钛钢复合板在模拟海水中的表面耐蚀性能研究  

Study on Surface Corrosion Resistance of Titanium Steel Clad Plate in Simulated Seawater

作　　者：黄羚惠 张伯君 Huang Linghui;Zhang Bojun(Nanjing Boiler and Pressure Vessel Inspection Institute,Nanjing 210019,China)

机构地区：[1]南京市锅炉压力容器检验研究院,江苏南京210019

出　　处：《炼油与化工》2024年第1期22-25,共4页Refining And Chemical Industry

摘　　要：采用极化曲线和交流阻抗测试方法,对比分析了爆炸钛钢复合板、增材制造钛钢复合板和去应力增材制造钛钢复合板在模拟海水的3.5%NaCl溶液中的表面耐蚀性能。研究结果表明,钛钢复合板表面钛覆层在3.5%的NaCl溶液中会发生电化学腐蚀,在电化学腐蚀过程中钛覆层表面生成1层稳定的氧化膜,提高其耐蚀性;增材制造复合板和去应力增材制造复合板的腐蚀电流密度和腐蚀速率均低于爆炸复合板,耐蚀性能更优;去应力退火能消除复合板内应力,提高增材制造复合板的耐蚀性能。The surface corrosion resistance of different titanium steel clad plates in simulated seawater solution of 3.5%NaCl were compared and analyzed by polarization curve and alternating-current impedance methods.Results show that titanium layer of the clad plate is electrochemically corroded in 3.5%NaCl solution.A stable oxide film,which will improve the corrosion resistance,is formed on the surface of titanium layer during the electrochemical corrosion process;Both corrosion current density and corrosion rate of additive manufacturing clad plate are lower than those of explosive clad plate,implying better corrosion resistance;Corrosion resistance of the additive manufacturing clad plate can be enhanced by stress relieving annealing to eliminate internal stress.

关 键 词：钛钢复合板 爆炸焊接 增材制造 腐蚀电流密度 腐蚀速率 

分 类 号：TG172.5[金属学及工艺—金属表面处理]