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| 1 | Effect of Nano Clay on Corrosion Protection of Zinc-rich Epoxy Coatings on Steel 37显示文摘Epoxy zinc rich coatings containing clay nanoparticles were prepared and the effect of clay content on the cathodic protection performance of the coatings was evaluated by electrochemical impedance spectroscopy(EIS) and immersion test. Open circuit potential(OCP) measurements and immersion tests were also carried out to better understand the behavior of zinc rich coating. EIS and OCP measurements showed that addition of 1 wt% clay improved the cathodic protection duration and sacrificial properties of the epoxy zinc rich coating. Transmission electron microscopy(TEM) photographs confirmed that clay nanoparticles were successfully dispersed in the coating matrix loaded with 1 wt% clay. Immersion test results indicated that addition of 1 wt% clay nanoparticles in zinc rich epoxy coatings increased the cathodic protection ability of coatings. | Farhad Tohidi Shirehjini Iman Danaee Hadi Eskandari Davood Zarei | 2016 | Journal of Materials Science & Technology2016，32，11： | 9 |
| 2 | 酸性介质中桂圆壳碳点对碳钢的缓蚀性能研究显示文摘为开发环境友好、高缓蚀效率的新型缓蚀剂,以桂圆壳生物质为碳源,通过煅烧法和水热法分别合成桂圆壳碳点 (longan shell-CDs,ls-CDs) 和氮掺杂桂圆壳碳点 (N-lsCDs)。在此基础上,本文通过 FT-IR、XPS、TEM、电化学方法、荧光光谱分析 (FL) 和静态失重法等手段对其光学性质、结构组成和缓蚀性能进行了测定分析。结果表明:在1 mol·L^(-1)HCl 体系中,当 ls-CDs 和 N-lsCDs 的浓度为 100 和 20 mg·L^(-1)时,对Q235钢的缓蚀效率分别达到89.49%和92.41%。尤其是N-lsCDs,具有投加量低、原料废物利用、缓蚀性能优异的特点。极化曲线测试表明N-lsCDs为混合型抑制剂,并且N-lsCDs在碳钢表面的吸附符合Langmuir吸附等温式,同时存在物理吸附与化学吸附。利用生物质为原料制备环保新型缓蚀剂能够变废为宝,具有诱人的潜在应用前景。 | 陈佳起 侯道林 肖晗 高雨薇 董社英 | 2022 | 中国腐蚀与防护学报2022，42，4： | 8 |
| 3 | Adsorption isotherm and inhibition effect of a synthesized di-(m-Formylphenol)-1,2-cyclohexandiimine on corrosion of steel X52 in HCl solution显示文摘The potential of di-(m-Formylphenol)-1,2-cyclohexandiimine as an environmentally friendly corrosion inhibitor for steel was investigated in 1 mol/L HCl using potentiodynamic polarization, electrochemical impedance spectroscopy and chronoamperometry measurements. All electrochemical measurements suggest that this compound is an excellent corrosion inhibitor for mild steel and the inhibition efficiency increases with the increase in inhibitor concentration. The effect of temperature on the corrosion behavior of mild steel with the addition of the Schiff base was studied in the temperature range from 25 °C to 65 °C. It is found that the adsorption of this inhibitor follows the Langmuir adsorption isotherms. The value of activation energy and the thermodynamic parameters such as ΔHads, ΔSads, Kads and ΔGads were calculated by the corrosion currents at different temperatures using the adsorption isotherm. The morphology of mild steel surface in the absence and presence of inhibitor was examined by scanning electron microscopy(SEM) images. | A.karimi I.Danaee H.Eskandari M.RashvanAvei | 2016 | Journal of Central South University2016，23，2： | 4 |
| 4 | Lactobionic Acid as a New Synergist in Combination with Phosphonate-Zn(Ⅱ)System for Corrosion Inhibition of Carbon Steel显示文摘Studies on lactobionic acid introduced as a synergist in the presence of phosphonobutane-1,2,4-tricarboxylic acid(PBTC) and zinc ions for corrosion control of carbon steel in aqueous environment are presented.The investigations revealed that lactobionic acid(LBA) acts as an excellent synergist in corrosion inhibition.Optimum concentrations of all the three components of the ternary formulation are established by gravimetric studies.Potentiodynamic polarization studies indicate that the new ternary system is a mixed inhibitor.Impedance studies show that a protective film is formed on the metal surface in the presence of the inhibitor formulation.The film is found to exhibit its protective nature even at higher temperatures up to 60 °C.Analysis of the protective film by X-ray photoelectron spectroscopy(XPS) and reflection absorption Fourier transform infrared(FTIR) spectroscopy infers the presence of Zn(OH)_2,oxides and hydroxides of iron and the inhibitor molecules in the surface film probably in the form of a complex,[Zn(ll)—PBTC—LBA].The morphological studies by scanning electron microscopy(SEM) and the topographical studies by atomic force microscopy(AFM) also indicate the presence of protective film on the metal surface.A plausible mechanism of corrosion inhibition is proposed. | S.Srinivasa Rao B.V.Appa Rao S.Roopas Kiran B.Sreedhar | 2014 | Journal of Materials Science & Technology2014，30，1： | 2 |
| 5 | HCl介质中二苯乙酮咪唑啉季铵盐对碳钢的缓蚀行为及机制显示文摘目的合成一种二苯乙酮咪唑啉季铵盐(PPLB)化合物,研究其在0.5 mol/L HCl溶液中对Q235钢的缓蚀性能,探讨其吸附动力学过程及可能的缓蚀机制。方法以有机胺、硬脂酸、苯乙酮和氯化苄等为原料,经脱水环化、曼尼希反应和季铵化制备季铵盐。通过腐蚀失重、动电位极化曲线测试、电化学阻抗和表面形貌分析等手段,研究了二苯乙酮咪唑啉季铵盐在HCl介质中对Q235钢的缓蚀性能。结果HCl溶液中PPLB对碳钢具有优异的缓蚀性能,缓蚀效率随浓度和介质温度的升高而增加。在353 K下,PPLB添加量为4.8×10^(–4) mol/L时,缓蚀效率可达98.9%,表明缓蚀剂在高温酸性介质中仍可有效抑制碳钢的腐蚀。电化学研究结果证明,PPLB可同时降低阴阳极的腐蚀电流密度,即抑制了腐蚀的阴阳极过程,是一种通过“几何覆盖效应”起作用的混合型缓蚀剂,其在碳钢表面的吸附遵循Langmuir吸附等温规律,为典型的化学吸附。结论合成的二苯乙酮咪唑啉季铵盐化合物是一种优异的酸性介质缓蚀剂,独特的分子结构使其通过多中心化学吸附在碳钢表面生成保护性吸附膜,从而有效抑制了HCl对碳钢的腐蚀。 | 李文涛 吴浩 王璇 苑旭雯 曹扬 杨怀玉 | 2022 | 表面技术2022，51，1： | 1 |
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