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首页> 外文期刊>Journal of the European Ceramic Society >Comparative study of the corrosion resistance of thermally sprayed ceramic coatings and their bulk ceramic counterparts
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Comparative study of the corrosion resistance of thermally sprayed ceramic coatings and their bulk ceramic counterparts

机译：热喷涂陶瓷涂层与整体陶瓷涂层耐腐蚀性的比较研究

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摘要

A comparative study of the corrosion properties of thermally sprayed ceramic coatings (Al_2O_3, Al_2O_3-TiO_2 with different ratios, mullite, and ZrSiO_4) and their sintered bulk ceramic counterparts was performed. The coatings were deposited on corrosion-resistant steel substrates using atmospheric plasma spraying (APS) and high velocity oxy-fuel (HVOF) spraying processes. The corrosion properties were investigated in 1 N solutions of NaOH and H_2SO_4 at 85 °C, respectively. The coating microstructures and phase compositions, as well as the corrosive environment were shown to have a strong effect on the corrosion resistance of the coatings. Al_2O_3-coatings were more sensitive to these factors than Al_2O_3-TiO_2 coatings were. The corrosion resistance of the bulk ceramics was superior to that of the thermally sprayed coatings. This is mainly because the coatings exhibited specific microstructure and contained amorphous and/or metastable phases not appearing in the bulk ceramics.
机译：对热喷涂陶瓷涂层（不同比例的莫来石，莫来石和ZrSiO_4的Al_2O_3，Al_2O_3-TiO_2）及其烧结体陶瓷涂层的腐蚀性能进行了比较研究。使用大气等离子喷涂（APS）和高速氧-燃料（HVOF）喷涂工艺将涂层沉积在耐腐蚀钢基材上。分别在85°C的NaOH和H_2SO_4的1 N溶液中研究了腐蚀性能。涂层的微观结构和相组成以及腐蚀环境对涂层的耐腐蚀性具有很强的影响。 Al_2O_3-涂层比Al_2O_3-TiO_2涂层对这些因素更敏感。大块陶瓷的耐腐蚀性优于热喷涂涂层。这主要是因为涂层表现出特定的微观结构，并且包含在块状陶瓷中不存在的非晶态和/或亚稳态相。

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