期刊
CORROSION SCIENCE
卷 55, 期 -, 页码 368-377出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2011.10.039
关键词
Stainless steel; Potentiostatic; Thermal cycling; Pitting corrosion; Welding
资金
- National Science Foundation of China [50871031, 51131008, 51134010, 51071049]
- Industrialization Project of Shanghai New and High technology
Different welding thermal cycles from single-pass to triple-pass were performed on two kinds of 2304 duplex stainless steel through Gleebe thermal-mechanical simulator. The corresponding microstructure was observed, while the pitting corrosion resistance was investigated in 1.0 M NaCl by potentiostatic critical pitting temperature (CPT). The results showed that single-pass welding deteriorated microstructure and pitting corrosion resistance significantly. As the welding pass increased, the ferrite content decreased and CPT increased. However, CPT was still lower than that of the base metal. Nitride precipitated at the boundary between ferrite and austenite phase for low-alloyed 2304 after the single-pass welding thermal cycle. (C) 2011 Elsevier Ltd. All rights reserved.
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