丹参提取物作为绿色缓蚀剂在盐酸环境中对 Q235 钢的缓蚀性能探索

Cheng Zeng, Zong-Yi Zhou, Wen-Jie Mai, Qiu-Hao Chen, Jin-Bei He, Bo-Kai Liao
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引用次数: 0

摘要

丹参作为一种分布广泛且常用的传统中药材,受到了广泛关注。本研究采用一步水提取法制备了丹参提取物(SME),并首次在 1 mol/L HCl 溶液中用作 Q235 钢的新型缓蚀剂。经液相色谱-质谱鉴定,结果表明丹参酸 A、丹参酮 II A、丹参新酮 D、二氢丹参酮和亚甲基丹参醌是 SME 的主要成分。根据扫描振动电极技术(SVET)的监测,抑制剂分子在金属表面的吸附大大延缓了局部腐蚀的扩展。对腐蚀表面的原子力显微镜检查显示,与空白组相比,添加了 SME 的样品表面更加光滑。添加 SME 组的力曲线图显示,点阵分布更均匀,平均附着力更高,表明添加 SME 提高了金属表面的耐腐蚀性。XPS 表征表明,SME 与铁离子相互作用,形成不溶性沉淀。这项研究将 SME 用作酸性介质中碳钢的环保型缓蚀剂,为丹参的高附加值利用提供了一种新方法。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Exploration on the corrosion inhibition performance of Salvia miltiorrhiza extract as a green corrosion inhibitor for Q235 steel in HCl environment
Salvia Miltiorrhiza, extensively distributed and commonly employed as a traditional Chinese medicinal herb, has garnered significant attention. In this study, the Salvia Miltiorrhiza extract (SME) was prepared by one-step water extraction method, and was firstly used as a novel corrosion inhibitor for Q235 steel in 1 mol/L HCl solution. As identified via liquid chromatography-mass spectrometry, the findings reveal that Salvianic acid A, tanshinone II A, danshenxinkun D, dihydrotanshinone, and methylene tanshinquinone are the primary constituents of SME. The optimum corrosion inhibition efficiency reached 92.8 % at 200 mg/L and maintained at 90.4 % after 72 h. Based on scanning vibration electrode technology (SVET) monitoring, the adsorption of inhibitor molecules on metal surface greatly retarded the propagation of localized corrosion. AFM examination of the corroded surface reveals that the samples supplemented with SME exhibit a smoother surface compared to the blank group. The force curve graph for the SME-added group demonstrates a more evenly distributed point array and an elevated average adhesion force, indicating that the addition of SME improves the corrosion resistance of the metal surface. XPS characterization illustrated that SME interacted with iron ions to form insoluble precipitate. This work investigated the application of SME as an eco-friendly corrosion inhibitor for carbon steel in acidic medium, providing a new approach for the high value-added utilization of Salvia Milliorrhiza.
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