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.
作者
胡毓
杜见第
李婷
丁冬雁
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)
出处
《腐蚀科学与防护技术》
CAS
CSCD
北大核心
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
关键词
阴极保护
17-4PH不锈钢
铁基牺牲阳极
电化学性能
cathodic protection
17-4PH stainless steel
Fe-based sacrificial anode
electrochemical property
