天然植物绿色缓蚀剂的发展与应用

综述了国内外从天然植物中提取绿色缓蚀剂的研究历程,并展望了其发展趋势:从天然植物中提取、分离、加工新型绿色缓蚀剂的有效成分,进一步研究植物型绿色缓蚀剂作用机理,绿色缓蚀剂的复配以及高新科技在植物缓蚀剂研发时的应用是未来植物型缓蚀剂发展的重要方向。     

天然绿色缓蚀剂研究进展

本文针对天然动植物提取缓蚀剂以及药物缓蚀剂的发展进行了阐述并对天然对环境友好缓蚀剂进行了展望。     

绿色酸洗缓蚀剂的研究进展

详述了绿色酸洗缓蚀剂的研究进展,主要介绍了天然植物缓蚀剂和氨基酸类缓蚀剂等用于酸性介质中的绿色缓蚀剂,并分别从植物的叶子提取缓蚀剂,植物的花、种子及果实等提取缓蚀剂,天然有机高分子缓蚀剂及氨基酸类缓蚀剂进行阐述。开发缓蚀效率高、环保无公害、价格低廉的绿色酸洗缓蚀剂是工业生产中酸洗领域未来发展的方向。     

海水循环冷却水系统中绿色碳钢缓蚀剂的研究进展

详述了国内外海水循环冷却水系统中绿色碳钢缓蚀剂的研究进展,主要从葡萄糖酸盐系缓蚀剂、钼酸盐系缓蚀剂、钨酸盐系缓蚀剂和植物提取类缓蚀剂进行了阐述,展望了未来海水缓蚀剂的开发研究前景。     

绿色缓蚀剂对金属铝的缓蚀性能研究进展

两性金属铝因其优异性能而广泛应用于电工电子等多个领域,但当p H5时或p H9时,铝会被腐蚀,这两种情况下都需要添加缓蚀剂来减少铝的腐蚀。本文首先介绍了缓蚀剂的概念及分类,然后综述了缓蚀剂对金属铝在不同介质中的缓蚀作用机理,接着综述了绿色缓蚀剂对金属铝在不同介质中的缓蚀性能的研究进展,总结其缓蚀规律。展望了将来金属铝基绿色缓蚀剂的具体发展方向。     

天然绿色缓蚀剂的研究

采用某种植物制备水解液,然后调配不同浓度的缓蚀剂,采用失重法研究在不同浓度,不同温度下对A3的腐蚀情况,并计算腐蚀速率和缓蚀率.实验结果表明,绿色缓蚀剂有良好的缓蚀效果.     

绿色金属缓蚀剂及其应用

金属缓蚀剂是工业领域内应用非常广泛的助剂，也是金属腐蚀防护的重要方法之一。本文介绍了几种常用的绿色金属缓蚀剂及其缓蚀机理，并对环保型金属缓蚀剂的发展进行了展望。     

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。     

环境友好的天然缓蚀剂

分别对不同植物中的提取物制备的缓蚀剂的缓蚀性能进行测试。根据以前文献的记载的结构推论，选择那些含有N，S，O，不饱和键成分的植物在Soxlet装置中用异丙醇提取。某些植物液还要用染料上色。缓蚀剂性能的测定是在30℃上1MHCl溶液中A38碳钢上进行的，采用固定间隔时间，电极化和阻抗等方法进行分析，所有提取物按5wt%标准浓度配制缓蚀剂进行缓蚀效果测试。都具有很高的腐蚀抑制率（90-96%）。大蒜和蒲公英的提取物被证明是最有效的缓蚀剂。几种看作是有效的缓蚀剂在单独作用时其浓度不足以提供如此高的缓蚀保护。可以推测缓蚀剂间具有增效作用。协同效果非常可能。因为培养液是从复杂的生物系统中获得的，含有大量电化学活性成分。     

Effect of inorganic corrosion inhibitors on the caking properties of coking coals

The caking properties of two Western Canadian coking coals were affected by treatment with some inorganic corrosion inhibitors in high concentrations at room temperature. Leaching the coals with water resulted in removal of adsorbed inhibitor and hence, restoration of caking properties. Treatment of coals at room temperature with inhibitors in ‘normal’ concentrations and at a pressure of 10 350 kPa did not affect the caking properties to any significant extent. Treatment of the coals with low concentrations of inhibitors at 10350 kPa and 96 °C resulted in marked changes in the caking properties which were irreversible on leaching with water. In this case, a definite reaction took place between the coals and the inhibitors. Microscopic examination of the original coals and samples treated with inhibitors showed a greater number of fine particles and partial oxidation for coals tested at 10350 kPa and 96 °C.     

Atmospheric corrosion inhibitors for copperin the electronics industry

Inhibiting efficiencies of various imidazole derivatives on atmospheric corrosion of copper on printed circuit boards were investigated. Experiments were carried out on double sided copper boards using a procedure based on international standards and applied in the electronics industry. Electrochemical measurements were performed on copper in solutions containing imidazole derivatives, under stationary and flow conditions. The influence of flow velocity and temperature on the inhibiting characteristics was investigated. The imidazole derivatives studied have good inhibiting properties for copper against atmospheric corrosion.     

绿色表面活性剂的研究进展

从表面活性剂的分类、性能以及对人体和环境产生的影响等方面介绍了目前国内外绿色表面活性剂的研究热点。根据绿色表面活性剂在反应中降解方式的不同,概述了生物表面活性剂、可降解表面活性剂及反应型表面活性剂的定义、性能以及相关应用。同时,对表面活性剂的发展方向及绿色表面活性剂的应用前景进行了展望。     

新型酸性介质有机缓蚀剂研究进展

本文介绍了缓蚀剂在酸性介质中的应用,概述了有机缓蚀剂缓蚀机制研究的现状.由于环保的要求,有机缓蚀剂正朝着高效、低毒的方向发展,本文着重叙述了当前研究比较热门的三种新型有机缓蚀剂,并展望了有机缓蚀剂的发展趋势.     

酸洗缓蚀剂的应用研究现状及发展趋势

概述酸洗和酸洗缓蚀剂对于热力设备的重要性，综述国内外酸洗缓蚀剂的研究状况及酸洗缓蚀剂的种类，文中针对工业生产中的不同情况，列举了硫酸酸洗缓蚀剂、盐酸酸洗缓蚀剂、氢氟酸酸洗缓蚀剂、硝酸酸洗缓蚀剂的应用现状，并阐明酸洗缓蚀剂的缓蚀机理及其发展趋势。     

绿色、天然、有机产品大有可为

论述了天然有机产品的市场概况,并对其市场进行了分析。介绍了最新推出的天然有机产品。指出天然有机产品依然大有可为,但是各大公司必须找到忠实的消费者,传递正确的信息。     

绿色环保意识的趋向

随着消费者环保意识的提高,人们除了认清绿色环保能对社会和全世界起到巨大的促进作用,还认为绿色环保能够直接、积极地反映其社会地位,在某种程度上反映出消费者自己的绿色环保意识。介绍了消费者对"绿色化"的认识,对"绿色产品"的期望以及生产厂家对"绿色原料"的认证和对"可持续发展"所做的贡献。     

Investigation of some oleochemicals as green inhibitors on mild steel corrosion in sulfuric acid

The inhibitive effect of four oleo chemicals (namely; 2-Pentadecyl-1,3-imidazoline (PDI), 2-Undecyl-1,3-imidazoline (UDI), 2-Heptadecyl-1,3-imidazoline (HDI), 2-Nonyl-1,3-imidazoline (NI)), regarded as green inhibitors, were studied for the corrosion protection of mild steel in 0.5 M H₂SO₄. The methods employed were weight loss, potentiodynamic polarization and electrochemical impedance techniques. Scanning electron microscopy (SEM) was carried out on the inhibited and uninhibited metal samples to characterize the surface. The purity of synthesized inhibitors was checked by FT-IR and NMR studies. The inhibition efficiency increased with increase in inhibitor concentration, immersion time and decreased with increase in solution temperature. No significant change in IE values was observed with increase in acid concentration. The best performance was obtained for UDI possessing 96.2% inhibition efficiency at 500 ppm concentration. The adsorption of the compounds on the mild steel surface in the presence of sulfuric acid obeyed Langmuir’s adsorption isotherm. The values obtained for free energy of adsorption and heats of adsorption suggest physical adsorption. The addition of inhibitor decreased the entropy of activation suggesting that the inhibitors are more orderly arranged along the mild steel surface. The potentiodynamic polarization data indicate mixed control. The electrochemical impedance study further confirms the formation of a protective layer on the mild steel surface through the inhibitor adsorption.