探索天然聚合物在盐环境中作为 AZ31 镁合金的绿色缓蚀剂的应用。
Exploration of natural polymers for use as green corrosion inhibitors for AZ31 magnesium alloy in saline environment.
机构信息
Center of Research Excellence in Corrosion, King Fahd University of Petroleum & Minerals, Dhahran, 31261, Saudi Arabia.
Center of Research Excellence in Corrosion, King Fahd University of Petroleum & Minerals, Dhahran, 31261, Saudi Arabia.
出版信息
Carbohydr Polym. 2020 Feb 15;230:115466. doi: 10.1016/j.carbpol.2019.115466. Epub 2019 Dec 6.
Seven natural polymers namely, chitosan (CHI), dextran (Dex), carboxymethyl cellulose (CMC), sodium alginate (ALG), pectin (PEC), hydroxylethyl cellulose (HEC), and Gum Arabic (GA) were screened for anticorrosion property towards AZ31 Mg alloy in 3.5 wt.% NaCl solution. CHI, Dex, CMC, PEC, and GA accelerated the corrosion while ALG and HEC moderately inhibited the corrosion of the alloy. HEC and ALG (1 g/L) protected the alloy by 64.13 % and 58.27 %, respectively. Two inhibitor cocktails consisting of either HEC or ALG, KI, and Date palm seed oil have been formulated. HEC- and ALG-formulations inhibited the alloy corrosion by 80.56 % and 77.43 %, respectively from EIS technique. Surface observation studies using SECM, AFM, SEM, and EDX agreed with other experimental results revealing effective corrosion inhibition by the formulations. X-ray photoelectron spectroscopy, FTIR, and UV-vis results disclose that Mg(OH) co-existed with adsorbed inhibitor complexes.
七种天然聚合物，壳聚糖（CHI）、葡聚糖（Dex）、羧甲基纤维素（CMC）、海藻酸钠（ALG）、果胶（PEC）、羟乙基纤维素（HEC）和阿拉伯胶（GA），在 3.5wt.%NaCl 溶液中对 AZ31Mg 合金的耐腐蚀性能进行了筛选。CHI、Dex、CMC、PEC 和 GA 加速了合金的腐蚀，而 ALG 和 HEC 则适度抑制了合金的腐蚀。HEC 和 ALG（1g/L）分别保护合金的效率达到 64.13%和 58.27%。两种抑制剂鸡尾酒由 HEC 或 ALG、KI 和椰枣籽油组成。HEC 和 ALG 配方分别通过 EIS 技术抑制合金腐蚀 80.56%和 77.43%。使用 SECM、AFM、SEM 和 EDX 进行的表面观察研究与其他实验结果一致，表明这些配方具有有效的腐蚀抑制作用。X 射线光电子能谱、FTIR 和 UV-vis 结果表明，Mg(OH)与吸附抑制剂配合物共存。
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