文献类型：期刊文献

英文题名：Effect of stress and strain on corrosion resistance of duplex stainless steel

作者：Yang, Jingqiang[1];Wang, Qiongqi[1];Guan, Kaishu[1]

机构：[1]E China Univ Sci & Technol, Sch Mech Engn, Minist Educ, Key Lab Safety Sci Pressurized Syst, Shanghai 200237, Peoples R China

年份：2013

卷号：110

起止页码：72

外文期刊名：INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING

收录：;EI(收录号：20133916773761);WOS:【SCI-EXPANDED(收录号:WOS:000325595100013)】；

基金：The author wishes to thank the financial support provided by National Nature Science Foundation of China (Grant No. 51075148) and provided by the State Bureau of Quality and Technical Supervision of China (201110029).

语种：英文

外文关键词：Duplex stainless steel; Polarization; Pitting corrosion; Effects of stress; Effects of strain

摘要：The interplay of the mechanical and electrochemical phenomena has been a subject of active research. In this paper, corrosion resistance studies about SAF2205 and SAF2507 duplex stainless steel were carried out under elastic stress applied (100 MPa, 300 MPa, 500 MPa) and pre-strain (5%, 10%, 15%) in 3.5% NaCl and 2 mol/L HCl solution. Potentiodynamic anodic polarization study revealed that corrosion resistance of SAF2205 duplex stainless steel decreases slightly with increasing of elastic stress level and noticeably with increasing of pre-strained level. Scanning electron microscopy investigation on surface of the electrochemical tested SAF2205 duplex stainless steel samples indicated that pitting is always located in austenite grains when pre-strain level is below 5% (including different elastic stress level) and located on intersection of ferrite and austenite grain when pre-strain level is above 5%. For SAF2507 duplex stainless steel, elastic stress and pre-strain have no effect on general corrosion and pitting corrosion. Based on deformation mechanism of duplex structure and the relationship of mechanical load and corrosion potential, Pitting corrosion behavior of duplex stainless steel is explained and discussed. (C) 2013 Elsevier Ltd. All rights reserved.