Ni-Cr alloy electrodepositing technology on Fe substrate and coating performance  

作　　者：许利剑 龚竹青 汤建新 贺全国 何农跃 杜晶晶 

机构地区：[1]School of Metallurgical Science and Engineering, Central South University [2]Green Packaging and Biological Nanotechnology Laboratory, Hunan University of Technology

出　　处：《Journal of Central South University of Technology》2007年第2期181-185,共5页中南工业大学学报（英文版）

基　　金：Project (59674025) supported by the National Natural Science Foundation of China

摘　　要：The Ni-Cr alloy electrodepositing technology on iron substrate in the chlorid-sulfate solution and the impacts of main processing parameters on coating composition were studied. The optimal Ni-Cr alloy electrodepositing conditions are that the cathode current density is 16 A/dm^2,the plating solution temperature is 30℃ and the pH value is 2.5. The bright, compact coating gained under the optimal conditions has good cohesion and 24.1% Cr content. The results show that the coating is composed of crystalline, the average grain size is 82 nm and the higher the Cr content of coating, the larger the rigidity, and the higher the corrosion resistance. The rigidity of coating reaches 78.6(HR30T) and the passivation area broadens to 1.4 V when the Cr content of coating is 24.1%.The Ni-Cr alloy electrodepositing technology on iron substrate in the chlorid-sulfate solution and the impacts of main processing parameters on coating composition were studied. The optimal Ni-Cr alloy electrodepositing conditions are that the cathode current density is 16 A/dm^2, the plating solution temperature is 30 ℃ and the pH value is 2.5. The bright, compact coating gained under the optimal conditions has good cohesion and 24.1% Cr content. The results show that the coating is composed of crystalline, the average grain size is 82 nm and the higher the Cr content of coating, the larger the rigidity, and the higher the corrosion resistance. The rigidity of coating reaches 78.6（HR30T） and the passivation area broadens to 1.4 V when the Cr content of coating is 24.1%.

关 键 词：ELECTRODEPOSITION PLATING Ni-Cr alloy corrosion resistance 

分 类 号：TG174[金属学及工艺—金属表面处理]