摘要
在碳纤维(CFs)增强聚醚醚酮(PEEK)基体表面通过化学镀制备了镍磷合金镀层,研究了NiSO_(4)·6H_(2)O质量浓度、NaH_(2)PO2·H_(2)O质量浓度和镀液pH对镀层沉积速率及电磁屏蔽效能的影响,获得的最佳配方和工艺为:NiSO_(4)·6H_(2)O 25 g/L,NaH_(2)PO2·H_(2)O 30 g/L,乙酸钠20 g/L,柠檬酸钠10 g/L,乳酸30 mg/L,硫脲0.03 g/L,pH 6.1,温度80℃,时间120 min。利用扫描电镜、能谱仪、X射线衍射仪和显微硬度计表征了最佳工艺条件下所得镀层的表面和截面形貌、元素成分、物相结构以及显微硬度,通过冷热循环法测试了镀层的结合力,采用动电位极化曲线和电化学阻抗谱技术考察了镀层的耐蚀性,并测试了镀层的电磁屏蔽效能。结果表明,基材表面沉积了一层结合力强,厚度约为30μm,平均显微硬度为644.7 HV,磷质量分数为15.41%,且具有良好的耐蚀性和电磁屏蔽效能的结瘤状镍磷合金镀层。
Ni–P alloy coating was electrolessly deposited on carbon-fiber-reinforced polyether ether ketone(PEEK).The effects of the mass concentrations of NiSO_(4)·6H_(2)O and NaH_(2)PO2·H_(2)O as well as the bath pH on the deposition rate and electromagnetic interference(EMI)shielding effectiveness(SE)of the coating were studied.The optimal process parameters were determined as follows:NiSO_(4)·6H_(2)O 25 g/L,NaH_(2)PO2·H_(2)O 30 g/L,sodium acetate 20 g/L,sodium citrate 10 g/L,lactic acid 30 mg/L,thiourea 0.03 g/L,pH 6.1,temperature 80℃,and time 120 min.The surface and cross-section morphology,elemental composition,phase structure,and microhardness of the coating obtained under the optimal conditions were characterized by using scanning electron microscope,energy-dispersive spectrometer,X-ray diffractometer,and microhardness tester.The adhesion strength of the coating was evaluated through heating–cooling cycle test.The corrosion resistance of the coating was analyzed by potentiodynamic polarization measurement and electrochemical impedance spectroscopy.The EMI SE of the coating was tested.The results showed that a well-adhered nodular Ni–P alloy coating containing 15.41wt.%of phosphorus with a thickness of about 30μm,an average microhardness of 644.7 HV,good corrosion resistance,and high EMI SE was deposited on the substrate.
作者
周柏玉
李凌华
张丽芳
黄仁超
李光玉
ZHOU Baiyu;LI Linghua;ZHANG Lifang;HUANG Renchao;LI Guangyu(Modern Equipment Manufacturing Institute,ChenZhou Vocational Technical College,Chenzhou 432000,China;School of Materials Science and Engineering,Jilin University,Changchun 130022,China)
出处
《电镀与涂饰》
CAS
北大核心
2021年第12期908-914,共7页
Electroplating & Finishing
关键词
碳纤维增强聚醚醚酮
化学镀
镍磷合金镀层
耐蚀性
电磁屏蔽效能
carbon-fiber-reinforced polyether ether ketone
electroless plating
nickel–phosphorus alloy coating
corrosion resistance
electromagnetic interference shielding effectiveness
