加替沙星在3%HCl介质中对碳钢的缓蚀作用  

Corrosion Inhibition of Gatifloxacin on Mild Steel in 3% HCl Solution

作　　者：吴锋景[1] 夏靖[1] 刘小娟[1] 翟文奎 袁祥[1] 姚俊合 肖鑫[1] 

机构地区：[1]湖南工程学院化学化工学院,湘潭411104

出　　处：《腐蚀科学与防护技术》2016年第6期560-564,共5页Corrosion Science and Protection Technology

摘　　要：采用失重法、电化学方法研究了加替沙星对碳钢在酸性溶液中的缓蚀行为,用扫描电镜观察了碳钢表面的腐蚀形貌,并结合热力学讨论了其缓蚀机理。结果表明,浓度为700 mg/L的加替沙星对碳钢在3%HCl溶液中有高达95.6%的缓蚀作用。加替沙星为混合型缓蚀剂,能同时抑制碳钢的阴、阳极反应过程。吸附热力学研究表明加替沙星在碳钢表面的吸附符合Langmuir等温式,属于物理吸附和化学吸附共同作用的结果,吸附过程放热且熵增。The inhibition effect of gatifloxacin on the corrosion of mild steel in 3% HCl solution was investigated by means of mass loss measurements and electrochemical measurements. The surface morphology of the steel after corrosion was studied by scanning electron microscope（SEM）.The results demonstrated that the highest inhibition efficiency of gatifloxacin reached 95.6% for a dose of gatifloxacin 700 mg/L. Gatifloxacin acted as a mixed-type inhibitor, the cathodic and anodic processes of corrosion were suppressed. Thermodynamic parameters were acquired from data of weight loss at different experimental temperatures, which suggested that the adsorption of gatifloxacin on metal surface obeyed Langmuir adsorption isotherm model. The adsorption processes were exothermic, and belong to chemisorption and physisorption. The entropy of adsorption processes increased.

关 键 词：加替沙星 电化学 Langmuir吸附等温式 缓蚀剂 

分 类 号：TG174.42[金属学及工艺—金属表面处理]