Effect of microstructure on the pitting susceptibility of a martensitic-ferritic stainless steel: A corrosion-metallurgical study

被引：7
作者：
Carvalho, Ricardo N.
Troconis, Brendy C. Rincon
Pioszak, Greger
Ynciarte, Vinicio
Scully, John R.
机构：
[1] Pontifícia Universidade Católica de Minas Gerais, Previously at Vallourec Soluções Tubulares do Brasil, Av. Dom José Gaspar, 500, Coração Eucarístico, MG, Belo Horizonte
[2] Instituto SENAI de Inovação em Metalurgia e Ligas Especiais, Centro de Inovação e Tecnologia SENAI, Av. José Cândido da Silveira, 2000, Horto Florestal, MG, Belo Horizonte
[3] University of Texas at San Antonio, Department of Mechanical Engineering, One UTSA Circle, San Antonio, 78249, TX
[4] Previously at Center for Electrochemical Science and Engineering, Department of Materials Science and Engineering, University of Virginia, Charlottesville, 22904, VA
[5] Center for Electrochemical Science and Engineering, Department of Materials Science and Engineering, University of Virginia, Charlottesville, 22904, VA
来源：
CORROSION SCIENCE | 2022年 / 202卷
关键词：
Pitting; Microstructure; Corrosion; Stainless steel; Reversed austenite; Chi-phase; PASSIVE FILM STABILITY; CHI-PHASE-FORMATION; REVERSED AUSTENITE; MECHANICAL-PROPERTIES; RETAINED AUSTENITE; CU ADDITION; BEHAVIOR; KINETICS; TRANSFORMATION; TEMPERATURE;
D O I：
10.1016/j.corsci.2022.110277
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The relationship between microstructure, composition and the localized corrosion resistance of a low carbon CrNi-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 degrees 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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页数：14
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