广西科学院高性能材料研究所;广西国潮铝业有限公司;广西桂科院铝业有限公司;广西科学院应用物理研究所有限公司;
[目的]船身外壳与船板常用材质为5083铝合金板材，但在海洋环境中仍然会发生一定程度的腐蚀，拟开发一种超疏水涂层进行防护。[方法]利用钛白粉厂废弃的FeOOH粉末为原料，十六烷基三甲氧基硅烷(HDTMS)作为改性剂，以湿法球磨工艺制备了α-Fe_2O_3超疏水微纳米粉末，再配合环氧树脂，通过喷涂在5083铝合金表面构建稳定且耐腐蚀的超疏水涂层，并对涂层的疏水性、微观形貌、力学性能和耐蚀性进行了测试。[结果]当HDTMS的添加量为3%时，α-Fe_2O_3超疏水微纳米粉末及其相应的复合涂层的疏水性能最佳，水接触角分别达到164°和161°，水滴滑动角分别达到2.3°和2.4°，复合涂层的铅笔硬度为4H。该复合涂层在3.5%Na Cl水溶液中浸泡30 d后，其水接触角仍然达到156°，在高浓度盐水、强酸和强碱中也具有优异的稳定性。电化学测试表明，与空白5083铝板相比，覆盖基于α-Fe_2O_3的超疏水涂层的5083铝板的耐蚀性得到极大提高，腐蚀电流密度减小了大约1个数量级，低频阻抗模值提高了2个数量级，并且在30d长期腐蚀条件下仍具有良好的防护性能。[结论]采用湿法球磨加喷涂技术在5083铝合金表面制备的α-Fe_2O_3超疏水环氧涂层可显著提高铝合金的综合性能。
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基本信息:
DOI：10.19289/j.1004-227x.2025.04.003
中图分类号:TG174.4
引用信息:
[1]郝成罡,王仲民,李吉刚等.5083铝合金表面α-Fe_2O_3基超疏水防腐复合涂层的制备及性能研究[J].电镀与涂饰,2025,44(04):16-23.DOI:10.19289/j.1004-227x.2025.04.003.
基金信息:
2024年广西科技重大专项（桂科AA24263065）; 2024年中央引导地方科技发展资金项目（桂科ZY24212007）; 2024年南宁市科技重大专项（20241023）; 2024年广西重点研发计划（桂科AB24010123）; 广西科学院改革发展专项（2024YGFZ504-1010）