铜及其合金的新型水溶性缓蚀剂TACM

一、引言近十多年来,对铜及其合金的缓蚀剂研究较多,然而引人注目有实用价值的铜及其合金用水溶性缓蚀剂的品种为数甚少。资料表明某些有机杂环化合物(主要为唑类)是铜及其合金的有效缓蚀剂。但是,杂环化合物通常存在水溶性问题;比如,常用的铜合金缓蚀剂巯基苯骈噻唑(MBT)就难溶于水,在pH低于6的水溶液中几乎不溶,缓蚀效率随pH值降低而下降。因而,目前     

BTA及其复配铜缓蚀剂的研究进展

综述了铜合金缓蚀剂BTA的研究进展和缓蚀机理,重点介绍了BTA复配缓蚀剂的研究情况及复配缓蚀剂的协同效应,如BTA与无机缓蚀剂、稀土盐缓蚀剂、有机缓蚀剂之间的复配应用及其缓释机理.BTA被用作铜及其合金的缓蚀剂具有较好的缓蚀效果,但有毒且用量大,绿色环保型复配缓蚀荆的研究和应用是铜合金缓蚀荆发展的必然趋势.     

钼酸盐应用于有色金属缓蚀的研究进展

钼酸盐具有低毒、缓蚀的特点,越来越多地应用于铝、镁、铜、锌及其合金的腐蚀防护中.综述了钼酸盐缓蚀剂在铝、镁、铜、锌等有色金属及其合金腐蚀防护应用研究方面取得的最新成果和进展,并指出了未来发展的方向.     

邻菲罗啉及其衍生物对盐酸中铜的缓蚀性能

邻菲罗啉(PHEN)及其衍生物可有效抑制金属及其合金在酸性介质中的腐蚀,但目前还未见其对铜材缓蚀的报道。采用失重法及扫描电镜(SEM)研究了PHEN及其衍生物2-苯基-1H-咪唑[4,5-f][1,10]邻菲罗啉(PIPH)这2种有机缓蚀剂在1 mol/L HCl溶液中对铜的缓蚀作用,并对其缓蚀机理进行探讨。结果表明:当缓蚀剂浓度为1.0 mmol/L、温度为30℃,吸附成膜时间4 h,2种缓蚀剂在1 mol/L HCl溶液中的缓蚀效率均达最大值,PHEN和PIPH对铜的缓蚀效率可分别达到96.4%和99.7%;2种缓蚀剂在铜表面的吸附均符合Langmuir吸附模型,且均为化学吸附。     

溴化锂吸收式制冷机中铜及其合金的缓剂研究发展

在溴化锂吸收式制冷机系统中使用的LiOH、Li2MoO4、Li2CrO4、LiNO3和C6H4N3H等缓蚀剂对铜及其合金的缓蚀效果及机理进行了扼要综述,并对其发展动态和应用前景进行了展望.     

溴化锂制冷机中铜及其合金缓蚀剂的应用与发展

溴化锂吸收式制冷机中使用的LiOH、Li2 MoO4、Li2 CrO4、LiNO3 和C6H4N3 H及复杂的过渡金属聚合物等缓蚀剂对铜及其合金的缓蚀效果及机理进行了扼要综述 ,并对其发展动态和应用前景进行了展望。     

无机酸乙醇胺盐系列缓蚀剂的研究与应用

无机酸乙醇胺盐被广泛于金属加工液、冷却水系统、涂料及食品工业中，作为金属部件的腐蚀抑制剂以及金属运输与贮存期间的气相防锈剂。它们与其他物质复配可有效地保护钢、铁、镍、铝、铜等多种金属及其合金。按无机酸根分类，系统总结了多种无机酸乙醇胺盐缓蚀剂的应用情况及其缓蚀作用机理。     

含盐体系中有机铜缓蚀剂的研究进展

叙述了含盐体系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和协同作用机理,并展望了铜缓蚀剂新的研究和发展方向。认为应利用现代先进的分析测试技术从分子和原子的水平上研究缓蚀剂在铜表面的行为和作用机理,加强现有缓蚀剂品种的复配技术和绿色环保型缓蚀剂研究。     

发电机内冷水中铜缓蚀剂研究

针对发电机空心铜导线的腐蚀问题，研究一种新型铜缓蚀剂。结果表明，该缓蚀剂与目前常用的铜缓蚀剂相比，具有更好的保护效果，是一种主要阻滞阳极过程的混合型缓蚀剂。     

复合气相缓蚀剂对纯铜缓蚀的研究

铜应用广泛,但在湿度较高的腐蚀性介质中其易被腐蚀,采用苯骈三氮唑(BTA)和酚类W制成一种新型复合气相缓蚀剂,采用原子分光光度计和电化学测试方法、扫描电镜和激光拉曼显微镜研究了该复合气相缓蚀剂对纯铜的缓蚀性能及其缓蚀机理.结果表明,该复合气相缓蚀剂在铜表面形成的膜是一种自组装缓蚀膜,具有很好的防蚀和拒水性能.     

环保型铜及其合金化学抛光与钝化新工艺

为了提高铜及其合金的表面抗变色能力,研制了一种环保的化学抛光工艺和含稀土盐的新型钝化工艺.对抛光与钝化后的试件进行检验,并利用硝酸点滴法及扫描电镜对钝化膜进行了检测,介绍了各组分在抛光液与钝化液中的作用机理,最后简述了常见问题与解决办法.     

铜及铜合金在泥沙海水中的腐蚀研究

介绍了 9种铜及铜合金在舟山海域暴露 1、2、4、8a的腐蚀结果 ,并通过室内模拟泥沙海水的加速腐蚀试验 ,研究了这些铜及铜合金在泥沙含量分别为 0 ,0 .75‰ ,1 .5‰的海水中的冲刷腐蚀行为及海水的泥沙含量对铜及铜合金的腐蚀形貌和腐蚀率的影响。结果表明 ,海水中泥沙的存在会加剧铜及铜合金的腐蚀 ,海水的泥沙含量对铜及铜合金腐蚀的影响程度随合金的不同有很大变化。     

Corrosion resistance of Al–Li alloys

Abstract

Experiments designed to investigate the corrosion resistance of several lithium-containing aluminium alloys are described. Intergranular corrosion was investigated using the NAWL test, exfoliation corrosion using the EXCO test, and stress corrosion using the C-ring test. It was found that intergranular corrosion varied with extrusion parameters and was more severe in copper-containing alloys. Alloys containing less than 0·4% Cu were not susceptible to stress corrosion. In alloys that failed, susceptibility increased as the aging treatment was extended from the underaged to the peak aged temper and also with increasing copper content. The addition of copper to ternary Al–Mg–Li alloys also increased the exfoliation corrosion attack.

MST/494     

Das Verhalten von Aluminium-Werkstoffen in der Hausinstallation

The corrosion behaviour of aluminium alloys . The corrosion behaviour of the aluminium alloys AlMgMn, AlMgSi 0,8 and AlZn 1 was investigated at two temperatures in two natural waters with different contents with and without oxygen. These measurements were performed as well separated as in contact with copper, brass, iron and zinc; the electrode potentials and the galvanic currents were measured and registrated. The results of the metallographic investigations concerning pitting corrosion of the aluminium samples and of the measurements under potentiostatic conditions were summarized in especial corrosion diagrams. Out of these the corrosion risks of the aluminium materials can be seen. The investigated aluminium alloys – except AlZn 1 – showed unpolarized a good corrosion resistance. The best of them was AlMgMn. In contact with iron and copper containing alloys aluminium were polarized in anodic direction depending of the different metals and of oxygen content of the water. The limit of the pitting corrosion has been exceeded at times. In the cold waters zinc polarized the aluminium alloys cathodic. References were given for applications of aluminium building parts in the home installation and it was informed about experiences which corresponds with these results.     

Natural products as corrosion inhibitor for metals in corrosive media — A review

The use of inhibitors for the control of corrosion of metals and alloys which are in contact with aggressive environment is an accepted practice. Large numbers of organic compounds were studied and are being studied to investigate their corrosion inhibition potential. All these studies reveal that organic compounds especially those with N, S and O showed significant inhibition efficiency. But, unfortunately most of these compounds are not only expensive but also toxic to living beings. It is needless to point out the importance of cheap, safe inhibitors of corrosion. Plant extracts have become important as an environmentally acceptable, readily available and renewable source for wide range of inhibitors. They are the rich sources of ingredients which have very high inhibition efficiency. This article gives a vivid account of natural products which are used as corrosion inhibitors for various metal and alloys in aggressive media.     

溴化锂吸收式制冷机中铜及其合金的腐蚀研究进展

对溴冷机换热器中常用的铜及其合金在高温,高浓度溴化锂溶液中的全面腐蚀,局部腐蚀和冷却水侧的腐蚀行为研究进行了扼要综述,并对其应用前景进行了展望。     

Electrochemical determination of the corrosion resistance of noble dental casting alloys

Forty-four dental casting alloys and pure metals have been evaluated for corrosion resistance in an artificial saliva. The electrochemical tests included measurement of the rest potential and tracing of polarization curves. Qualitative comparisons of the normalized polarization curves, and quantitative determination of corrosion resistance, and of corrosion and breakdown potentials, provided complementary means of evaluation. Alloys were assigned two families: alloys for crowns and bridges (C&B alloys), and alloys for ceramic veneering (PFM alloys). Among these two families, groups were based on the gold-content (high and low), and on the main non-gold component: silver for C&B alloys, and palladium for PFM alloys. Pure metals and some non-noble alloys have been included as references. From this study, it clearly appears that the PFM alloys, having a higher content of noble metals, are more corrosion resistant than the C&B alloys containing copper and silver. Some relationships between noble-metal content and electrochemical parameters such as rest potential and corrosion resistance, have been identified, but the strength of the correlations is somewhat lowered by the influence of additional parameters, such as the presence of non-noble components or the nature of the microstructure. The present investigation is part of a larger study including other electrochemical parameters as well as various biocompatiblity tests on the same set of 44 alloys.     

Corrosion evaluation of Au-Cu-Pd ternary alloys

The corrosion resistivity of single-phase Au-Cu-11 at% Pd alloys was evaluated by using a parameterQ which represented the total amount of anodic reaction in a potentiostatic polarization test. The result was compared with those for binary Au-Cu, ternary Au-Cu-11 at % Ag and some commercial alloys. The validity of usingQ as a corrosion parameter was confirmed by the good agreement between the analysed and calculated values of copper ion dissolved into the test solution. By replacing a part of the copper in Au-Cu alloys with palladium the corrosion resistivity can be greatly improved, but silver has no such significant effect. The value ofQ decreased by both treatments of homogenization and grain refinement of the alloy. One of the advantages of the alloy having a single-phase structure is that inhomogeneity in the distribution of the constituents is small even in the as-cast state, which results in a small galvanic effect.