镁合金自修复涂层研究进展

发布时间：2018-03-19 14:18

本文选题：自修复　切入点：涂层　出处：《表面技术》2016年12期 　论文类型：期刊论文

【摘要】：镁合金的耐蚀性较差,使用过程常需要防护涂层。然而,涂层在使用过程中不可避免地遭到破坏,亟需开发自修复涂层以防止涂层破坏处的局部腐蚀。结合国内外在自修复涂层尤其是镁合金自修复涂层领域的研究成果,总结了自修复涂层的类型,包括化学转化膜型、掺杂型、填充型、微容器型、层层组装型和超分子本质修复型等。其中化学转化膜型承载的修复剂有限;掺杂型工艺简单,但可能降低涂层的稳定性;填充型可以减少修复剂对涂层稳定性的影响,但是可能降低层间结合力;微容器型可以阻隔涂层基体和修复剂,但需要满足多种条件;层层组装型能承载更多修复剂且修复过程更加智能;超分子本质修复型可以实现多次修复,但是修复过程常需要外部能量输入。通过比较各类涂层的特点,为研究者设计自修复涂层提供参考,并指出自修复涂层的设计需要根据实际情况,综合各类涂层的特点,完成修复剂的成功封装与释放,在保证涂层屏蔽性的基础上,赋予涂层自修复能力。
[Abstract]:The corrosion resistance of magnesium alloys is poor, and protective coatings are often required in the process of application. However, the coatings are inevitably destroyed during the use of magnesium alloys. It is urgent to develop self-repairing coatings in order to prevent local corrosion in the damage of coatings. Combined with the research achievements in self-repairing coatings, especially magnesium alloy self-repairing coatings at home and abroad, the types of self-repairing coatings, including chemical conversion coatings, are summarized. Doping type, filling type, microvessel type, layer-by-layer assembly type and supramolecular essential repair type, among them, the chemically transformed film type has limited repairable agent, the doping type process is simple, but it may reduce the stability of the coating. The filling type can reduce the effect of the repair agent on the stability of the coating, but it may reduce the interlaminar adhesion, while the microvessel type can block the coating substrate and the repair agent, but it needs to meet a variety of conditions. Layer-by-layer assemblies can carry more repairable agents and repair processes more intelligently; supramolecular nature repair models can be repaired many times, but the repair process often requires external energy input, by comparing the characteristics of various coatings. It provides a reference for researchers to design self-repairing coatings, and points out that the design of self-repairing coatings needs to integrate the characteristics of all kinds of coatings according to the actual conditions, complete the successful packaging and release of the repair agents, and on the basis of ensuring the shielding ability of the coatings, Endow the coating with self-repairing ability.
【作者单位】：中国科学院金属研究所核用材料与安全评价重点实验室;
【基金】：辽宁“百千万人才工程”项目国家重点基础研究发展计划项目(2013CB632205)~~
【分类号】：TG174.44

【相似文献】