Electro-less plating nickel-phosphorus (EPNP) subject to various pretreatments and an external magnetic field, are prepared onto low carbon steel (LCS). The surface hardness (SH), fatigue life (FL) and corrosion behavior (CB) of Ni-P coated are respectively obtained using a nano-indenter and a high strain low cycle fatigue life (HSLCFL) and polarization test. The experimental outcome reveals that LCS substrates that are pretreated using the proposed acid mixture (25% H₂SO₄ + 5% HCl) roughening and activation allow good Ni-P films to be deposited. In terms of EPNP, as the P content decreases, the SH and FL increase. Specimens that a coated in a Ni–P film using an external magnetic field have better mechanical performance than those that are not produced in an external magnetic field. As the external magnetic field intensity is increased, the film thickness, SH and FL increase, the concentration of P decreases and thin grains are formed on the film surface. The specimens without using an external magnetic field that are coated with a Ni–P film exhibit better resistance to corrosion than the uncoated sample of LCS. However, the Ni–P film that is coated using an external magnetic field has higher SH, so it exhibits increased resistance to corrosion.

在低碳钢（LCS）上制备经过各种预处理和外部磁场的化学镀镍磷（EPNP）。Ni-P涂层的表面硬度（SH），疲劳寿命（FL）和腐蚀行为（CB）分别使用纳米压头和高应变低循环疲劳寿命（HSLCFL）和极化测试获得。实验结果表明，使用建议的酸混合物（25％H ₂ SO ₄ + 5％HCl）的粗糙化和活化作用可以沉积出良好的Ni-P膜。就EPNP而言，随着P含量的减少，SH和FL增加。样品表明，使用外部磁场在Ni-P膜中进行镀膜的机械性能要优于在外部磁场中未产生的机械性能。随着外部磁场强度的增加，膜厚，SH和FL增大，P的浓度减小，并且在膜表面形成细晶粒。与未涂覆的LCS样品相比，未使用外部磁场涂覆有Ni-P膜的样品显示出更好的耐腐蚀性。但是，使用外部磁场涂覆的Ni-P膜具有较高的SH，因此其耐蚀性增强。