The University of Technology in Baghdad addresses problems related to the corrosion of metals. In the present investigation, a thiophene derivative, namely, 2-acetylthiophene thiosemicarbazone (2-AT), was synthesized and examined as a corrosion inhibitor for mild steel in a 1-M hydrochloric acid environment by using weight loss and scanning electron microscopic techniques. The inhibition efficiency of this inhibitor increases with increase in concentration, which offered an inhibition efficiency up to 96%. It was found that the inhibition efficiency decreases with long immersion time. The temperature effect on the inhibition performance was studied at various immersion times and revealed that the inhibition efficiency decreases with increasing temperature. The adsorption of the inhibitor on the surface of mild steel in the corrosive environment followed the Langmuir isotherm. The results of scanning electron microscopy (SEM) reveal that the 2-AT molecules confirmed the presence of a protective layer on the surface of a mild steel sample. The density-functional theory as a quantum modeling technique which is used to study the electronic structure reveals that the obtained findings were found to be consistent with the experimental results.

中文翻译：

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补充DFT研究乙酰噻吩硫半碳zone缓蚀HCl中缓蚀性能的实验研究。

巴格达工业大学致力于解决与金属腐蚀有关的问题。在本研究中，通过重量损失和扫描电子显微镜技术，合成了噻吩衍生物，即2-乙酰基噻吩硫代半碳酮（2-AT），并作为1-M盐酸环境中低碳钢的腐蚀抑制剂进行了研究。该抑制剂的抑制效率随着浓度的增加而增加，其抑制效率高达96％。发现抑制效率随着浸泡时间的延长而降低。研究了温度在不同浸入时间下对缓蚀性能的影响，结果表明随着温度的升高，缓蚀效率降低。兰格缪尔等温线是在腐蚀环境中缓蚀剂在低碳钢表面的吸附。扫描电子显微镜（SEM）的结果表明，2-AT分子证实了低碳钢样品表面上存在保护层。用于研究电子结构的密度泛函理论作为一种量子建模技术表明，所发现的发现与实验结果是一致的。