食用香料1,4-二硫-2,5-二醇环保型缓蚀剂对X70钢在0.5 mol/L H2SO4溶液中的缓蚀性能研究  

Food Spices 2,5-Dihydroxy-1,4-dithiane as an Eco-friendly Corrosion Inhibitor for X70 Steel in 0.5 mol/L H2SO Solution

作　　者：谭伯川 张胜涛[1] 李文坡[1] 向斌[1] 强玉杰 TAN Bochuan;ZHANG Shengtao;LI Wenpo;XIANG Bin;QIANG Yujie(School of Chemistry and Chemical Engineering,Chongqing University,Chongqing 400044,China;Key Laboratory of Marine Materials and Related Technologies,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,China)

机构地区：[1]重庆大学化学化工学院,重庆400044 [2]中国科学院宁波材料技术与工程研究所,中国科学院海洋新材料与应用技术重点实验室,宁波315201

出　　处：《中国腐蚀与防护学报》2021年第4期469-476,共8页Journal of Chinese Society For Corrosion and Protection

基　　金：国家自然科学基金(21878029和21676035);重庆市研究生科研创新项目(CYB19032);广东扬帆计划(2015YT02D025)。

摘　　要：使用实验和理论计算方法研究了食用香料1,4-二硫-2,5-二醇(DDD)对X70管线钢在0.5 mol/L硫酸溶液中的缓蚀性能。结果表明,DDD能够有效的抑制X70钢在H_(2)SO_(4)介质中的腐蚀,在温度为298 K时,DDD的缓蚀效率可以达到93.6%;随着温度的升高,DDD依然能够展现出良好的缓蚀性能。腐蚀微观形貌观察也证明了DDD能够明显抑制X70钢的腐蚀。吸附等温模型研究结果表明,DDD在X70钢表面的吸附符合Langmuir单层吸附。采用量子化学计算和分子动力学模拟从理论层面讨论了DDD在钢表面的吸附及缓蚀机理。The corrosion inhibition performance of 2,5-Dihydroxy-1,4-dithiane(DDD)for X70 pipeline steel in 0.5 mol/L sulfuric acid solution was studied via experimental and theoretical means.Electrochemical experimental data show that DDD can effectively inhibit the corrosion of X70 steel in sulfuric acid solution.The corrosion inhibition efficiency of DDD can reach 93.6%at 298 K.In addition,DDD can still exhibit good corrosion inhibition performance at higher temperatures.The adsorption of DDD on the surface of X70 steel is consistent with Langmuir single layer adsorption.Results of quantum chemical calculation and molecular dynamics simulation also proved the above adsorption and inhibition mechanism of DDD on steel deduced from experimental results.

关 键 词：缓蚀剂 食用香料 硫酸 LANGMUIR吸附 量子化学计算 

分 类 号：TG174[金属学及工艺—金属表面处理]