高等学校化学学报2018，Vol.39Issue(5)：1018-1025,8.DOI:10.7503/cjcu20170557
3-丁基-5,5-二甲基海因咪唑季铵盐对HCl溶液中Q235钢的缓蚀性能
Corrosion Inhibition of 3-Butyl-5,5-dimethyhydantoin Imidazole Ammonium Salt on Q235 Steel in HCl Solution
摘要
Abstract
The corrosion inhibition performance and adsorption behavior of 3-butyl-5,5-dimethyhydantoin imidazole ammonium(BDMHI)for Q235 steel in HCl solution was investigated by mass loss method,polariza-tion curve,electrochemical impedance spectroscopy(EIS),scanning electron microscopy(SEM),and contact angle measurements. The results show that inhibition efficiency increases with the increase of mass concentra-tion of BDMHI and decreases with the increase of temperature; the highest inhibition efficiency is 91.62%;inhibition efficiency is above 80%at a BDMHI mass concentration of 1.0 g/L in the temperature range of 25—35 ℃. The adsorption properties of BDMHI were estimated using the standard adsorption Gibbs free energy change(ΔG0ads)and enthalpy change(ΔH0ads), respectively. The results reveal that the adsorption processes are exothermal and belong to a mix-type adsorption with physical adsorption and chemical adsorption,following Langmuir adsorption isotherm. The relationship between the molecular structure of BDMHI and the inhibition efficiency was investigated using quantum chemical calculations.关键词
咪唑季铵盐/缓蚀性能/吸附/量子化学Key words
Imidazole ammonium salt/Corrosion inhibition/Adsorption/Quantum chemistry分类
化学化工引用本文复制引用
郭睿,李云鹏,土瑞香,宋博,郭煜..3-丁基-5,5-二甲基海因咪唑季铵盐对HCl溶液中Q235钢的缓蚀性能[J].高等学校化学学报,2018,39(5):1018-1025,8.基金项目
陕西省教育厅服务地方专项计划项目(批准号:15JF011)和陕西省工业科技攻关项目(批准号:2016GY-146)资助. Supported by the Shaanxi Provincial Department of Education to Serve the Local Special Projects, China(No.15JF011)and the Industrial Science and Technology Program of Shaanxi Province,China(No.2016GY-146). （批准号:15JF011）
