核电厂水池结构不锈钢覆面在模拟泄漏环境中的腐蚀性能研究

Study on the Corrosion Performance of Stainless Steel Cladding in Nuclear Power Plant Water Tank Structure in Simulated Leakage Environment

采用点蚀、晶间腐蚀、电化学和应力腐蚀的方法对核电厂水池结构304L不锈钢覆面在模拟泄漏环境中的腐蚀性能进行研究。结果表明,304L不锈钢在模拟泄漏环境中母材的耐点蚀能力略好于焊缝和热影响区,但比在水池内介质中更易于发生点蚀;在常规硼酸水浓度环境和模拟泄漏环境中304L不锈钢具有良好的抗晶间腐蚀和应力腐蚀能力。

The corrosion performance of 304L stainless steel cladding for nuclear power plant water pool structures in simulated leakage environments was studied using pitting,intergranular corrosion,electrochemistry,and stress corrosion methods.The results show that the pitting resistance of 304L stainless steel in the simulated leakage environment is slightly better than that of the weld seam and heat affected zone,but it is more prone to pitting corrosion than in the medium in the water tank;304L stainless steel has good resistance to intergranular corrosion and stress corrosion in conventional boric acid water concentration environments and simulated leakage environments.