Abstract The efficiency of thin hydrogen silsesquioxane (HSQ) −based corrosion barrier coatings on 316L substrates after oxidative thermal curing at 400–550 °C in air was investigated. Infrared spectroscopy and electrochemical impedance spectroscopy showed that an increasing curing temperature leads to progressing coating densification, accompanied by decreasing barrier properties. Cyclic polarization measurements indicated that defects due to substrate oxidation are detrimental for the substrate passivity. Insufficiently polymerized coatings showed poor chemical stability in neutral salt spray testing and the chemical coating stability increased with curing temperature. Oxidative curing was found inadequate as polymerization treatment of HSQ-based corrosion barrier coatings on 316L substrate.

中文翻译：

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涂有空气固化氢倍半硅氧烷基旋涂玻璃搪瓷的 AISI 316L 在氯化物环境中的耐腐蚀性

摘要 研究了在空气中 400–550 °C 氧化热固化后，316L 基材上薄的氢倍半硅氧烷 (HSQ) 基腐蚀阻隔涂层的效率。红外光谱和电化学阻抗谱表明，固化温度升高会导致涂层致密化，同时阻隔性能降低。循环极化测量表明由于衬底氧化引起的缺陷对衬底钝化是有害的。聚合不足的涂层在中性盐雾试验中表现出较差的化学稳定性，并且化学涂层稳定性随固化温度升高而增加。在 316L 基材上对基于 HSQ 的防腐蚀涂层进行聚合处理时，发现氧化固化不充分。