铝的耐酸活化腐蚀性能：苯并噻唑取代的镓酞菁的影响。
Corrosion Resistance of Aluminum against Acid Activation: Impact of Benzothiazole-Substituted Gallium Phthalocyanine.
机构信息
Centre for Nanotechnology Innovation, Department of Chemistry, Rhodes University, Grahamstown 6140, South Africa.
出版信息
Molecules. 2019 Jan 8;24(1):207. doi: 10.3390/molecules24010207.
This study describes the adsorption behavior of organic inhibitors at the aluminum-HCl solution interface and their corrosion inhibition performance. The organic inhibitors employed are: 4-(benzo [d]thiazol-2ylthio)phthalonitrile (BTThio) and tetrakis[(benzo[d]thiazol-2-yl-thio)phthalo- cyaninato]gallium(III) chloride (ClGaBTThioPc). The corrosion behavior of these inhibitors is investigated using electrochemical and computational techniques. Open circuit potential results reveal predominant cathodic character for the mechanism of aluminum corrosion inhibition by the inhibitors. Inhibition efficiency values from potentiodynamic polarization measurements increase from 46.9 to 70.8% for BTThio and 59.7 to 81.0% for ClGaBTThioPc within the concentration range of 2 to 10 μM. Scanning electron microscopy (SEM) measurements reveal protection of the metal surface from acid attack, in the presence of the inhibitors and energy dispersive X-ray (EDX) measurements show that the most probable way by which the inhibitors protect the metal surface would be by shielding it from the corrosion attacks of Cl from the acid. Quantum chemical parameters corroborate well with experimental findings.
本研究描述了有机抑制剂在铝-HCl 溶液界面上的吸附行为及其缓蚀性能。所采用的有机抑制剂为：4-（苯并[d]噻唑-2-基硫代）邻苯二甲腈（BTThio）和四[（苯并[d]噻唑-2-基硫代）酞菁基]化镓（III）氯化物（ClGaBTThioPc）。使用电化学和计算技术研究了这些抑制剂的腐蚀行为。开路电位结果表明，抑制剂对铝腐蚀的抑制机制主要为阴极控制。在 2 到 10 μM 的浓度范围内，BTThio 的缓蚀效率值从 46.9%增加到 70.8%，ClGaBTThioPc 的缓蚀效率值从 59.7%增加到 81.0%。扫描电子显微镜（SEM）测量结果表明，抑制剂可保护金属表面免受酸的侵蚀，能谱（EDX）测量结果表明，抑制剂保护金属表面的最可能方式是将其屏蔽在酸中的 Cl 的腐蚀攻击之外。量子化学参数与实验结果很好地吻合。
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