Abstract: Amorphous Ni-P coating, Ni-W-P coating and Ni-Mo-P coating with almost the same P content that means almost the same amorphous degree were prepared through electroless plating method. DSC tests were carried out to obtain the exothermic peaks of the three amorphous coatings and the corresponding apparent crystallization activation energy. Results showed that the addition elements W and Mo could improve the thermal stability of amorphous Ni-P coating. Then the three kinds of amorphous coatings were subjected to heat treated at 200 ℃-4 h, 300 ℃-4 h and 400 ℃-4 h respectively. By analyzing the XRD curves of these annealed coatings, it was further confirmed that elements W and Mo could improve the thermal stability of Ni-P coating. The polarization curves of three amorphous coatings in 3.5wt% sodium chloride solution were mea-sured by electrochemical workstation. The corrosion parameters of these coatings were calculated by Tafel method. Results showed that the corrosion resistance of amorphous Ni-P coating could be improved by adding elements W and Mo. The surface morphology of the three amorphous coatings after corrosion were analyzed by SEM method, and the corrosion products were analyzed through XPS method. It was speculated that the reason for corrosion resistance improvement of the amorphous Ni-P coating by W and Mo elements was the oxides of W and Mo, which were formed on the coatings surface. These oxides could effectively prevent the perforation corrosion of chloride ions.
赵冠琳, 刘树帅, 吴东亭, 王新洪, 邹勇. 元素W与Mo对非晶Ni-P镀层热稳定性和耐腐蚀性能的影响[J]. 材料导报, 2023, 37(7): 21070071-7.
ZHAO Guanlin, LIU Shushuai, WU Dongting, WANG Xinhong, ZOU Yong. Effect of W and Mo on Thermal Stability and Corrosion Resistance of Amorphous Ni-P Coating. Materials Reports, 2023, 37(7): 21070071-7.
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2023, Vol. 37 
