论文部分内容阅读
利用失重实验、动电位极化曲线测试、交流阻抗测试(EIS)及扫描电子显微镜(SEM)方法对吡哌酸(8-乙基-5-氧代-5,8-二氢-2-(1-哌嗪基)吡啶并[2,3-d]嘧啶-6-羧酸)、左氧氟沙星[(±)-9-氟-2,3-二氢-3-甲基-10-(4-甲基-1-哌嗪基)-7-氧代-7H-吡啶并[1,2,3-de][1,4]苯并恶嗪-6-羧酸]及环丙沙星[l-环丙基-6-氟-1,4-二氢-4-氧代-7-(1-哌嗪基)-3-喹啉羧酸]在303 K时0.5 mol/L H2SO4中对碳钢的缓蚀性能、作用机理进行研究.失重实验得出,303 K时试样浸泡在0.5 mol/L H2SO4溶液中的腐蚀速度随缓蚀剂的浓度增大而减小,同时三种缓蚀剂的缓蚀效率显著增大.电化学测试表明缓蚀剂分子对阴阳极反应均有抑制作用,但对阴极的抑制作用更加明显,其抑制作用与缓蚀剂在金属表面的覆盖有关.303 K时缓蚀剂在金属表面的吸附行为符合Langmuir等温线,且作用过程物理、化学吸附兼有.扫描电子显微镜观察结果表明,添加三种缓蚀剂对碳钢表面的腐蚀起到了显著的保护作用.同种条件下的测试结果表明,环丙沙星缓蚀性能最强.
The effects of pethidine (8-ethyl-5-oxo-5,8-dihydro-2- L- piperazinyl) pyrido [2,3-d] pyrimidine-6-carboxylic acid), levofloxacin [(±) -9- fluoro-2,3- dihydro-3- methyl-10- (4- Piperazinyl) -7-oxo-7H-pyrido [1,2,3-de] [1,4] benzoxazine-6-carboxylic acid] and ciprofloxacin [1 -cyclopropyl-6-fluoro-1,4-dihydro-4-oxo-7- (1-piperazinyl) -3-quinolinecarboxylic acid] Carbonyl The corrosion inhibition and the mechanism of the steel were studied.The weight loss experiment showed that the corrosion rate of the sample immersed in 0.5 mol / L H2SO4 solution at 303 K decreases with the concentration of the corrosion inhibitor, The corrosion inhibition efficiency of the agent is significantly increased.Electrochemical tests show that the inhibitor molecules have inhibitory effects on both the anode and the cathode but have a more pronounced inhibitory effect on the cathode and the inhibition is related to the corrosion inhibitor coverage on the metal surface.303 K adsorption behavior of corrosion inhibitor on the metal surface in line with the Langmuir isotherm, and the role of physical, chemical adsorption both. Scanning electron microscopy showed that the addition of three Corrosion inhibitor for steel surface played a significant protective effect. The test results show that under the same kinds of conditions, most of ciprofloxacin inhibition performance.