(1. 长春工业大学 材料科学与工程学院，长春 130012；
2. 吉林大学 汽车材料教育部重点实验室，长春 130025)
摘 要:
关键字: MB8镁合金；电沉积；纳米复合镀层；纳米SiC
（1. College of Materials Science and Engineering, Changchun University of Technology, Changchun 130012, China;
2. Key Laboratory of Automobile Materials, Ministry of Education, Jilin University, Changchun 130025, China）
Abstract:Nano composite coatings were prepared on MB8 wrought magnesium alloy by electrodeposition with sulfate nickel as main salt. The microstructure of the composite coatings were observed with scanning electron microscopy and transmission electron microscopy, its phase compositions were analyzed with X-ray diffractometry, its microhardness was determined with microhardness meter, its abrasive resistance was tested by rapid abrasive test, and its polarization curve in 3.5% (mass fraction) sodium chloride solution was determined by electrochemical tester. The results show that nano composite coatings with uniform crystalline, dense structure and better corrosion resistance can be obtained on MB8 wrought magnesium alloy and its maximum microhardness reaches HV 682. Moreover, the abrasive resistance of the composite coatings is superior to that of the hard chromium coating, the corrosion potential is increased by 677 mV compared with base Mg alloy.
Key words: MB8 magnesium alloy; electrodeposition; nano composite coating; nano-SiC
