Effect of microstructure on the pitting susceptibility of a martensitic-ferritic stainless steel: A corrosion-metallurgical study
RN Carvalho, BCR Troconis, G Pioszak, V Ynciarte… - Corrosion …, 2022 - Elsevier
Corrosion Science, 2022•Elsevier
The relationship between microstructure, composition and the localized corrosion resistance
of a low carbon Cr-Ni-Mo martensitic-ferritic stainless steel was investigated. Four heat
treatments were selected to examine the effect of varying tempered Martensitic-Ferritic
microstructures on localized corrosion susceptibility. The pitting potential for each heat
treatment was determined in deaerated 192 g/L NaCl electrolyte saturated with CO 2 (pH:
3.8) at 65° C. Austenite reversion and other microstructural transformations associated with …
of a low carbon Cr-Ni-Mo martensitic-ferritic stainless steel was investigated. Four heat
treatments were selected to examine the effect of varying tempered Martensitic-Ferritic
microstructures on localized corrosion susceptibility. The pitting potential for each heat
treatment was determined in deaerated 192 g/L NaCl electrolyte saturated with CO 2 (pH:
3.8) at 65° C. Austenite reversion and other microstructural transformations associated with …
Abstract
The relationship between microstructure, composition and the localized corrosion resistance of a low carbon Cr-Ni-Mo martensitic-ferritic stainless steel was investigated. Four heat treatments were selected to examine the effect of varying tempered Martensitic-Ferritic microstructures on localized corrosion susceptibility. The pitting potential for each heat treatment was determined in deaerated 192 g/L NaCl electrolyte saturated with CO2 (pH: 3.8) at 65 °C. Austenite reversion and other microstructural transformations associated with tempering had a detrimental effect on the pitting potential. The resulting chemical and structural inhomogeneities decreased the pitting potential.
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