TY - JOUR
AU1 - Wang, Xiangyu
AU2 - He, Pei
AU3 - Zhou, Qinglong
AU4 - Zhou, Qingyuan
AU5 - Cheng, Manlang
AU6 - Sun, Yangting
AU7 - Jiang, Yiming
AU8 - Jiang, Laizhu
AU9 - Li, Jin
AB - The purpose of this study is to investigate the intergranular corrosion (IGC) susceptibility of a nitrogen-containing austenitic stainless steel QN2109. The intergranular corrosion (IGC) susceptibility of a nitrogen-containing austenitic stainless steel QN2109 was investigated.Design/methodology/approachThe double-loop electrochemical potentiodynamic reactivation (DL-EPR) tests were carried out. Scanning electron microscopy and atomic force microscopy were used to characterize the microstructure.FindingsThe optimized test condition for QN2109 was 1 M H2SO4 + 0.01 M NH4SCN at 40°C. The nose temperature of the temperature–time–sensitization (TTS) curve of QN2109 plot was approximately 750°C. Moreover, the IGC susceptibility started to appear at approximately 120 min. The Cr-depletion zone of QN2109 was generated by the formation of M23C6 rather than by the addition of nitrogen. The depth–width ratio of the grain boundaries after the DL-EPR tests decreased as the aging temperature increased. The degree of Cr depletion and size of the Cr-depletion zone at the grain boundary were reflected by the degree of sensitization and depth–width ratio, respectively.Originality/valueThe optimized test condition for DL-EPR tests of a nitrogen-containing austenitic stainless steel QN2109 was investigated. The TTS curve of QN2109 was first plotted to avoid IGC failure. The morphology of the Cr-depletion zone was reflected by the depth–width ratio.
TI - Investigation on intergranular corrosion susceptibility of a nitrogen-containing austenitic stainless steel QN2109 by optimized DL-EPR tests
JF - Anti-Corrosion Methods and Materials
DO - 10.1108/acmm-09-2022-2700
DA - 2023-02-09
UR - https://www.deepdyve.com/lp/emerald-publishing/investigation-on-intergranular-corrosion-susceptibility-of-a-nitrogen-gEFH8QaA07
SP - 45
EP - 52
VL - 70
IS - 2
DP - DeepDyve
ER -