摘要
为提高铝合金表面微弧氧化物陶瓷层在海洋环境中的抗腐蚀和耐磨损性能,在硅酸盐和磷酸盐的混合电解液中添加纳米MXene(Ti_(3)C_(2)Tx)颗粒,通过在铝合金表面微弧氧化的方法,制备掺杂MXene的氧化物陶瓷层,然后,分析研究MXene微粒对微弧氧化工艺的影响以及其对微弧氧化膜层微观形貌、组织结构、耐磨性和耐蚀性的影响。结果表明,电解液中添加的纳米MXene微粒增大了微弧氧化期间的反应电压,增加了膜层的生长速率,可有效减少膜层的微孔、裂纹等缺陷,膜层更加平整、致密;同时,纳米MXene微粒主要以熔融和嵌合等方式存在于陶瓷膜层中,复合膜层的硬度提升了19%,其在模拟海水中的摩擦系数降低了0.1,比磨损率更低,耐磨性更佳;此外,复合膜层的自腐蚀电位更高,腐蚀电流密度下降了两个数量级,显著提高了膜层的耐蚀性。
To enhance the corrosion resistance and wear resistance of aluminum alloy surface micro-arc oxidation(MAO)ceramic coatings in marine environments,it prepared MXene-doped oxide ceramic coatings by incorporating nano-MXene(Ti_(3)C_(2)Tx)particles into a mixed silicate-phosphate electrolyte through micro-arc oxidation technology.The effects of MXene particles on MAO process parameters,as well as the microstructural characteristics,mechanical properties,and corrosion behavior of the coatings were systematically investigated.The results demonstrate that the addition of nano-MXene particles significantly increases the reaction voltage during MAO process and enhances the coating growth rate.The incorporated MXene effectively reduces micro-pores and cracks in the ceramic layer,resulting in a more compact and uniform coating structure.Characterization reveals that nano-MXene particles primarily existed in the ceramic matrix through molten integration and mechanical interlocking.The composite coating exhibits a 19%improvement in microhardness compared to conventional MAO coatings.Tribological tests in simulated seawater show a 0.1 reduction in friction coefficient and significantly lower specific wear rate,indicating superior wear resistance.Electrochemical measurements reveal that the composite coating displayed higher self-corrosion potential(-0.32 V vs.SCE)and remarkably lower self-corrosion current density(3.6×10^(-8) A/cm^(2)),representing a two-order-of-magnitude improvement in corrosion resistance compared to undoped coatings.This work provides an effective strategy for developing high-performance protective coatings for marine applications through nano-reinforced micro-arc oxidation technology.
作者
许笑天
刘灿
路金林
曹晓国
XU Xiao-tian;LIU Can;LU Jin-lin;CAO Xiao-guo(School of Materials and Energy,Guangdong University of Technology,Guangzhou Guangdong 510725,China;School of Marine Equipment Engineering,Guangzhou Maritime University,Guangzhou Guangdong 510725,China)
出处
《广州航海学院学报》
2025年第1期48-54,共7页
Journal of Guangzhou Maritime University
基金
国家自然科学基金(52274296)。
关键词
微弧氧化
6061铝合金
MXene
耐蚀性
耐磨性
micro-arc oxidation
6061 aluminum alloy
MXene
corrosion resistance
wear resistance
作者简介
第一作者:许笑天(2000-),男,湖北荆门人,硕士研究生,主要从事海洋防腐蚀,铝合金微弧氧化的研究,E-mail:381971538@qq.com;通讯作者:路金林(1977-),男,辽宁沈阳人,教授,博士,主要从事电化学能源存储与转化材料、金属腐蚀与防护研究,E-mail:jinlinlu@gzmtu.edu.cn;通讯作者:曹晓国(1979-),男,山东潍坊人,副教授,博士,主要从事电磁屏蔽材料复合导电材料、固体氧化物燃料电池的研究,E-mail:xgcao@gdut.edu.cn。
