X-Ray Photoelectron Spectroscopy Study of the Effect of Nitrogen Dioxide and Sulfur Dioxide on the Atmospheric Corrosion of Copper at Low Relative Humidity Values

Feliú, S.; Mariaca, L.; Simancas, J.; González, José Antonio Varela; Morcillo, M.

doi:10.5006/1.3278198

Cited by 11 publications

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“…where E is the cell potential (V), n is the number of electrons involved in the reaction and F is the Faraday constant (9?649610 4 C mol 21 ).…”

Section: Thermodynamic Theory Of Copper Corrosion and Passivationmentioning

confidence: 99%

“…The inhibitive effect of the mixture of NO 2 and SO 2 is a peculiar behaviour that suggests a possible relationship with chemical passivation. 13,[20][21][22][23][24] As is known, this phenomenon is possible when a sufficiently positive potential is established on the cathodic areas to draw the potential (in positive direction) from the anodic areas on the same metallic surface until passivation conditions are reached. For this it is necessary, in turn, to reach a critical anodic current density.…”

Section: Atmospheric Corrosionmentioning

confidence: 99%

“…The comparison of experimental adsorption data (h exp and c exp ) and data predicted by a theoretical adsorption equation (h cal and c cal ) is frequently the criterion used to assess the validity of a theoretical expression to describe the adsorption equilibrium, where h is the degree of coverage of the copper surface by adsorbed BTA inhibitor; and c is the concentration of the BTA inhibitor. The h value is obtained using the expression h~C R abs {CR pre CR abs (21) where CR abs and CR pre are the copper corrosion rates in the absence and presence of BTA respectively. It should be noted that the inhibition efficiency (IE), as a %, is related with h by the expression: IE5h6100.…”

Section: Benzotriazole (Bta) and Its Derivativesmentioning

confidence: 99%

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Copper deterioration: causes, diagnosis and risk minimisation

Bastidas¹,

Criado²,

Fajardo³

et al. 2010

International Materials Reviews

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Copper is widely used in many applications such as heat exchangers, condensers, heating and air conditioning systems, electricity, electronic circuitry and ornamental parts. This paper reviews the issue of copper corrosion in different environments and applications. Special attention is paid to the influence of relative humidity and low molecular weight carboxylic acids. These acids are present in rain, snow, clouds and particulate matter and contribute about 15-35% of rain acidity. Attention is also paid to copper corrosion originated by formic, acetic, propionic and butyric acid vapours. Corrosion product layers (patina) are analysed, showing the relationship between potential and current density cathodic peaks, and models are proposed that show a proportionality factor of the dimensions of a resistor. These results are of practical importance in copper roofing applications. Before 1985, copper was almost universally considered to be a corrosion resistant conduit of potable water, and few instances of copper tube failure were reported. Where unacceptable performance was identified, the problem was usually attributed to reticulation and plumbing systems. In air conditioning applications, premature failure of copper tubing frequently occurs due to pitting corrosion after a short time in service or even during postinstallation leakage tests. This type of corrosion is described in the literature as formicary corrosion, and its morphology is characterised by microscopic caverns connected by tunnels. Specimens are analysed to assess the reasons for such premature corrosion failure. Finally, procedures to mitigate copper corrosion are addressed. Pickling in dilute mineral acids (H 2 SO 4 and HCl) is discussed as the most common method for removing oxides formed on the surface of copper based materials during mill processing and manufacturing operations. The use of corrosion inhibitors, such as immersion corrosion inhibitors and volatile corrosion inhibitors (VCI), is a widespread practice to reduce copper corrosion, achieving significant delays in the corrosion process. Reference is made to the search for new environmentally friendly inhibitors for copper and bronze using organic compounds in acid, neutral and alkaline media, and a number of ecological alternatives are reviewed.

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“…where E is the cell potential (V), n is the number of electrons involved in the reaction and F is the Faraday constant (9?649610 4 C mol 21 ).…”

Section: Thermodynamic Theory Of Copper Corrosion and Passivationmentioning

confidence: 99%

Section: Atmospheric Corrosionmentioning

confidence: 99%

Section: Benzotriazole (Bta) and Its Derivativesmentioning

confidence: 99%

See 1 more Smart Citation

Copper deterioration: causes, diagnosis and risk minimisation

Bastidas¹,

Criado²,

Fajardo³

et al. 2010

International Materials Reviews

View full text Add to dashboard Cite

show abstract

“…One study has demonstrated that SO 2 combines in a lattice plane in a type of sulfur compound. The formation of Ag 2 SO 3 , Ag 2 SO 4 , and Cu 4 SO 4 (OH) 6 is attributed to the adsorption of SO 2 [ 22 , 23 , 24 ].…”

Section: Introductionmentioning

confidence: 99%

Corrosion Behavior of Silver-Plated Circuit Boards in a Simulated Marine Environment with Industrial Pollution

et al. 2017

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The electrochemical corrosion behavior of a silver-plated circuit board (PCB-ImAg) in a polluted marine atmosphere environment (Qingdao in China) is studied through a simulated experiment. The morphologies of PCB-ImAg show some micropores on the surface that act as the corrosion-active points in the tests. Cl− mainly induces microporous corrosion, whereas SO2 causes general corrosion. Notably, the silver color changes significantly under SO2 influence. EIS results show that the initial charge transfer resistance in the test containing SO2 and Cl− is 9.847 × 103, while it is 3.701 × 104 in the test containing Cl− only, which demonstrates that corrosion accelerates in a mixed atmosphere. Polarization curves further show that corrosion potential is lower in mixed solutions (between −0.397 V SCE and −0.214 V SCE) than it in the solution containing Cl− only (−0.168 V SCE), indicating that corrosion tendency increases with increased HSO3− concentration.

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“…Especially in the highly corrosive environments that are rich in chlorine ions, they are vulnerable to serious corrosion (Ren et al , 2014; Wang and Yu, 2000). For example, in an oxygen-rich system of chlorine solution, copper corrosion reactions happen at a rapid rate (Feliu et al , 2005). It is a common problem existing in the electric transmission and transformation equipment that the copper suffers serious corrosion under heavy industrial pollution environments.…”

Section: Introductionmentioning

confidence: 99%

Corrosion of copper exposed to Zhanjiang and Zhuhai atmospheric environments

Wei

Liu

et al. 2017

ACMM

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Purpose The aim of this paper was to study the initial corrosion behavior of copper in the substations of Zhanjiang and Zhuhai. Design/methodology/approach The copper exposed at the substation of Guangdong coastal region in southern China for up to 12 months. The rust layer formed on the copper has been examined by scanning electron microscopy, X-ray energy spectrum, X-ray diffraction and electrochemical polarization techniques. Findings The corrosion weight loss of copper at Zhanjiang exposure site is a little more serious than that at Zhuhai exposure site in every exposure period. The corrosion products of copper have different changes in color and composition at the two exposure sites. The tensile strength of copper has a slight decrease after one-year exposure. Originality/value The atmospheric exposure experiments of copper in the substations of Zhanjiang and Zhuhai have been adopted for the first time. The corrosion behavior of copper was investigated, and it can provide reference for material selection of the substation.

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X-Ray Photoelectron Spectroscopy Study of the Effect of Nitrogen Dioxide and Sulfur Dioxide on the Atmospheric Corrosion of Copper at Low Relative Humidity Values

Cited by 11 publications

References 0 publications

Copper deterioration: causes, diagnosis and risk minimisation

Copper deterioration: causes, diagnosis and risk minimisation

Corrosion Behavior of Silver-Plated Circuit Boards in a Simulated Marine Environment with Industrial Pollution

Corrosion of copper exposed to Zhanjiang and Zhuhai atmospheric environments

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