镍-磷-碳化硼化学复合镀层的研制

电镀与涂饰 , 2011, 30(6): 18-21.

镍-磷-碳化硼化学复合镀层的研制

^1, , ^2, , ^3, , ^4, , ^5,

1.Materials Division, School of Advanced Sciences, VIT University, Vellore-632014, Tamilnadu, India

2.Design Division, School of Mechanical and Building Sciences, VIT University, Vellore-632014, Tamilnadu, India

3.IMF Division, Central Electrochemical Research Institute (CECRI), Karaikudi-630006, Tamilnadu, India

4.Centre for Multifunctional Materials, Kalasalingam University, Tamilnadu, India

5.Manufacturing Division, School of Mechanical and Building Sciences, VIT University, Vellore, Tamilnadu, India

关键词：化学镀 , 镍磷合金 , 碳化硼 , 复合镀层 , 耐蚀性 , 显微硬度 , 耐磨性

Development of electroless Ni-P-B 4C composite coatings

KARTHIKEYAN S ^1, , VENKATACHALAM G ^2, , SRINIVASAN K N ^3, , VASUDEVAN T ^4, , NARAYANAN S ^5,

1.Materials Division, School of Advanced Sciences, VIT University, Vellore-632014, Tamilnadu, India

2.Design Division, School of Mechanical and Building Sciences, VIT University, Vellore-632014, Tamilnadu, India

3.IMF Division, Central Electrochemical Research Institute (CECRI), Karaikudi-630006, Tamilnadu, India

4.Centre for Multifunctional Materials, Kalasalingam University, Tamilnadu, India

5.Manufacturing Division, School of Mechanical and Building Sciences, VIT University, Vellore, Tamilnadu, India

Keywords： electroless plating , nickel-phosphorus alloy , boron carbide , composite coating , corrosion resistance , microhardness , wear resistance

在由碳酸镍15 g/L、次磷酸32 mL/L、次磷酸钠15 g/L、乳酸32mL/L、乙酸189/L、丙酸3mL/L、二甲胺1.7g/L及碳化硼(即B4C)0～25 g/L组成的稳定镀液中,采用化学镀的方法在低碳钢上制备了Ni-P-B4C复合镀层.其显微硬度采用韦氏硬度法测量,耐磨性用Taber磨耗试验机测量,微观形貌和组织采用扫描电镜和X射线衍射进行分析,耐蚀性以动电位极化及电化学阻抗谱测定.碳化硼的掺入提高了镍-磷合金基体的显微硬度、耐磨性和耐蚀性.Ni-P-B4C复合镀层颗粒粗大,具有爆米花式组织结构.

Ni-P-B4C composite coatings were prepared on mild steel by electroless plating from a stable bath containing nickel carbonate 1 5 g/L,hypophosphorous acid 32 mL/L,sodium hypophosphite 15 g/L,lactic acid 32 mL/L, acetic acid 18 g/L,propionic acid 3 mL/L,dimethylamine 1.7 g/L,and boron carbide(B4C)particles 0-25 g/L.The microhardness of the composite coatings was examined by Vickers tester,the wear resistance by Taber abrasion tester, the microscopic morphology and structure by SEM and X-ray diffraction,and the corrosion resistance by potentiodynamic polarization and electrochemical impedance spectroscopy.The incorporation of B4C increases the microhardness,wear resistance,and corrosion resistance of the Ni-P alloy matrix.The Ni-P-B4C composite coating features a popcorn-like structure with coarse-grained composite particles.

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