镍钨磷合金电镀层的性能研究  

The Corrosion Resistance and Electrocatalytic Activity of Electroplated Ni-W-P Alloy Coating

作　　者：许云华[1] 牛立斌[1] 刘焕[1] 

机构地区：[1]西安建筑科技大学机电学院耐磨所,陕西西安710054

出　　处：《材料保护》2007年第7期5-7,共3页Materials Protection

摘　　要：通过对Ni-W-P合金电镀层在200℃、0.5h热处理后的XRD和SEM分析发现,不论镀态还是热处理态,镀层结构均为非晶态,且晶粒均匀,晶界清楚,热处理后晶粒略长大。在盐酸和硫酸介质中的耐蚀性测试结果表明,热处理后镀层的耐蚀性略高于镀态的耐蚀性;通过析氢性能测得镍基合金的电催化活性依次为:Ni-W-P>Ni-P>Ni-W>Ni。Ni-W-P alloy coating was prepared using electroplating.The resulting Ni-W-P alloy coating was characterized by means of X-ray diffraction and scanning electron microscopy.Moreover,the electrocatalytic behavior of the Ni-W-P alloy coating was investigated,while its corrosion resistance in hydrochloric acid and sulfuric acid was evaluated.It was found that both the as-deposited coating and the coating heated at 200 ℃ for 0.5 h had amorphous structure.The alloy coating was composed of fine grains and had distinctive crystal boundary,and the grain size slightly increased after heat treatment.Moreover,the heat-treated Ni-W-P alloy had better corrosion resistance than the as-deposited coating,and the electrocalytic activity of the alloy coating could be ranked as Ni-W-P > Ni-P > Ni-W > Ni.

关 键 词：Ni—W—P 电镀层 非晶态 耐蚀性 电催化活性 

分 类 号：TQ153.1[化学工程—电化学工业]