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Investigation of a hydrophobically associating AMAHS polyacrylamides: A new corrosion inhibitor for mild steel in HCl
Materials and Corrosion ( IF 1.6 ) Pub Date : 2020-03-23 , DOI: 10.1002/maco.201911464 Xingxing Rao 1 , Long Zhou 1 , Guanglong Zhang 1 , Xuan Wang 1 , Shuwei Xia 1 , Liangmin Yu 2
Materials and Corrosion ( IF 1.6 ) Pub Date : 2020-03-23 , DOI: 10.1002/maco.201911464 Xingxing Rao 1 , Long Zhou 1 , Guanglong Zhang 1 , Xuan Wang 1 , Shuwei Xia 1 , Liangmin Yu 2
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A polyacrylamide with capsaicin‐derived monomers (AM–MAA–AMPS–HMBA–SMA; AMAHS) was synthesized and investigated as a novel environment‐friendly polymer inhibitor for Q235 mild steel at 25°C in 1 M HCl solution. The inhibition efficiency was evaluated by weight loss measurements, electrochemical experiments, and surface investigation methods as well as by theoretical calculations. Experimental results indicated that the efficiency of AMAHS was up to 94.86% at the concentration of 2 g/L. Electrochemical tests and surface morphology analysis showed that AMAHS served as a mixed‐type corrosion inhibitor, which could be adsorbed and self‐assembled on the surface of mild steel forming a highly hydrophobic protective film (contact angle of 172°). Density functional theory calculations revealed that heteroatoms in AMAHS, such as O, N, S, are active sites in forming coordination bonds with surface iron atoms. In addition, hydrophobic groups played an important role in protecting the metal surfaces from corrosion media.
中文翻译：
疏水缔合的AMAHS聚丙烯酰胺的研究：一种用于HCl中低碳钢的新型缓蚀剂
合成了具有辣椒素衍生单体的聚丙烯酰胺（AM-MAA-AMPS-HMBA-SMA; AMAHS），作为一种新型的环保型Q235低碳钢聚合物抑制剂，在25°C的1 M HCl溶液中进行了研究。通过重量损失测量，电化学实验，表面研究方法以及理论计算来评估抑制效率。实验结果表明，在2 g / L的浓度下，AMAHS的效率高达94.86％。电化学测试和表面形态分析表明，AMAHS是一种混合型缓蚀剂，可被吸附并自组装在低碳钢表面上，形成高度疏水的保护膜（接触角为172°）。密度泛函理论计算表明，AMAHS中的杂原子如O，N，S，是与表面铁原子形成配位键的活性位点。另外，疏水基团在保护金属表面不受腐蚀介质的影响中起着重要作用。
更新日期：2020-03-23
中文翻译：
疏水缔合的AMAHS聚丙烯酰胺的研究：一种用于HCl中低碳钢的新型缓蚀剂
合成了具有辣椒素衍生单体的聚丙烯酰胺（AM-MAA-AMPS-HMBA-SMA; AMAHS），作为一种新型的环保型Q235低碳钢聚合物抑制剂，在25°C的1 M HCl溶液中进行了研究。通过重量损失测量，电化学实验，表面研究方法以及理论计算来评估抑制效率。实验结果表明，在2 g / L的浓度下，AMAHS的效率高达94.86％。电化学测试和表面形态分析表明，AMAHS是一种混合型缓蚀剂，可被吸附并自组装在低碳钢表面上，形成高度疏水的保护膜（接触角为172°）。密度泛函理论计算表明，AMAHS中的杂原子如O，N，S，是与表面铁原子形成配位键的活性位点。另外，疏水基团在保护金属表面不受腐蚀介质的影响中起着重要作用。
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