Influence of Impurities in Cathodic Copper on the Ductility of Copper Wires

Camurri, C.; Carrasco, Claudia; Leite, Rodrigo Reis; Mangalaraja, R.V.; Dille, Jean

doi:10.1007/s11665-011-0036-8

Cited by 7 publications

(2 citation statements)

References 10 publications

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“…Copper tubes are widely used in the evaporators and the condensers of air conditioning and refrigeration systems because of their excellent ductility and thermal conductivity. [ 1–4 ] In the process of service, copper tubes are often corroded by organic carboxylic acids, such as HCOOH, CH 3 COOH, CH 2 CH 3 COOH, and CH 2 CH 2 CH 3 COOH. [ 5 ] These carboxylic acids come from the oxidation and decomposition of certain organic pollutants in the environment, such as aldehydes, alkenes, and esters.…”

Section: Introductionmentioning

confidence: 99%

Comparison of the corrosion behavior of copper tubes in formic acid and acetic acid environment

Liu

Zhao

et al. 2021

Materials & Corrosion

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Carboxylic acids with different carbon chains have different corrosion behaviors on copper tubes. In this paper, corrosion behavior and corrosion mechanisms of copper tubes in formic acid (HCOOH) and acetic acid (CH 3 COOH) were analyzed by vapor corrosion tests, electrochemical tests, contact angle examination, optical microscopy, Fourier transform infrared spectroscopy, and X-ray diffraction. The corrosion process of copper tubes in the HCOOH environment is more complex than in the CH 3 COOH environment and HCOOH is easy to cause "ant nest" corrosion on copper tubes. The corrosion rate is faster and the surface of the copper tube is more easily corroded in the CH 3 COOH environment due to the formation of unstable and loose corrosion products, Cu(OH)(CH 3 COO) 2 •2H 2 O. The results of the contact angle examination showed that the contact angles of HCOOH and CH 3 COOH on copper tube surface were 25°and 9°, respectively, which means that CH 3 COOH is more likely to be absorbed by the surface of the copper tube evenly. Differences in the wettability of these two carboxylic acids with copper tubes are the main reason for the different corrosion phenomena. The corrosion mechanisms of copper tubes in carboxylic acid are also discussed.

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Section: Introductionmentioning

confidence: 99%

Comparison of the corrosion behavior of copper tubes in formic acid and acetic acid environment

Liu

Zhao

et al. 2021

Materials & Corrosion

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“…However, oxygen presence in the copper structure has a numerous beneficial functions. A carefully controlled amount of oxygen throughout the manufacturing process of copper reduces the negative impact of impurities as it is involved in the formation of oxides or conglomerates of oxides of other less noble than copper elements, and therefore reducing their negative impact on material properties such as ductility and annealing by removing them from the solid solution into the form of precipitates [28,29]. The abovementioned matters have been included, among others, in the current paper, which analyses the samples of ETP grade copper taken parallelly and perpendicularly to the dendritic boundaries and the location of Cu 2 O oxide at the fracture surface.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Dendritic Structure Influence on the Electrical and Mechanical Properties Diversification of the Continuously Casted Copper Strand

et al. 2020

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The properties of copper in its solid state are strongly affected by the crystallization conditions of the liquid material. ETP grade copper (Electrolytic Tough Pitch Copper) contains oxygen, which causes Cu2O oxide to crystallize in the interdendritic spaces during solidification process which due to the shape of continuous casting mould and the feed of liquid copper during the crystallization process in strand casting might cause a high risk of macrosegregation of oxygen in the copper structure. In the current paper the implied interactions of the dendritic structure of the copper strand in terms of homogeneity at the cross-section of its electrical, mechanical and plastic properties determined based on the samples taken parallelly and perpendicularly to the surface of the dendritic boundaries were analysed. The obtained results were confronted with scanning electron microscopy (SEM) images of the fractures formed during uniaxial tensile test. It has been observed that when the crystallites were arranged perpendicularly to the tensile direction the yield strength (YS) was lower and the fractures were brittle. On the other hand, when the crystallites were arranged parallelly to the tensile direction the fractures were plastic and elongated necking was observed along with the higher YS and total elongation values. The differences in values vary in terms of the applied direction of the tensile force. A characteristic positioning of the Cu2O oxide particles inside the fracture depending on the crystallite alignment and the direction of the applied tensile force has been observed.

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Description of the Liquidus Surface and Characterization of Alloys of the Ternary Bi-Cu-In System

Minić¹,

Premović²,

Kolarević

et al. 2013

J. of Materi Eng and Perform

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Influence of Impurities in Cathodic Copper on the Ductility of Copper Wires

Cited by 7 publications

References 10 publications

Comparison of the corrosion behavior of copper tubes in formic acid and acetic acid environment

Comparison of the corrosion behavior of copper tubes in formic acid and acetic acid environment

Investigation of the Dendritic Structure Influence on the Electrical and Mechanical Properties Diversification of the Continuously Casted Copper Strand

Description of the Liquidus Surface and Characterization of Alloys of the Ternary Bi-Cu-In System

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