热处理对Ni-B涂层耐腐蚀性能的影响  

Effect of Heat Treatment on Corrosion Resistance of Ni-B Coating

作　　者：孙万昌[1] 张磊 谭明锋[1] 丁晋[1] 

机构地区：[1]西安科技大学材料科学与工程学院,陕西西安710054 [2]中国船舶重工集团第十二研究所,陕西兴平713102

出　　处：《热加工工艺》2011年第18期146-147,152,共3页Hot Working Technology

基　　金：陕西省教育厅科研计划项目资助(11JK0824)

摘　　要：采用低温化学镀液相沉积技术,以45钢为基体材料,制备了Ni-B合金镀层。利用光学显微镜观察了镀层的微观形貌,借助X射线衍射仪分析了热处理前后Ni-B镀层相结构的变化,采用电化学极化曲线表征了热处理前后镀层的腐蚀过电位。结果表明:Ni-B镀层与45钢基体结合较好,界面连续、均匀、平整,表面形貌呈菜花状的胞状结构。NaBH4的添加量为0.9 g/L时,Ni-B镀层呈非晶态,Ni-B镀层的耐蚀性最好。热处理后,镀层由非晶态向晶态转变,镀层的耐蚀性下降。Electroless Ni-B alloy coating was prepared on medium carbon steel sheet using a low temperature electroless bath.The surface and cross-section morphologies of Ni-B alloy coating were observed with optical microscope.The influences of heat treatment on phase structure and corrosion resistance of the coating were studied.The results show that Ni-B coating shows a good adhesion to the substrate.The structure of as-plated Ni-B coating is amorphous,and the coating shows the best corrosion resistance.However,the corrosion resistance of Ni-B coating decreases after heat treatment.

关 键 词：化学镀 Ni-B涂层 热处理 耐蚀性 

分 类 号：TG174.4[金属学及工艺—金属表面处理]