pH对化学复合镀镍–磷–聚四氟乙烯性能的影响

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英文篇名：Effect of pH on properties of electrolessly plated nickel–phosphorus–polytetrafluoroethylene composite coating 作者：李富军 ; 叶涛 ; 方舒 ; 张厚 ; 刘定富 英文作者：LI Fu-jun;YE Tao;FANG Shu;ZHANG Hou;LIU Ding-fu;School of Chemistry and Chemical Engineering, Guizhou University; 关键词：镍–磷合金 ; 聚四氟乙烯 ; 化学复合镀 ; 酸度 ; 耐蚀性 ; 显微硬度 ; 摩擦因数 英文关键词：nickel–phosphorus alloy;;polytetrafluoroethylene;;electroless composite plating;;acidity;;corrosion resistance;;microhardness;;coefficient of friction 中文刊名：DDTL 英文刊名：Electroplating & Finishing 机构：贵州大学化学与化工学院; 出版日期：2019-03-15 出版单位：电镀与涂饰 年：2019 期：v.38;No.335 基金：2017年贵州大学研究生创新基金(研理工2017003) 语种：中文; 页：DDTL201905005 页数：4 CN：05 ISSN：44-1237/TS 分类号：23-26

摘要

考察了pH对45钢上化学复合镀Ni–P–聚四氟乙烯(PTFE)沉积速率和镀层孔隙率、磷含量、表面形貌、耐蚀性、显微硬度和摩擦因数的影响。镀液组成和工艺条件为:NiSO_4·6H_2O 25 g/L,NaH_2PO_2·H_2O 30 g/L,无水乙酸钠20 g/L,柠檬酸20 g/L,硫脲2 mg/L,氟碳型表面活性剂18 mg/L,PTFE 1.0 g/L,温度85℃,时间1 h。pH为5.0时,沉积速率为15.93μm/h,所得为高磷(质量分数8.34%)复合镀层,其显微硬度为163.3 HV,摩擦因数0.25,能耐中性盐雾腐蚀24.5 h。
        The effect of pH on the deposition rate,porosity,phosphorus content,surface morphology,corrosion resistance,microhardness,and friction coefficient of electrolessly plated Ni–P–PTFE(polytetrafluoroethylene)composite coating on 45 steel substrate was studied in a bath composed of NiSO_4·6H_2O 25 g/L,NaH_2PO_2·H_2O 30 g/L,anhydrous sodium acetate 20 g/L citric acid 20 g/L,thiourea 2 mg/L,and fluorocarbon surfactant 18 mg/L at 85℃ for 1 h.The deposition rate was 15.93μm/h when the pH was 5.0,and the composite coating obtained thereat had a high phosphorus content(8.34wt.%),a microhardness of 163.3 HV,and a friction coefficient of 0.25,and was able to endure neutral salt spray corrosion for 24.5 h.

引文

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