电刷镀镍对30Cr13钢耐腐蚀和力学性能的影响

Effect of electro-brush nickel plating on corrosion resistance and mechanical property of 30Cr13 steel

在30Cr13钢表面电刷镀镍以实现对钢构件的快速修复。采用扫描电子显微镜(SEM)和能谱仪(EDS)考察了电刷镀镍层的表面形貌和元素分布。通过动电位极化曲线测试、洛氏硬度测量及摩擦磨损试验对比了30Cr13钢电刷镀镍层前后的耐腐蚀性能和力学性能。结果表明,电刷镀镍层表面呈胞状结构,厚度可达20μm,与基体结合良好。与30Cr13钢基体相比,电刷镀镍层的腐蚀电位更正,腐蚀电流密度降低了1个数量级,即耐腐蚀性能更好。30Cr13钢和电刷镀镍层的洛氏硬度分别为34.09 HRC和45.72 HRC,电刷镀镍层的耐磨性比30Cr13钢好。

Electro-brush nickel plating was conducted on the surface of 30Cr13 steel for rapid repairing of steel component.The surface morphology and elemental distribution of electro-brush plated Ni coating were characterized by scanning electron microscopy(SEM) and energy-dispersive spectroscopy(EDS). The corrosion resistance and mechanical properties of 30Cr13 steel and Ni coating were compared by potentiodynamic polarization curve measurement, Rockwell hardness measurement, and friction and wear testing. The results showed that the electro-brush plated Ni coating was well-adhered to the substrate and featured a cellular structure with a thickness up to 20 μm. The corrosion potential of Ni coating was more positive than that of 30Cr13 steel, and its corrosion current density was one order of magnitude lower than that of 30Cr13steel, indicating that Ni coating had better corrosion resistance than 30Cr13 steel. The Rockwell hardness of 30Cr13 steel and electro-brush plated Ni coating was 34.09 HRC and 45.72 HRC, respectively. The nickel coating had better wear resistance than 30Cr13 steel.