内蒙古电力技术2025，Vol.43Issue(3)：25-31,7.DOI:10.19929/j.cnki.nmgdljs.2025.0031
核电站海水双相不锈钢蝶板堆焊层腐蚀分析
Corrosion Analysis of Seawater Duplex Stainless Steel Butterfly Overlay Welding Layer in Nuclear Power Station
摘要
Abstract
Aiming at the corrosion failure of seawater butterfly valve near the heat exchanger of nuclear power station,the effects of welding materials,heat input,impurities and hydrogen introduction on the corrosion resistance of 2205 duplex stainless steel(DSS)welded joints are evaluated by means of microstructure observation,electrochemical test and corrosion immersion test.The experimental results show that the pitting corrosion resistance of the welded joint is lower than that of the base metal.The welding heat input has little effect on the microstructure and corrosion resistance of the 2205 DSS welded joint.The environmental conditions during welding and the actual service environment have a significant effect on the corrosion resistance of the 2205 DSS welded joint.The corrosion failure of the butterfly plate in the nuclear power station is the result of multiple factors.It is necessary to optimize the material and welding process under full consideration of the environmental impact,enhance the corrosion resistance of the 2205 DSS welded joint,and improve the safety and reliability of the key facilities of the nuclear power station.关键词
核电站/蝶板/腐蚀失效分析/2205双相不锈钢/焊接接头/耐蚀性能Key words
nuclear power station/butterfly plate/corrosion failure analysis/2205 duplex stainless steel(DSS)/welded joint/corrosion resistance分类
信息技术与安全科学引用本文复制引用
杨梦园,刘泽慧,刘明,韩姚磊,乔利杰,许立宁..核电站海水双相不锈钢蝶板堆焊层腐蚀分析[J].内蒙古电力技术,2025,43(3):25-31,7.基金项目
中广核—北科大先进能源材料与服役安全联合研发中心项目"2205双相不锈钢堆焊层耐海水腐蚀对策研究"(2022-0476) （2022-0476）
