Surface analysis of inhibitor films formed by imidazolines and amides on mild steel in an acidic environment
Surface analysis of inhibitor films formed by imidazolines and amides on mild steel in an acidic environment
复制标题
DOI：
10.1016/j.apsusc.2005.03.178
复制
发表时间：
2006-01
影响因子：
6.7
通讯作者：
O. Olivares-Xometl;N. Likhanova;M. A. Domínguez-Aguilar;J. Hallen;L. Zamudio;E. Arce
中科院分区：
文献类型：
--
作者：
O. Olivares-Xometl;N. Likhanova;M. A. Domínguez-Aguilar;J. Hallen;L. Zamudio;E. Arce
通过优化工艺合成了咪唑类和酰胺类前驱体，收率较高。这些化合物在1.0M HCl水溶液中作为缓蚀剂通过重量和极化技术进行了评价。AISI 1018碳钢的腐蚀速率取决于测试环境中缓蚀剂的分子结构和浓度。发现缓蚀剂的吸附遵循Langmuir等温线，这一概念与Gibbs自由能为缓蚀剂按效率和稳定性排列提供了依据。AFM表面分析表明，在某些抑制剂的存在下，金属表面的损伤大大减少。XPS测定了金属表面存在一层具有保护性能的抑制剂。
Imidazolines and amidic precursors were synthesized with good yields through an optimized process. These compounds were evaluated as corrosion inhibitors in an aqueous solution of 1.0M HCl by gravimetric and polarization techniques. AISI 1018 carbon steel displayed a corrosion rate dependent on the molecular structure and concentration of inhibitor in the testing environment. Adsorption of inhibitors was found to follow the Langmuir's isotherm, this concept together with Gibbs’ free energy provided the basis to arrange corrosion inhibitors according to efficiency and stability. The surface analysis by AFM displayed that the damage on the metallic surface was considerably reduced in the presence of certain inhibitors. XPS determined the presence of a layer of inhibitor on the metal surface with protective properties.