ABSTRACT

The inhibition impacts of two novel synthesized green biosurfactants (B-Surf.), namely, sodium N-dodecyl asparagine (AsS) and sodium N-dodecyl arginine (ArS), on the dissolution of mild steel alloy (MS-37-2), in aqueous sodium chloride solutions was inspected using various techniques. Increased concentration of NaCl solution resulted in an increase in the corrosion rate of MS-37-2. Inhibition efficiencies of B-Surf. compounds were found to increased with increase inhibitor concentrations. The synergistic inhibition action between B-Surf. inhibitors and Zn²⁺, Al³⁺ and Ce⁴⁺ on the dissolution behavior of steel alloy in NaCl solutions was investigated and interpreted. The surface morphology of the MS-37-2 surface was observed using a scanning electron microscopy (SEM). This adsorption follows Langmuir isotherm. The evaluated thermodynamic functions supported the mechanism of physical adsorption of the inhibitors. The mechanisms of corrosion and its inhibition of MS-37-2 in NaCl solutions were interpreted.

摘要

两种新型合成绿色生物表面活性剂 (B-Surf.)，即 N-十二烷基天冬酰胺钠 (AsS) 和 N-十二烷基精氨酸钠 (ArS) 对低碳钢合金 (MS-37-2) 溶解的抑制作用, 在氯化钠水溶液中使用各种技术进行检查。NaCl 溶液浓度的增加导致 MS-37-2 的腐蚀速率增加。B-Surf 的抑制效率。发现化合物随着抑制剂浓度的增加而增加。B-Surf 之间的协同抑制作用。抑制剂和 Zn ²⁺、Al ³⁺和 Ce ⁴⁺对钢合金在 NaCl 溶液中的溶解行为进行了研究和解释。使用扫描电子显微镜（SEM）观察 MS-37-2 表面的表面形态。这种吸附遵循朗缪尔等温线。评估的热力学函数支持抑制剂的物理吸附机制。解释了MS-37-2在NaCl溶液中的腐蚀机理及其抑制作用。