摘要
为提高铜合金轴瓦在甲醇燃料泄漏环境下的摩擦学性能和防腐性能,在CuPb24Sn表面采用液体喷涂法设计制备了Ti_(3)AlC_(2)和B_(4)C填充的环氧树脂(EP)涂层。通过电化学阻抗谱测试表征了复合涂层在体积比1∶9的甲酸与甲醇混合溶液中的耐腐蚀性能,并通过高频往复摩擦磨损试验研究了该涂层在甲酸+甲醇+润滑油复杂工况下的温升摩擦学性能和磨损机理。结果表明,所制备的Ti_(3)AlC_(2)和B_(4)C填充EP涂层具有优异的耐腐蚀性能。在甲酸+甲醇+润滑油的复杂工况下,涂层的摩擦系数随着温度的升高而减小,而涂层的磨损率随着温度的升高而增大。涂层在75℃下的磨痕较25℃更宽,磨痕表面出现了明显的犁沟效应。通过MS模拟计算,发现环氧树脂的抗剪切强度随温度升高而降低是导致涂层磨损率变化的主要原因。
In order to enhance the tribological and anti-corrosion performance of copper alloy bearing bushes in methanol fuel leakage environ-ments,an epoxy resin(EP)coating filled with Ti_(3)AlC_(2) and B_(4)C was designed and prepared on the surface of CuPb24Sn by liquid spraying method.The corrosion resistance of the composite coating was characterized by electrochemical impedance spectroscopy in a formic acid and methanol mixed solution with a volume ratio of 1:9,while its temperature rise tribological performance and wear mechanisms under complex 49 working conditions(formic acid+methanol+lubricating oil)were investigated through high-frequency reciprocating friction-wear tests.Re-sults showed that the Ti_(3)AlC_(2)-and B_(4)C-filled EP coating exhibited excellent corrosion resistance.Under the formic acid+methanol+lubrica-ting oil condition,the coating’s friction coefficient decreased with rising temperature,whereas its wear rate increased.At 75℃,the wear scar became wider than at 25℃,with evident ploughing effects observed on the worn surface.Materials Studio software was used for simulation cal-culation,and it was found that the decrease in shear strength of epoxy resin with increasing temperature was the main reason for the change in wear rate of coating.
作者
肖家林
陈云锋
李浩
所新坤
曹均
XIAO Jialin;CHEN Yunfeng;LI Hao;SUO Xinkun;CAO Jun(School of Mechanical Engineering and Mechanics,Ningbo University,Ningbo 315211,China;School of Mechanical and Electrical Engineering,Wenzhou University,Wenzhou 325035,China;China Railway Lanzhou Group Co.,Ltd.,Lanzhou 730099,China;Shandong ZKRB Coating Co.,Ltd.,Jinan 250101,China;Suzhou SHRB Coating Co.,Ltd.,Suzhou 215104,China)
出处
《材料保护》
2025年第4期48-55,共8页
Materials Protection
基金
国家自然科学基金(52005273)
浙江省“尖兵”“领雁”重大项目(2024C01217)
中国博士后基金(2023M742894)
宁波市重点研发项目(2023T010,2023Z198,2024T002)
中国铁路兰州局集团有限公司科技研究项目(LZJKY2024002-2)
山东省建筑与交通双碳创新创业共同体科技研发项目(STGTT0201202405)
福建省科技计划区域发展项目(2060404)。
关键词
环氧树脂涂层
腐蚀
摩擦学
温升工况
epoxy resin coating
corrosion
tribology
temperature rise working condition
