Abstract Formation of corrosion products on zinc was investigated with in-situ Raman and FTIR when exposed to wet supercritical carbon dioxide (scCO2) and subsequent depressurization. Zinc oxide (ZnO) and smithsonite (ZnCO3) formed on zinc in scCO2. The dissolved water precipitated as liquid water in the reaction cell during depressurization. Formation of ZnO, ZnCO3 and a needle-like zinc hydroxy carbonate species on zinc was observed inside a sessile water droplet during conditions simulating the depressurization phase. Addition of oxygen accelerated the formation of the carbonate species due to higher cathodic activity that increased zinc dissolution.

中文翻译：

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湿超临界和亚临界 CO2 中锌腐蚀产物的形成：原位光谱研究

摘要 当暴露于湿超临界二氧化碳 (scCO2) 并随后减压时，使用原位拉曼和 FTIR 研究了锌上腐蚀产物的形成。氧化锌 (ZnO) 和菱锌矿 (ZnCO3) 在 scCO2 中的锌上形成。在减压过程中，溶解的水在反应池中以液态水的形式沉淀。在模拟减压阶段的条件下，在固着水滴内观察到在锌上形成 ZnO、ZnCO3 和针状羟基碳酸锌物质。由于更高的阴极活性增加了锌的溶解，氧气的加入加速了碳酸盐物质的形成。