Electroless nickel-plating on die cast magnesium alloy AZ91D

摘要：

Electroless nickel-plating on die cast magnesium alloy AZ91D was investigated.Growth of the electroless nickel-plating coating was characterized using scanning electron microscopy.Corrosion resistance of the coating was evaluated by open circuit potential and potentiodynamic polarization curves in 3.5％ (mass fraction) NaCl solution.The results show that plating deposition is initiated on the crevices and then spread onto primary α phase.The corrosion potentials for die cast magnesium alloy AZ91D and nickel-plating coating are about .1.45 V and .0.36 V (vs.SCE),respectively.No discoloration,cracks,blisters,or peeling appear by heat-quench test.The results show that the corrosion potential of Ni-P coating is increased by 1 000 mV and corrosion resistance for die cast magnesium alloy AZ91D is improved.The adhesion between the coating and the substrate is excellent.Electroless nickel plating is a promising method to enhance magnesium alloys resistance for attacking.

关键词： electroless nickel-plating die cast magnesium alloy corrosion resistance polarization

作者: JIA Su-qiu JIA Shu-sheng YAO Jun

作者单位: School of Materials Science and Engineering,Changchun University of Technology,Changchun 130012,Chin Key Laboratory of Automobile Materials,Ministry of Education,Jilin University,Changchun 130025,China

会议类型: 国际会议

会议名称: 2007年国际有色金属大会(International Conference of Nonfereous Materials 2007)(ICNFM)

会议地点: 长沙

会议语种:英文

在线出版日期: 2007-11-28（万方平台首次上网日期，不代表论文的发表时间）