Download or read book A Surface Analytical Chemistry Approach to Copper Corrosion and Its Inhibition with Benzotriazole Derivatives in Oil filled Power Transformers written by Marco Facciotti and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation Into the Interaction of Benzotriazole with Copper Corrosion Minerals and Surfaces written by L. B. Brostoff and published by . This book was released on 1997 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book In Situ Investigation of the Inhibition of Copper Corrosion by Benzotriazole and Tolytriazole written by Craig R. Walker and published by . This book was released on 1986 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Benzotriazole as a Corrosion Inhibitor for Copper written by N. H. Tohala and published by . This book was released on 1975 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Corrosion of Copper Tin and Their Alloys written by Henry Leidheiser and published by . This book was released on 1971 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Corrosion Inhibitors For Archaeological Copper written by Moahmed Ghoniem and published by LAP Lambert Academic Publishing. This book was released on 2012 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: Copper is amongst the earliest metals known to the man, having been used from prehistoric times. In archaeological environments, corrosion of copper is extremely variable and complex, and after excavation copper remains susceptible to corrosion. The possibility of Effective inhibitors use has attracted a certain amount of interest. However, there is one inhibitor in general use in conservation for stabilization of copper and copper alloys artifacts, this inhibitors is Benzotriazole. Other inhibitors were tested for using in the inhibition of copper and copper alloys such as; 2-Aminopyrimidine (AP), 2-Mercaptobenzotriazole (MBT), 2-amino-5-mercapto- 1,3,4-thiadiazole (AMT), Tolytriazole (TT) and Sodium Meta Silicate. In this study, a group of new industrial and pre-tested corrosion inhibitors imparted to pre-corroded and corroded copper samples using aggressive testing method. They were tested by a quantitative corrosion testing procedure that developed with the aim of calculating corrosion protection in percent so as to use the best in conservation.
Download or read book Benzotriazole written by Copper Development Association (Great Britain) and published by . This book was released on 1970* with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Inhibition of Copper Corrosion by Surface Modification written by Yvonne Yanwen Duan and published by . This book was released on 1995 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Inhibition of Copper Corrosion by Azole Compounds in Aqueous Environments written by Robin Ann Johnson and published by . This book was released on 1986 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biotransformation Potential and Uncoupling Behavior of Common Benzotriazole Based Corrosion Inhibitors written by Ivette Z. O'Brien and published by . This book was released on 2002-01-01 with total page 159 pages. Available in PDF, EPUB and Kindle. Book excerpt: Benzotriazole and its derivatives form strong complexes with transition metals and are the most widely used type of industrial corrosion inhibitor. Benzotriazole derivatives are present in high concentrations in deicing fluids, industrial cooling water systems, and antifreeze. Benzotriazoles are produced and applied in large quantities; total domestic production was 107(7) kg in 1977, and their use has markedly increased since. A recent USOS reconnaissance of 139 freshwater streams nationwide, found that 1/3 of them contained a single benzotriazole derivative (5- Methylbenzotriazole (MeBT)) in significant concentrations. Benzotriazole derivatives have been implicated as possible carcinogens, endocrine disempters, and plant hormone regulators, but the literature on their biological activity is dated and tenuous. More recently, acute toxic responses to benzotriazoles have been observed in MlCROTOX'M assays at concentrations less than 10 mg/L.
Download or read book Corrosion Resistance of Copper and Copper Alloys written by Michael Schütze and published by Wiley-VCH. This book was released on 2011-11-30 with total page 752 pages. Available in PDF, EPUB and Kindle. Book excerpt: Copper and its alloys have been utilized for more than 10,000 years. Today, copper is one of the most commonly used metals in the world; 24 million tons are consumed worldwide. A wide variety of copper alloys are used in a range of applications. As well as good mechanical properties, the excellent electrical conductivity and thermal conduction are reasons copper alloys are deployed in many industrial fields. Copper plays a role in electronic and electrical applications and all forms of heat transfer. In automobiles as well as in houses copper could not be replaced. In the sanitary industry copper and brass are well established, for example, drinking water pipes have been used for decades without problems. While the corrosion resistance of copper and its alloys is excellent in unpolluted air and drinking water, corrosion rates in impure environments can be much higher and lead to severe material damage. Corrosion is a system property, so it is important to find the right copper material with regard to the environmental conditions it will be exposed to. This handbook highlights the limitations of the use of copper and its alloys in various corrosive solutions and provides vital information on corrosion protection measures.
Download or read book Aging Stressing and Solderability of Electroplated and Electroless Copper written by and published by . This book was released on 1995 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: Organic inhibitors can be used to prevent corrosion of metals have application in the electronics industry as solderability preservatives. We have developed a model to describe the action of two inhibitors (benzotriazole and imidazole) during the environmental aging and soldering process. The inhibitors bond with the metal surface and form a barrier that prevents or retards oxidation. At soldering temperatures, the metal-organic complex breaks down leaving an oxide-free metal surface that allows excellent wetting by the molten solder. The presence of the inhibitor retards the wetting rate relative to clean copper but provides a vast improvement relative to oxidized copper.
Download or read book Antimicrobial Efficacy of Copper Alloys in Changing Environmental Conditions written by Jutta Ehlert Elguindi and published by . This book was released on 2011 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: Copper cast alloys de-activate antibiotic-resistant bacteria on contact and could be very effective in decreasing potentially harmful microorganisms in the environment. In this study copper alloys with varying copper contents were utilized to evaluate their antimicrobial effects on Pseudomonas aeruginosa, Escherichia coli, and Enterococcus faecium in changing environmental conditions. The survival rates of P. aeruginosa wild type and its derivative transposon mutants of the cin operon on copper cast alloys were investigated in order to demonstrate the influence of genes involved in copper resistance. The gene disruption of the response regulator of the cin operon resulted in shorter survival rates on copper alloys, which was also influenced by temperature and method of exposure. Bacteria often have acquired copper resistance mechanisms in order to withstand higher copper concentrations in their surroundings, which may be a factor in their survival rates on copper surfaces. Copper- and antibiotic-resistant E. coli and E. faecium strains were obtained from pigs raised on feeds containing copper sulfate and antibiotics. Survival rates of these bacteria were influenced by the percentage of copper in the alloys, varying moisture conditions on copper surfaces, suspension media used, and differences between strains. Survival was also dependent on copper corrosion rates since corrosion inhibition with benzotriazole or a thick surface layer of thermal oxide resulted in prolonged survival on copper surfaces. Corrosion of copper surfaces releases copper ions which directly affect bacterial survival on copper alloys. The results obtained in this study emphasize that copper alloys are effective as antimicrobial materials but changing environmental conditions can significantly influence bacterial survival on copper surfaces. These findings can be applied to a better utilization of copper alloys in water, food, and healthcare environments. Antibiotic- and copper ion-resistant bacteria can be killed on contact with copper alloys which makes the proliferation of these microorganisms less likely and reduces the risk to human health. However, in a very different environment copper ion-resistant microbes can be useful for plant-microbe associations in bioremediation of copper mining wastelands.
Download or read book Corrosion Protection of Copper in Oily Media Microscopic Mechanisms written by Avidipto Biswas and published by . This book was released on 2013 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tolyltriazole (TTAH) is an extensively used industrial-grade corrosion inhibitor (CI) for Cu. This PhD project developed an understanding on the microscopic mechanisms for the TTAH adsorption on Cu, and the effective protection against sulfide-attack in oily medium analogous to automotive lubricants. XPS and ToF-SIMS characterization were carried out on TTAH adsorption films formed on pristine Cu surfaces immersed in 0.01 wt. % TTAH oil solution at room temperature for immersion times ranging from 1 s to 0.6 Ms. Instantaneous complete coverage of the Cu surface by TTAH is revealed by ToF-SIMS. In Tougaard analysis of XPS spectra, the adsorption film morphology is best described by a uniform-layer model assuming a film thickness of 2.5 nm after 86.4 Ks. Depth-profiling in ToF-SIMS and ARXPS provide evidence for two distinct adsorption configurations for TTAH on Cu {u2013} polymerized layer, and monomer layer. TTAH adsorption is found to take place on Cu2O. Studying the time-dependent evolution of the surface film suggests a kinetics-controlled mechanism involving two competing reactions: oxidation of Cu to Cu2O, and TTAH-Cu complex formation. The TTAH-Cu complex formation proceeds at the cost of Cu2O. The structure and the chemical-composition of the surface film fluctuate with reaction time. Studying the corrosion of Cu in sulfide solution at 80C in the absence of TTAH suggests that the oxidation of Cu to Cu2O is kinetically favored over Cu corrosion by sulfide attack. The incubation time for the sulfide-attack decreases with increasing S concentration. Two distinct sulfide corrosion products are identified {u2013} Cu2SO4, forming at the oxide interface, and Cu2S, forming atop. The presence of TTAH significantly impedes the extent of sulfide-attack. At 80C, the TTAH adsorption film is substantially thicker than that of room temperature. This suggests that the rate-determining step for the formation of the adsorption film is the outward diffusion of Cu from the substrate. At this temperature, the TTAH adsorption film also reveals a substantially lower degree of polymerization. In the presence of TTAH, both oxidation and sulfide related corrosion of Cu occur underneath the CI adsorption film. The TTAH adsorption film preferentially allows the transport of O through it, leading to the formation of a substantial Cu2O under-layer, while blocking the sulfide radicals. The TTAH adsorption film-forming mechanism proposed in this work explains a number of observations for TTAH- and BTAH-Cu systems reported in the literature, both in oily and aqueous media. The protection of the Cu surface against sulfide attack is attributed to the formation of a physical barrier by TTAH-Cu complex rather than blocking of active sites on the surface. Hence, future research should be focused on finding CI capable of forming better packed Cu-complex structures.
Download or read book Beyond Copper Soaps written by Luciana da Costa Carvalho and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reports a series of electrochemical experiments where copper was corroded in the presence of various organic substances. Combining data from spectroscopy techniques, X-ray diffraction and mass spectrometry (including proteomics) the experiments demonstrate that copper-organic complexes can be formed during the corrosion of copper. The low solubility of copper-organic complexes in organic solvents and their amorphous nature mean that these compounds cannot be easily detected by one single analytical technique. This book benefits researchers investigating the presence of organic residues in archaeological copper corrosion and copper-organic complexes in art, where sampling is often subject to curatorial constraints. .
Download or read book The Corrosion of Copper Tin and Their Alloys written by Henry Leidheiser (Jr.) and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Plastics for Corrosion Inhibition written by V.A. Goldade and published by Springer Science & Business Media. This book was released on 2006-03-30 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the key problems of failure-free operation of machinery is prevention of corrosion. The global scale of modern production makes this problem even more critical. At the beginning of the 21st century industrial contami- tion and the corrosion-active nature of the environment reached a level such that corrosive damage of materials became commensurate with their prod- tion volume and expenditure on anticorrosion protection of machines became comparable with investments in basic production. Anticorrosion techniques changed from being an auxiliary service to industrial enterprises into a dev- oping, scienti?cally intensive and generously ?nanced branch of production. Polymers occupy a very speci?c place amongst anticorrosion techniques. Polymers combine good chemical resistance with impermeability to di?- ent media and unusual deformation characteristics. The main principle of their application as anticorrosion means is the creation of a tight barrier that insulates metal machine parts or constructions from corrosion agents. The advantages of polymers allow the creation of such a barrier at minimal cost,providingprotectionoftheworkingmachinesfromcorrosion,combining their manufacture with preservation and decreasing the cost of anticorrosion. This is one of the main reasons why world production of polymer materials increased by almost 50% in the past decade.
