Abstract The inhibiting effect of 12-aminododecanoic acid (AA) on corrosion of carbon steel (CS) in CO2-saturated hydrochloric acid was investigated. It was found that AA acts as a mixed-type inhibitor, yielding a maximum inhibition efficiency of 98.1 ± 0.1%. The mechanism of its corrosion inhibition is by formation of a self-assembled monolayer (SAM), which presents a tight hydrophobic barrier imposed by the (–CH2)11 chain. In-situ PM-IRRAS measurements revealed that the SAM is amorphous. The SAM formation process was found to be spontaneous and reversible. The corresponding standard Gibbs energy of AA adsorption on CS was calculated to be −28 kJ mol−1.

中文翻译：

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12-氨基十二烷酸与碳钢表面的相互作用：开发“绿色”缓蚀剂

摘要 研究了12-氨基十二烷酸(AA)在CO2饱和盐酸中对碳钢(CS)腐蚀的抑制作用。发现 AA 作为混合型抑制剂，产生的最大抑制效率为 98.1 ± 0.1%。其腐蚀抑制机制是通过形成自组装单层 (SAM)，它呈现出由 (-CH2)11 链施加的紧密疏水屏障。原位 PM-IRRAS 测量显示 SAM 是无定形的。发现 SAM 形成过程是自发的和可逆的。AA吸附在CS上的相应标准吉布斯能量计算为-28 kJ mol-1。