A3钢表面化学镀Ni-P/Ni-Mo-P双层镀层  

Electroless Plating of Ni-P/Ni-Mo-P Bilayered Coating on A3 Steel

作　　者：孔琳 刘品潇[2] 孔斌 KONG Lin;LIU Pinxiao;KONG Bin(Nanyang Technician College,Nanyang 473000,China;Nanyang Institute of Technology,Nan-yang 473004,China;Beijing Star and Zhonggong Equipment Technology Co.,Ltd.,Beijing 100176,China)

机构地区：[1]南阳技师学院,河南南阳473000 [2]南阳理工学院,河南南阳473004 [3]北京星和众工设备技术股份有限公司,北京100176

出　　处：《电镀与精饰》2021年第1期25-30,共6页Plating & Finishing

基　　金：民生科技发展计划项目(182107000037)。

摘　　要：在A3钢表面制备了以Ni-P镀层为底层、Ni-Mo-P镀层为表层的双层镀层,测试了单层Ni-P镀层、Ni-P/Ni-Mo-P双层镀层的结合力、腐蚀速率和阻抗谱图,并表征分析了单层Ni-P镀层、Ni-P/Ni-Mo-P双层镀层的成分以及腐蚀前后的形貌。结果表明,单层Ni-P镀层和Ni-P/Ni-Mo-P双层镀层都与基体结合良好,且都呈较为平整的胞状形貌;单层Ni-P镀层和Ni-P/Ni-Mo-P双层镀层都属于中磷镀层,Ni-P/Ni-Mo-P双层镀层表面几乎没有孔洞,胞状物大小相对均一,孔隙率仅为0.6个/cm^2,明显低于单层Ni-P镀层;在一定周期内,单层Ni-P镀层和Ni-P/Ni-Mo-P双层镀层都能对A3钢起到较好的保护作用,从而减轻A3钢腐蚀。与单层Ni-P镀层相比,Ni-P/Ni-Mo-P双层镀层的耐腐蚀性能更好,能为A3钢提供更长效的防护。Ni-P/Ni-Mo-P bilayered coating with Ni-P coating as the bottom layer and Ni-Mo-P coating as the surface layer was prepared on the surface of A3 steel.The binding force,corrosion rate and imped⁃ance spectra of single-layer Ni-P coating and Ni-P/Ni-Mo-P bilayered coating were tested,and the com⁃position and morphology of single-layer Ni-P coating and Ni-P/Ni-Mo-P bilayered coating before and af⁃ter corrosion were characterized and analyzed.The results show that both the single-layer Ni-P coating and Ni-P/Ni-Mo-P bilayered coating have a good combination with the matrix and they all present rela⁃tively flat cellular morphology.Both the single-layer Ni-P coating and Ni-P/Ni-Mo-P bilayered coating be⁃long to the medium phosphorus coating,there are almost no holes on the surface of Ni-P/Ni-Mo-P bilay⁃ered coating,and the cellular substances are relatively uniform.The porosity of Ni-P/Ni-Mo-P bilayered coating is only 0.6 cm^−2,which is significantly lower than that of single-layer Ni-P coating.In a certain period,both the single-layer Ni-P coating and Ni-P/Ni-Mo-P bilayered coating can play a protective role in reducing the corrosion of A3 steel.Compared with single-layer Ni-P coating,Ni-P/Ni-Mo-P bilayered coating exhibits better corrosion resistance and can provide longer protection for A3 steel.

关 键 词：Ni-P/Ni-Mo-P双层镀层 单层Ni-P镀层 化学镀 腐蚀速率 腐蚀形貌 

分 类 号：TQ153[化学工程—电化学工业]