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首页> 外文期刊>International Materials Reviews >Protection and surface modification of metals with sol-gel coatings
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Protection and surface modification of metals with sol-gel coatings

机译：溶胶-凝胶涂料对金属的保护和表面改性

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摘要

The preparation and properties of protective sol-gel coatings on metallic substrates are reviewed. Control of the coating microstructure is critical to obtain the desired properties and this requires optimisation of processing parameters that include sol composition, synthesis and processing conditions, deposition method and post-deposition sintering or curing. Current knowledge in these areas, e.g. structure-property-processing relationships, and the characterisation of the coatings produced are discussed. SiO_2 layers have been found to confer good oxidation resistance, but for electrochemical corrosion resistance, mixed oxide layers or hybrid organic-inorganic layers are required. Incorporation of alkylalkoxides with polymerisable groups attached has allowed synthesis of hybrid nanostructured coatings consisting of interpenetrating, chemically bonded organic and inorganic networks. Doping of hybrid sol-gel coatings with environmentally friendly inhibitors is also a promising approach combining barrier properties with active inhibition of corrosion. The potential to control functional properties such as biocompatibility is also briefly considered. It is concluded that both fundamental work on new coating compositions and the development of improved industrial technologies are priorities for future research.
机译：综述了金属基质上保护性溶胶-凝胶涂料的制备及其性能。涂层微观结构的控制对于获得所需性能至关重要，这需要优化工艺参数，包括溶胶组成，合成和工艺条件，沉积方法以及沉积后的烧结或固化。这些领域的最新知识，例如讨论了结构-性能-加工关系以及所产生涂层的特性。已经发现SiO 2层赋予良好的抗氧化性，但是对于耐电化学腐蚀，需要混合氧化物层或有机-无机杂化层。结合具有可聚合基团的烷基烷氧基化物允许合成由互穿的，化学键合的有机和无机网络组成的杂化纳米结构涂层。用环保抑制剂对混合溶胶-凝胶涂料进行掺杂也是一种有前途的方法，该方法结合了阻隔性能和对腐蚀的主动抑制作用。还简要考虑了控制功能特性（如生物相容性）的潜力。结论是，新涂料组合物的基础工作和改进工业技术的发展都是未来研究的重点。

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