PDF《AZ91D 镁合金表面化学转化处理及镀镍》

而化学镀镍后,表面硬度 显著提高.其中,转化膜上沉积镍层的硬度最高. http://www.paper.edu.cn -6- 参考文献 [1] 刘永健,王印培.化学镀镍工艺对镀层耐蚀耐磨性的影响[J].腐蚀与防护,2001,22(7): 293~296. [2] 戴长松,吴宜勇,王殿龙.镁及镁合金的化学镀镍[J].兵器材料科学与工程,1997,20(4): 134~136. [3] 罗守福,胡文彬.铝、镁合金的化学镀镍[J].轻合金加工技术,1997,25(2): 28~29. [4] 吴纯素.化学转化膜[M].第一版,北京:化学工业出版社,1988. [5] ASTM B480-88. Standard Guide for preparation of magnesium and magnesium alloys for electroplating[M]. Annual Book of ASTM Standards, 2000, 2(5): 188. [6] M. A. Gonzalez-Nunez, C. A. Nunez-Lopez, P. Skeldon, G. E. Thompson. A non-chromate conversion coating for magnesium alloys and magnesium-based metal matrix composites[J]. Corrosion Science, 1995, 37(11): 1763~1772. Surface Chemical Treatment and Nickel Plating on AZ91D Megnesium Alloy Xu Yang,Qiu Xingwu,Ren Xin Department of Materials Science and Engineering, Liaoning technical university, Fuxin, Liaoning (123000) Abstract AZ91D alloys were used as the materials in this experiment. The directly electroless nickel plating, the stannate conversion processing and the electroless nickel plating on the surface of the magnesium alloys that have formed the stannate chemical conversion film on their surface were researched. The morphologies, anticorrosion ability and the hardness of plating of the magnesium alloys after chemical conversion processing and plating nickel were analysed by scanning electron microscope, salt droplet experiment, microhardness survey etc. The result of the experiment showed that, the conversion film unions with the substrate well, the conversion coating can avoid intense galvanic corrosion after the expiration of the plating, and enhanced the corrosion resistance of the plating. The nickel plating deposited on the conversion coating has high microhardness which could provide good protection for the magnesium alloys. Keywords: Magnesium Alloy, Corrosion Resistant, Chemical Conversion Coating, electroless Nickel Plating ........