钨酸钠含量对S135钢电沉积铁–镍–钨合金镀层的影响  

Effect of sodium tungstate content on iron–nickel– tungsten alloy coating electrodeposited on S135 steel

作　　者：陈孝文[1] 张德芬[1] 陈明礼[1] 李曾珍[1] 朱维[1] 王旭[1] 李红军[1] 黄健[1] 王宇[1] 

机构地区：[1]西南石油大学材料科学与工程学院,四川成都610500

出　　处：《电镀与涂饰》2014年第23期1001-1003,I0002,共4页Electroplating & Finishing

基　　金：四川省高等学校油气田材料重点实验室资助项目(13YQT025);西南石油大学校级开放实验重点资助项目

摘　　要：利用钨酸钠通过电沉积在S135高强度钻杆用钢表面制备了Fe-Ni-W合金镀层。采用极化曲线测量以及结合力、显微硬度、厚度等测试研究了Fe-Ni-W合金镀层的耐蚀性和机械性能，并利用X射线衍射分析了其结构。结果表明，在其他条件相同（即FeSO4·7H2O30g／L，NiSO4·6H2O40g／L，C6H8O7·H2O适量，添加剂YC-21～5g／L，pH6．5，温度70℃，电流密度4A／dm^2，时间1h）的情况下，改变钨酸钠的质量浓度（20～60g/L），所得镀层的性能也不相同。当钨酸钠质量浓度为50g／L时，镀层各种性能指标均达到最佳，镀层中主要含有Ni17W3和FeNi3等物相。Fe-Ni-W alloy coatings were prepared using sodium tungstate on the surface of S135 drill pipe steel through electrodeposition. The corrosion resistance and mechanical properties of the electrodeposited Fe-Ni-W alloy coatings were studied by polarization curve measurement as well as adhesion, microhardness, and thickness tests. The structures of the coatings were characterized by X-ray diffractometer. The results showed that the properties of Fe-Ni-W coating varies with the mass concentration of sodium tungstate ranging from 20 to 60 g/L while other conditions are the same, namely, FeSO4·7H2O 30 g/L, NiSO4·6H2O 40 g/L, C6H8O7·H2O as required, additive YC-2 1-5 g/L, pH 6.5, 70 ℃, current density 4 A/dm2, and time 1 h. The coating is mainly composed of Ni17W3 and FeNi3 phases and presents the best performance when the mass concentration of sodium tungstate is 50 g/L.

关 键 词：钢 铁-镍-钨合金 电镀 钨酸钠 结构 性能 

分 类 号：TG174.41[金属学及工艺—金属表面处理] TQ153.11[金属学及工艺—金属学]