非晶NiP⁃WC复合镀层的耐蚀性研究

Study on the Corrosion Resistance of Amorphous NiP⁃WC Composite Coating

张新富 何波 周亮 贺勇 倪黎 苏铭滨 刘伟 陈吉

Xinfu ZHANG Bo HE Liang ZHOU Yong HE Li NI Mingbin SU Wei LIU Ji CHEN

辽宁石油化工大学 机械工程学院，辽宁 抚顺 113001 中国石化催化剂有限公司，北京 100029 中国石化催化剂 有限公司 长岭分公司，湖南 岳阳 414012 辽宁石油化工大学 土木工程学院，辽宁 抚顺 113001

School of Mechanical Engineering，Liaoning Petrochemical University，Fushun Liaoning 113001，China Sinopec Catalyst Co. ，Ltd. ，Beijing 100029，China Changling Branch of Sinopec Catalyst Co. ，Ltd. ，Yueyang Hunan 414012，China School Civil Engineering，Liaoning Petrochemical University，Fushun Liaoning 113001，China

采用化学镀的方法，在紫铜基体上制备非晶NiP?WC（碳化钨）复合镀层，研究了镀层在质量分数为3.5%的NaCl溶液以及浓度为1 mol/L的盐酸溶液中的耐蚀性；利用扫描式电子显微镜（SEM）、能谱仪（EDS）EDS、X射线衍射仪（XRD），对镀层的表面形貌、成分及微观结构进行了表征；采用动电位极化和阻抗谱对镀层的耐蚀性进行了分析。结果表明，在质量分数为3.5%的NaCl溶液中，NiP?WC镀层的自腐蚀电位较非晶NiP镀层正移约111 mV，自腐蚀电流密度减小约68.8%，电荷转移电阻提高约6.7倍；在浓度为1 mol/L的盐酸溶液中浸泡，NiP?WC镀层较NiP镀层的腐蚀速率下降约1个数量级，表明均匀分布的WC粒子可以显著提高非晶NiP的耐蚀性。

An amorphous NiP?WC composite coating was prepared on a copper substrate by chemical plating. The corrosion resistance of the coating was studied in a NaCl solution with a mass fraction of 3.5% and a 1 mol/L hydrochloric acid solution. The surface morphology, composition, and microstructure of the coating were characterized by scanning electron microscopy (SEM), Energy dispersive spectrometer （EDS）, and X?ray diffraction (XRD). The corrosion resistance of the coating was analyzed by potentiodynamic polarization and impedance spectroscopy. The results show that in a NaCl solution with a mass fraction of 3.5%, the self corrosion potential of NiP?WC coating shifted approximately 111 mV higher as compared to amorphous NiP coating, resulting in a decrease of approximately 68.8% in self corrosion current density and an increase of approximately 6.7 times in charge transfer resistance. Soaking in 1 mol/L hydrochloric acid solution, the corrosion rate of NiP?WC coating decreased by about an order of magnitude compared to NiP coating, indicating that uniformly distributed WC particles can significantly improve the corrosion resistance of amorphous NiP.

辽宁省教育厅科学技术研究项目(L2017LQN023);中国石化催化剂有限公司项目(SCC?B?2023?033)

10.12422/j.issn.1672-6952.2025.01.012