盐水介质中环保型钼系钢铁缓蚀剂的研究

钼酸盐缓蚀剂缓蚀性能好,低毒、无磷、无公害,不会引起微生物的繁殖,适用于高温、高pH值和高硬度水运行,是一种高效环保型缓蚀剂,但其价格较贵,单独使用所需剂量大,成本高,如何降低其用量成为热点问题.本研究通过动态失重法研究钼酸钠与硅酸盐、硼酸盐复配缓蚀剂对碳钢在50℃下盐水介质中的缓蚀情况,降低钼酸钠的用量,得到缓蚀效果...     

技术市场——用于CO2的饱和的3％NaCl溶液中的中高温气-液缓蚀剂

一种以氨杂环季胺盐为主成份复配而成的气一液缓蚀剂，适用于CO2饱和的3％NaCl 水溶液环境中，在90℃较高温度条件下的缓蚀率≥95％。电化学测试结果表明，该缓蚀剂是以控制阴极腐蚀为主的阴极型缓蚀剂。     

绿色环保型软化水缓蚀剂的研究

针对软化水的强腐蚀性问题,研制了一种复合型软化水缓蚀剂MYN－4,该缓蚀剂不含NaNO2及其他有毒有害成分,为绿色环保型化学品;介绍了其研究过程和缓蚀机理及影响其缓蚀性能的因素;试验表明,MYN－4在高温,高含Cl^-、SO4^2-的软化水中缓蚀性能优良,是NaNO2理想的替代品。     

环保型多功能金属缓蚀剂

一种环保型多功能金属缓蚀剂改性肌醇六磷酸酯，已由河北省玉田县康庄新资源技术研究所研制成功。该缓蚀剂是由肌醇六磷酸酯经改性合成制得，具有优异的防腐抗锈性能和广泛的适用性，完全可以替代铬酸盐、亚硝酸盐、无机磷酸盐、钼酸盐及锌盐等成分作为水性防腐剂，对黑色金属、有色金属、合金材料进行防腐处理。     

盐水介质碳钢缓蚀剂的研究

以葡萄糖酸盐、醇胺磷酸酯、表面活性剂、添加剂等合成了盐水介质碳钢缓蚀剂并用腐蚀失重法进行了评价。在 22.5％盐水介质中,硫酸锌:葡萄糖酸钙:钼酸盐:硫脲:醇胺磷酸酯:十二烷基苯磺酸钠=3.0:1.0:0.5:0.2:0.2:0.05,50℃时,碳钢缓蚀 率可达98％以上。     

环保型金属缓蚀剂的研究进展

综述了近年来环保型金属缓蚀剂的研究进展.主要介绍了5种环保型金属缓蚀剂,总结了每种缓蚀剂的缓蚀机理,并对环保型金属缓蚀剂的发展趋势进行了展望.     

盐水介质铝合金复合缓蚀剂的研究

以葡萄糖酸盐、醇胺磷酸酯、苯并三氮唑(BTA)、表面活性剂、添加剂等合成了盐水介质铝缓蚀剂并用腐蚀失重法进行了评价。在22.5％盐水介质中,葡萄糖酸钙:苯并三氮唑:硫酸锌:醇胺磷酸酯:十二烷基苯磺酸钠=1.0:1.0:0.6:0.2:0.05,50℃时,铝缓蚀率可达95％以上。     

环保超薄型钢结构防火涂料

从环保型树脂乳液、阻燃剂、颜料等方面考虑 ,设计了超薄型钢结构防火涂料 ,产品已达到中国环境标志产品技术要求规定的各项有害物质限量指标。     

An environmentally friendly coating for corrosion protection of aluminum and copper in sodium chloride solutions

Triacetoxyvinylsilane (TAVS) has been used as precursor to prepare sol-gel under aqueous conditions for the surface treatment of aluminum and copper metals. The corrosion behavior of the sol-gel-treated metals has been investigated with cyclic voltammetry, potentiodyamic polarization and electrochemical impedance spectroscopy. Results from the electrochemical measurements have shown that the TAVS sol-gel-coated metal provided a better corrosion protection than the triethoxysilane (TES) sol-gel-coated metal due to the hydrophobic nature of vinyl group. Contact angle measurements have been conducted and the results have been applied to explain the degree of the corrosion protection of the coating film.     

Evaluation of cysteine as environmentally friendly corrosion inhibitor for copper in neutral and acidic chloride solutions

The efficiency of cysteine as a non-toxic corrosion inhibitor for copper metal in 0.6 M NaCl and 1.0 M HCl has been investigated by electrochemical studies. Potentiodynamic polarization measurements and electrochemical impedance spectroscopy “EIS” were used to study the effect of cysteine on the corrosion inhibition of copper. Inhibition efficiency of about 84% could be achieved in chloride solutions. The presence of Cu²⁺ ions increases the inhibition efficiency to 90%. Potentiodynamic polarization measurements showed that the presence of cysteine in acidic and neutral chloride solutions affects mainly the cathodic process and decreases the corrosion current to a great extent and shifts the corrosion potential towards more negative values. The experimental impedance data were analyzed according to a proposed equivalent circuit model for the electrode/electrolyte interface. Results obtained from potentiodynamic polarization and impedance measurements are in good agreement. Adsorption of cysteine on the surface of Cu, in neutral and acidic chloride solutions, follows the Langmuir adsorption isotherm. The adsorption free energy of cysteine on Cu (−25 kJ mol⁻¹) reveals a strong physical adsorption of the inhibitor on the metal surface.     

一种环境友好复配酸洗缓蚀剂的研制及性能研究

以2-巯基苯骈咪唑作为EDTA酸洗缓蚀剂的主体药剂,通过正交试验筛选出了高效、环境友好型缓蚀剂。采用失重法研究了其缓蚀性能,讨论了酸洗介质浓度、缓蚀剂浓度、温度、Fe3+对缓蚀性能的影响。Tafel极化曲线表明缓蚀剂为混合型缓蚀剂;交流阻抗谱法(EIS)阻抗谱出现"退化"现象,只表现出一个高频容抗弧,与空白溶液对比,容抗弧的形状几乎一致;在缓蚀效率方面,电化学实验结果与失重法实验结论基本一致。     

一种环保型阻垢缓蚀剂的性能

以聚环氧琥珀酸（PESA）、聚丙烯酸（PAA）、水解聚马来酸酐（HPMA）、苯并三氮唑（BTA）为原料,研制出一种新型具有环保功能的复合型高效阻垢缓蚀剂。通过正交试验确定该阻垢缓蚀剂中各组分的最佳浓度为：PESA(1.0 mg/L)/PAA(1.0 mg/L)/HPMA (0.6 mg/L)/BTA(0.5 mg/L)。分别采用鼓泡法、电化学试验和旋转挂片腐蚀试验研究了其阻垢缓蚀性能。试验结果表明,该阻垢缓蚀剂的阻垢率为92%,对A3碳钢、铜、不锈钢的缓蚀率分别达到了83%、97%、99%,动态模拟试验结果也显示该阻垢缓蚀剂满足循环冷却水运行要求。     

氯化钠对曼尼希碱型盐酸缓蚀剂缓蚀性能的影响

研究一种曼尼希碱盐酸缓蚀剂,在不同氯化钠含量的工业盐酸介质、不同温度、盐酸浓度以及缓蚀剂加量的条件下,通过失重法和电化学法测试了上述条件对曼尼希碱盐酸缓蚀剂缓蚀性能的影响,并对曼尼希碱盐酸缓蚀剂缓蚀机理和产生影响的原因进行了初步探讨。研究表明,盐酸介质中氯化钠含量对曼尼希碱盐酸缓蚀剂有一定影响,且随着氯化钠含量的增加,钢片的腐蚀速率升高。海上油田酸化施工海水配制酸液时,应考虑氯化钠对曼尼希碱盐酸缓蚀剂的影响。井下温度以及酸液浓度同样会影响缓蚀剂的缓蚀性能,可适当增加缓蚀剂的加量以达到降低腐蚀速率的效果。     

Sinapinic acid as Al–2.5Mg alloy corrosion inhibitor in sodium chloride solution

Sinapinic acid was studied for possible use as an Al–2.5Mg alloy corrosion inhibitor in a 0.5 mol dm⁻³ NaCl solution. Measurements were performed on a rotating disc electrode in a quiescent solution and at different electrode rotation rates and electrolyte temperatures. Electrochemical parameters for the Al–2.5Mg alloy were determined using polarization techniques and electrochemical impedance spectroscopy (EIS). The investigated compound acts as a cathodic-type inhibitor and the inhibition is ascribed to the adsorption of the inhibitor onto the electrode surface. The electrode coverage follows the Freundlich adsorption isotherm.     

Eco friendly inhibitor for corrosion inhibition of mild steel in phosphoric acid medium

The inhibition effect of Zenthoxylum alatum plant extract on the corrosion of mild steel in 20, 50 and 88% aqueous orthophosphoric acid has been investigated by weight loss and electrochemical impedance spectroscopy (EIS). Plant extract is able to reduce the corrosion of steel more effectively in 88% phosphoric acid than in 20% phosphoric acid. The effect of temperature on the corrosion behaviour of mild steel in 20, 50 and 88% phosphoric acid with addition of plant extract was studied in the temperature range 50-80 °C. Results on corrosion rate and inhibition efficiency have indicated that this extract is effective up to 70 °C in 88% phosphoric acid medium. Surface analysis (XPS and FT-IR) was also carried out to establish the mechanism of corrosion inhibition of mild steel in phosphoric acid medium.     

Voltammetric behaviour of iron in cement II: effect of sodium chloride and corrosion inhibitor additions

A method for studying the behaviour of iron reinforcement in cured Portland cement paste using linear sweep cyclic voltammetry is described. The use of this method is demonstrated for thein situ study of: (i) the formation of passive films on iron embedded in cement; (ii) the NaCl-induced disruption of these passive films; and, (iii) the protection of passive films on iron in salt-contaminated cement pastes by corrosion inhibitors. Disruption of the passivity was observed upon potential cycling following immersion of cement-embedded iron electrodes for 24h in solutions containing as little as 0.1M NaCl. Corrosion inhibitors such as sodium nitrite, potassium chromate and sodium benzoate all had some beneficial effect in maintaining the passivity of the iron electrodes in the presence of potentially damaging concentrations of NaCl. Of these inhibitors, sodium nitrite was the most effective at the levels used in this study.