CAJ | 학술논문

本文采用失重法考察了不同温度下3%柠檬酸中,不同浓度的硫脲对碳钢的缓蚀作用;并对柠檬酸介质中硫脲在碳钢表面吸附热力学进行了研究.硫脲低浓度时,随浓度增大,缓蚀作用增强;当其浓度达到一定值后,缓蚀作用基本保持不变.实验结果表明,硫脲在碳钢表面产生单分子层吸附,并且满足Langmuir 吸附规律.ΔG 0<0,吸附过程自发进行;并且随着温度的升高ΔG 0增大,吸附作用降低.ΔH 0<0,表明反应是放热过程.ΔS0<0,随着吸附过程的进行,体系进入更为有序状态.
본문채용실중법고찰료불동온도하3%저몽산중,불동농도적류뇨대탄강적완식작용;병대저몽산개질중류뇨재탄강표면흡부열역학진행료연구.류뇨저농도시,수농도증대,완식작용증강;당기농도체도일정치후,완식작용기본보지불변.실험결과표명,류뇨재탄강표면산생단분자층흡부,병차만족Langmuir 흡부규률.ΔG 0<0,흡부과정자발진행;병차수착온도적승고ΔG 0증대,흡부작용강저.ΔH 0<0,표명반응시방열과정.ΔS0<0,수착흡부과정적진행,체계진입경위유서상태.
The corrosion inhibition of thiourea on carbon steel in 3%citric acid was investigated with different temperatures and different concentration of thiourea by weight-loss method. And the adsorption thermodynamics of thiourea on the surface of carbon steel was investigated in citric acid. The corrosion inhibition of thiourea increases with the increase of concentrations of thiourea;when its concentration reaches a certain concentration, corrosion inhibition remains basically unchanged. The results show that thiourea on the surface of carbon steel produces a single molecule layer absorption and meets the Langmuir adsorption rule.ΔG 0<0 show that the adsorption process is spontaneous;ΔG 0 increases and adsorption reduces with the increase of temperature.ΔH0<0 show that the reaction is exothermic chemical process.ΔS 0<0 show that the system turns into more orderly state with the process of adsorption.