Graphical abstract
摘要
以2205双相不锈钢为基体材料, 采用原位氧化的方法制备了厚度为734 nm的Cr2O3涂层, 研究了溶液PH值对2205双相不锈钢基体和涂层样品微观形貌和耐蚀性的影响, 其中设定腐蚀环境为3 wt.% NaCl, 0.1 mol KOH和0.5 mol H2SO4溶液。采用扫描电子显微镜, 掠入射X射线衍射仪和辉光放电光谱分别对待测样品的微观结构, 相组成和深度方向元素分布进行表征。结果表明涂层沉积致密且沿深度方向均匀分布, 涂层由Cr2O3和MnCr2O4尖晶石相组成。采用电化学方法对涂层样品和基体的耐蚀性进行评价, 结果表明2205双相不锈钢基体在碱性溶液中具有较好的耐蚀性, 而对于涂层样品在酸性溶液抗腐蚀性能较好。由于涂层的存在, 在不同PH值溶液中基体和涂层样品的腐蚀机理不同, 从而导致相同PH溶液下样品的抗腐蚀性能存在较大差异。
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This work was financially supported by the Innovation Capability Support Program of Shaanxi (No. 2019TD-038 and 2020KJXX-063).
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Cai, R., Wang, WJ., Zhao, N. et al. Corrosion resistance of Cr2O3 coating formed by in-situ oxidation on 2205 duplex stainless steel in different pH solutions. Rare Met. 42, 2189–2196 (2023). https://doi.org/10.1007/s12598-022-02248-y
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DOI: https://doi.org/10.1007/s12598-022-02248-y