国外海水及模拟海水中铜缓蚀剂的最新研究进展

叙述了海水及模拟海水中各种有机类铜缓蚀剂的国内外研究进展,阐述了有机类铜缓蚀剂的缓蚀机理机理,并展望了铜缓蚀剂新的研究和发展方向.认为应加强现有缓蚀剂品种的复配技术、加药顺序和绿色环保型缓蚀剂研究.对合成新型的有机铜缓蚀剂提出了一些看法.     

海水及模拟海水介质中铜缓蚀剂缓蚀机理的研究进展

阐述海水及模拟海水介质中各种有机类铜缓蚀剂的国内外研究进展和对各种有机类铜缓蚀剂的缓蚀机理和协同作用机理,并展望铜缓蚀剂新的研究和发展方向.     

有机铜缓蚀剂研究现状与进展

介绍了有机铜缓蚀剂的研究现状及发展趋势,叙述了缓蚀剂的缓蚀机理及一些实验结果,讨论了有机铜缓蚀剂较为理想的理论结构,对合成新型的有机铜缓蚀剂提出了一些看法     

钢铁及铁质文物有机缓蚀剂的研究进展

概述了钢铁有机缓蚀剂的特点、作用机理及研究现状.按照胺类缓蚀剂、硫脲及其衍生物、咪唑啉类缓蚀剂、苯并三氮唑缓蚀剂和醛类缓蚀剂5个种类,着重介绍了有机缓蚀剂的研究进展,并展望其在铁质文物保护中的发展趋势.     

国外有机类铜缓蚀剂综述

随着金属铜及其合金在各领域的应用越来越广泛，其腐蚀与防护问题日益受到重视，而在腐蚀介质中添加缓蚀剂是解决这一问题的一个简单实用的方法。作者综述了近年来国外几种新型有机铜缓蚀剂，包括唑类、喹啉类、嘧啶类等物质，从缓蚀性能、环境保护方面对其进行了比较，介绍了不同介质中缓蚀剂的选用情况，阐述了缓蚀剂的作用机理，并展望了缓蚀剂的研究和发展方向。     

有机类铜及其合金缓蚀剂的发展现状与展望

随着金属铜及其合金在各方面的使用越来越广泛,其防护问题也成为当前研究的热点问题之一。作者就有机类铜及其合金缓蚀剂种类、缓蚀机理、不同介质中缓蚀剂的选用情况以及当前国内发展现状进行了综述,并对其未来发展前景进行了展望。     

有机铜缓蚀剂研究现状与进展

介绍了有机铜缓蚀剂的研究现状及发展趋势,叙述了缓蚀剂的要理及一些实验结果,讨论了有机铜缓蚀剂较为理想的理论结构,对合成新型的有机铜缓蚀提出了一些看法。     

工业水处理无磷有机缓蚀剂专利技术进展

综述了工业水处理用有机胺类、咪唑啉类、氨基羧酸类和硫代羧酸类缓蚀剂的作用机理、制备方法和专利技术进展。通过对大量申请专利的技术分析,指出中国无磷有机缓蚀剂开发中存在的主要问题是原创性品种不足。建议根据分子结构和缓蚀性能的关系,设计一些新型无磷有机缓蚀剂分子并对现有无磷有机缓蚀剂分子进行化学反应改性,以增加高效无磷有机缓蚀剂新品种。     

有机缓蚀剂对低碳钢的缓蚀性能研究进展

概述离子液体、天然植物提取物、有机衍生物、新型希夫碱类缓蚀剂、药物类有机缓蚀剂对低碳钢在不同介质中缓蚀性能的国内外研究情况。介绍有机缓蚀剂机理,并且利用失重法、电化学法、表面分析等方法对其缓蚀性能进行分析,展望了在不同介质中对低碳钢有机缓蚀剂的研究方向。     

缓蚀剂作用机理研究进展

对常用的钝化膜型缓蚀剂、沉淀膜型缓蚀剂和吸附膜型缓蚀剂进行了概述,重点阐述了目前关于缓蚀剂作用机理的三种主要理论,即成膜理论、吸附理论和电极过程抑制理论,分析了钨酸盐、钼酸盐、有机膦酸盐、杂环类及复合型缓蚀剂作用机理的研究进展情况。     

水处理系统中铜缓蚀剂的应用研究

归纳总结了在水处理系统中常见的铜缓蚀剂的缓蚀机理及其在水处理系统中的应用，指出了常见的铜缓蚀剂应用中存在的一些问题：如低pH条件下BTA缓蚀效率下降、氧化性杀生剂对铜缓蚀剂的影响等，并介绍了有关铜缓蚀剂的一些研究和实验结果，最后指出了铜缓蚀剂研究的发展方向。     

Some phthalazin derivatives as non toxic corrosion inhibitors for copper in sulphuric acid

Phthalazin derivatives were tested as corrosion inhibitors of copper in 1 M H₂SO₄ using electrochemical polarization and weight loss techniques. This study monitored the evolution of the inhibitory effect of the phthalazin derivatives, according to their substituents. A significant decrease in the corrosion rate of copper was observed in the presence of the investigated inhibitors. The inhibition efficiency (%I) increases with increasing inhibitor concentration. The potentiodynamic polarization data indicated that, the inhibitors were of mixed type, but the cathodic effect is more pronounced. The slopes of the cathodic and anodic Tafel lines are approximately constant and independent on the inhibitor concentration. The mechanism of inhibition was discussed in the light of the chemical structure of the undertaken inhibitors. The adsorption on the copper surface follows the Langmuir isotherm model.     

耐卤素铜缓蚀剂的性能与应用

在循环冷却水处理方案中通常使用唑类作为铜及铜合金的缓蚀剂。唑类的性能和效果受唑类在冷却水中的稳定性以及在铜及铜合金表面成膜的稳定性和持续性的影响。影响唑类稳定性的一个重要的因素是在使用唑类缓蚀剂的冷却水系统中使用卤素来控制微生物。HRA是一种新的改性唑类铜缓蚀剂,与传统的唑类铜缓蚀剂相比较,具有更好的性能与稳定性。即使在使用卤素杀菌的冷却水系统中,其性能也很稳定,既可以作为铜缓蚀剂单独使用,也可以与其它缓蚀剂联合使用,为用户提供抗卤素氧化的腐蚀控制方案。比较了这种新的耐卤素唑类铜缓蚀剂(HRA)与传统唑类缓蚀剂的性能和特征。     

不同水质工况下电厂铜管的腐蚀

电厂铜材的腐蚀问题日益突出,引起铜腐蚀的原因是多方面的,其中水质工况是非常重要的因素之一.从水中主要阴离子、阻垢剂、缓蚀剂、微生物生长等方面探讨了不同水质工况下铜管的腐蚀作用.     

Surface analysis and adsorption behavior of caffeine as an environmentally friendly corrosion inhibitor at the copper/aqueous chloride solution interface

Abstract

Corrosion inhibitors based on environmentally friendly and harmless products are currently being studied and developed. The corrosion inhibition properties of caffeine (1,3,7-trimethylxanthine) on copper corrosion in aqueous chloride solution (3.5?wt.% NaCl) are analysed here using stationary and transient electrochemical methods, and a theoretical study based on density functional theory is carried out. Caffeine is a very competitive compared to the chemical inhibitors that are often used for copper protection. Electrochemical and impedance experiments reveal that the protective efficiency of caffeine reaches a value of 96% at a concentration of 10^?2?mol L^?1. Based on these results, the Langmuir model appears to be the best representation of the adsorption of caffeine onto the copper surface. Scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy and X-ray diffraction (XRD) were used to determine the surface morphology and the chemical composition of the copper surface in chloride media, in the absence and presence of caffeine. The results show the development of a mechanism of corrosion inhibition. In order to confirm the correlation between the inhibitory effect and the molecular structure of caffeine, quantum chemical parameters are used to calculate its electronic properties.     

火电厂铜合金凝汽器氯离子腐蚀及缓蚀剂研究综述

目前我国火力发电厂凝汽器材质以铜合金为主,而氯离子对铜合金凝汽器的腐蚀是火电厂循环冷却水系统的主要腐蚀性因素,直接关系到生产的安全运行.作者首先针对铜合金材质氯离子腐蚀评价方法及腐蚀机理进行了综述,然后对该类缓蚀剂的研究进展进行了系统归纳,涉及BTA及其衍生物以及MBT的论述,亦包括了其他唑类及非唑类缓蚀剂情况,同时对部分缓蚀剂的腐蚀控制机理进行了描述,旨在对铜合金材质氯离子的腐蚀及控制的现状及发展方向有一个系统的把握.     

Tosyl-hydrazine, 4-nitrobenzoyl-hydrazine and terephthalyl-hydrazine as inhibitors for the corrosion of copper and aluminium in sulphiric acid

The effect of tosyl-hydrazine (THy), 4-nitrobenzoyl-hydrazine (4-NBHy) and terephthalyl-hydrazine (terephthalyl-Hy) on the corrosion of copper and aluminium in sulphuric acid has been investigated. The inhibitive efficiency ranking of these compounds from both weight loss and polarization measurements was found to be terephthalyl-Hy > Thy > 4-NBHy for Cu and THy > 4-NBHy for Al. Both THy and 4-NBHy were found to be much less efficient as inhibitors for the corrosion of aluminium when compared to the corrosion of copper in sulphuric acid. The inhibitors acted cathodically both in the case of copper and aluminium, by merely blocking the cathodic reaction sites in the former and by altering the course of the mechanism of corrosion in the latter. The relative inhibitive efficiency of these compounds has been explained on the basis of structure dependent electron donor properties of the inhibitors and the nature of the metal-inhibitor interaction at the surface.