Rubén del Olmo, Alexandre Bastos, Kiryl Yasakau, Alesia Sushkova, Raúl Arrabal, João Tedim
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引用次数: 0
摘要
本研究探讨了单宁酸(TA)抑制 AA2024 合金腐蚀的基本原理,单宁酸是一种不含铬的环保型天然产品。为此,将 AA2024 合金浸入含有不同浓度(0.1-10 mM)TA 的 NaCl 溶液(50 mM)中 7 天。在 TA 溶液中浸泡 1 天后,表面(SEM、拉曼和 SKPFM)和电化学分析(EIS、PDP 和 SVET)显示出混合抑制作用。在 TA 溶液中长期浸泡测试会在表面生成富含鞣酸的氧化膜。鞣酸含量低的薄膜(在 0.1 和 1 mM TA 溶液中形成)显示出最高的稳定性和耐腐蚀性。
Corrosion inhibitor from nature: Fundamentals of tannic acid inhibition for AA2024 alloy
This study addresses the fundamentals of corrosion inhibition of AA2024 alloy by tannic acid (TA), a Cr-free and eco-friendly natural product. To this end, the AA2024 alloy was immersed in NaCl solution (50 mM) with different TA concentrations (0.1–10 mM) for 7 days. Surface (SEM, Raman, and SKPFM) and electrochemical analyses (EIS, PDP, and SVET) revealed mixed inhibition after 1 day of immersion in TA solution. Long-term immersion tests in TA solutions produced a tannate-rich oxide film on the surface. The films with low tannate content (formed in 0.1 and 1 mM TA) showed the highest stability and corrosion resistance.
期刊介绍:
Applied Surface Science covers topics contributing to a better understanding of surfaces, interfaces, nanostructures and their applications. The journal is concerned with scientific research on the atomic and molecular level of material properties determined with specific surface analytical techniques and/or computational methods, as well as the processing of such structures.