铁基牺牲阳极对17-4PH不锈钢的阴极保护  

Fe-based Sacrificial Anodes for Cathodic Protection of 17-4PH Stainless Steel

作　　者：胡毓[1,2] 杜见第[1] 李婷[1] 丁冬雁[1] HU YU DU Jiandi LI Ting DING Dongyan(Institute of Electronic Materials and Technology, School of Materials Science and Engineering, Shanghai JiaoTong University, Shanghai 200240, China Siemens Corporate Technology, Shanghai 200082, China)

机构地区：[1]上海交通大学材料科学与工程学院,上海200240 [2]西门子研究院(中国),上海200082

出　　处：《腐蚀科学与防护技术》2016年第5期391-396,共6页Corrosion Science and Protection Technology

基　　金：国家重大科学仪器设备开发专项项目(2012YQ15000105)资助

摘　　要：采用两种铁基牺牲阳极材料(20CrMo和40CrMo)对17-4PH不锈钢进行阴极保护,通过恒电流实验和自放电实验评估这两种牺牲阳极的保护效果,并用扫描电镜(SEM)和能谱(EDS)分析17-4PH阴极实验后的表面形态和元素成分。结果表明:两种牺牲阳极对17-4PH不锈钢均有500 m V左右的驱动电位。20Cr Mo牺牲阳极具有比40Cr Mo更负的工作电位、更大的电流效率,20Cr Mo牺牲阳极表面均匀腐蚀。经过20Cr Mo阳极保护的17-4PH阴极表面形成的氧化产物含量更少。20Cr Mo对17-4PH不锈钢的保护效果更好。As sacrificial anode material for 17- 4PH stainless steel, the cathodic protection performance of two Fe-based alloys 20 Cr Mo and 40 Cr Mo was evaluated by means of galvanostatic test and self- discharge test. Then the surface morphology of 17- 4PH cathodes was characterized by scanning electron microscope（SEM） with energy dispersive spectrometer（EDS）. Experimental result indicates that both the 20 Cr Mo and 40 Cr Mo anodes had a driving voltage around 500 m V. The20 Cr Mo sacrificial anode presented much stable and negative working potential and uniform corrosion rather than 40 Cr Mo sacrificial anode. The 17-4PH cathode protected by 20 Cr Mo had less rust product on its surface. In other word, the 20 Cr Mo sacrificial anode has a better protective effect on17-4PH stainless steel.

关 键 词：阴极保护 17-4PH不锈钢 铁基牺牲阳极 电化学性能 

分 类 号：TG174.41[金属学及工艺—金属表面处理]