期刊
CORROSION SCIENCE
卷 94, 期 -, 页码 38-47出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2015.01.035
关键词
Stainless steel; Polarisation; Pitting corrosion; Intergranular corrosion
In this study the effect of brief heat treatments within the 650-850 degrees C range on pitting corrosion and intergranular corrosion resistance of a lean duplex stainless steel was investigated. Pitting potentials (Epkt.) and critical pitting temperature (CPT) were determined in sodium chloride solutions. The degree of sensitisation (DOS) to intergranular corrosion (IGC) was evaluated by DL-EPR method application. The most critical treatment conditions were observed at 650 degrees C and at 7.50 degrees C. A recovery of the pitting and IGC resistance of the studied lean duplex was noted at 850 degrees C due to the redistribution of chromium towards the depleted zones. (C) 2015 Elsevier Ltd. All rights reserved.
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