Experimental and Theoretical Studies for Corrosion Inhibition of Copper by 2,5-bis (ethyldisulfanyl)-1,3,4-thiadiazole in Rolling Oil

Sang Xiong; Jianlin Sun; Xudong Yan

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Experimental and Theoretical Studies for Corrosion Inhibition of Copper by 2,5-bis (ethyldisulfanyl)-1,3,4-thiadiazole in Rolling Oil

机译：2,5-双（乙基二硫烷基）-1,3,4-噻二唑在轧制油中缓蚀铜的实验和理论研究

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The effect of 2,5-bis (ethyldisulfanyl)-1,3,4-thiadiazole (DTA) on the corrosion of copper in rolling oilcontaining aggressive additives was investigated by polarization, electrochemical impedancespectroscopy and weight loss measurement. The inhibition efficiency increases with the increase inconcentration of inhibitors and temperature, below 373K. DTA acted as a kind of mixed-type inhibitor,the adsorption of inhibitors on copper surface obeys Langmuir isotherm and chemisorptionmechanism. Kinetic model indicating the adsorbed DTA molecules on copper surface block the mostactive sites. Thermodynamics and quantum chemical calculations demonstrate that the adsorptionconfiguration is found to be stable after corrosion inhibitor by itself decomposes, the sulfur-sulfurbonds are break and electrons are transferred from sulfur to carbon.

机译：通过极化，电化学阻抗谱和失重测量研究了2,5-双（乙基二硫烷基）-1,3,4-噻二唑（DTA）对含腐蚀性添加剂的轧制油中铜腐蚀的影响。在373K以下，随着抑制剂浓度和温度的增加，抑制效率也随之增加。 DTA是一种混合型缓蚀剂，缓蚀剂在铜表面的吸附遵循朗缪尔等温线和化学吸附机理。动力学模型表明吸附在铜表面的DTA分子会阻断最活跃的位点。热力学和量子化学计算表明，在缓蚀剂自身分解，硫-硫键断裂以及电子从硫转移到碳之后，发现吸附构型稳定。

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《International Journal of Electrochemical Science》 |2016年第12期|共15页
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Sang Xiong; Jianlin Sun; Xudong Yan;
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Experimental and Theoretical Studies for Corrosion Inhibition of Copper by 2,5-bis (ethyldisulfanyl)-1,3,4-thiadiazole in Rolling Oil

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