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

作　　者：张新富 何波 周亮 贺勇 倪黎 苏铭滨 刘伟[4] 陈吉[1] ZHANG Xinfu;HE Bo;ZHOU Liang;HE Yong;NI Li;SU Mingbin;LIU Wei;CHEN Ji(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)

机构地区：[1]辽宁石油化工大学机械工程学院,辽宁抚顺113001 [2]中国石化催化剂有限公司,北京100029 [3]中国石化催化剂有限公司长岭分公司,湖南岳阳414012 [4]辽宁石油化工大学土木工程学院,辽宁抚顺113001

出　　处：《辽宁石油化工大学学报》2025年第1期90-96,共7页Journal of Liaoning Petrochemical University

基　　金：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,SCC-B-2023-037)。

摘　　要：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,NiPWC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.

关 键 词：化学镀 WC粉末 耐蚀性 浸泡 

分 类 号：TQ153.1[化学工程—电化学工业]