempering and chloride addition. The primary passivation potential became more active on tempering above 300°C for 1 hr. A 600°C temper, accompanied by significant recrystallization, resulted in severe transpassive region pitting when the steel was polarized in the presence of Cl−.
Published Version
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