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2,3,5-Triphenyl-2H-tetrazolium Chloride and 2,4,6-Tri(2-pyridyl)-s-triazine on the Corrosion of Mild Steel in HCl
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Electrochemical measurement, quantum chemical method, and scanning electron microscopy (SEM) were performed to investigate the inhibitive effect of 2,3,5-triphenyl-2H-tetrazolium chloride (TTC) and 2,4,6-tri(2-pyridyl) -s-triazine(TPT) on the corrosion of mild steel in lmol.L^-1 HCl at room temperature. Impedance spectroscopy measurement showed that the polarization resistance increased and that double layer capacitance decreased with the increase in the inhibitive concentration, and the results of potentiodynamic polarization showed that the inhibitors suppressed both cathodic and anodic processes of steel corrosion without change in the mecha-nism. Higher the orbital density distribution strength of the lowest unoccupied molecular orbital, higher is the molecule dipole, and lower energy gap between the energy of the highest occupied molecular orbital and the energy of the lowest unoccupied molecular orbital resulted in higher inhibitory efficiency. The results of SEM analysis showed that the metal-was protected from aggressive corrosion by the addition of TTC and TPT. 相似文献
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本研究应用响应面法优化植物乳杆菌KLDS 1.0391的高密度发酵参数。以玉米浆粉为培养基,活菌数为指标,在单因素实验基础上,采用中心组合实验设计优化发酵温度、发酵p H以及接种量。结果发现三个因素对发酵液中活菌数影响大小依次为:发酵温度>接种量>p H;获得的最优发酵参数为:发酵温度为34.7℃、p H为6.2、接种量为3.1%。在此条件下,发酵11 h后,发酵液中的活菌数达到9.58 lg CFU/m L,与模型预测值的相对误差为1.33%,差异不显著。说明所建立的模型能够较好地反映实际发酵情况。 相似文献
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The inhibiting effect of ciprofloxacin,norfloxacin and ofloxacin on the corrosion of mild steel in 1 mol·L-1 HCl and the mechanism were studied at different temperatures using mass loss measurement,electrochemical method,and X-ray photoelectron spectroscopy(XPS) .Effective inhibition was shown by mass loss,potentiodynamic polarization and impedance spectroscopy measurement.The corrosion rate of the metal in the mass loss measurement,and the corrosion reaction on cathode and anode in the electrochemical measurement were accelerated when temperature was increased.XPS results showed that the inhibitors adsorbed effectively on the metal surface. 相似文献
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喹诺酮药品对Q235钢在HCl溶液中缓蚀性能的影响 总被引:1,自引:0,他引:1
用失重法、极化曲线和交流阻抗等方法研究了喹诺酮类药品(诺氟沙星、氧氟沙星)对在1mol/L HCl溶液中的Q235钢的缓蚀性能和作用机理的影响.结果表明,所研究的两种喹诺酮类药品均具有较好的缓蚀性能,二者在有效浓度为3.5mmol/L时对碳钢的缓蚀效率分别为95%、92%,二者均为阳极抑制为主的的混合抑制型缓蚀剂.同时,还考察了温度对两种缓蚀剂的缓蚀性能的影响,结果是温度的升高不利于其缓蚀作用的发挥. 相似文献
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