Stress Corrosion Cracking of a Copper Pipe in a Heating Water Supply System

Chae, Hobyung; Wang, Huai; Hong, Minki; Kim, Woo Cheol; Kim, Jung-Gu; Kim, Heesan; Lee, Soo Yeol

doi:10.1007/s12540-019-00386-0

Cited by 16 publications

(4 citation statements)

References 25 publications

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“…As these electrochemical corrosion reactions proceed, more and more corrosion products consisting of Cu(HCOO) 2 and Cu 2 O are produced, which will form a wedge effect and generate many microcracks. [ 30–32 ] With the expansion of the cracks, more copper matrix is exposed. Cu(HCOO) 2 can react with the freshly exposed copper matrix.…”

Section: Resultsmentioning

confidence: 99%

An investigation on the mechanisms of ant nest corrosion of copper tube in formic acid environment

Liu

et al. 2022

Materials & Corrosion

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Copper tubes used in air-conditioners and refrigerators often fail due to ant nest corrosion (ANC) in formic acid environment. In this paper, corrosion behavior and corrosion mechanisms of copper tubes in formic acid (HCOOH) were analyzed by vapor corrosion tests, optical microscopy (OM), scanning electron microscope (SEM), energy-dispersive X-ray spectrometry (EDS). The effects of the surface condition on ANC of copper tube were also investigated.Results showed that ANC of copper tube was a spontaneous process. The surface integrity of copper tube surface oxide layer is not the decisive factor of ANC. ANC originated from the dissolution of the surface oxide layer in HCOOH, which exposed fresh copper matrix. ANC is a special electrochemical corrosion, where the copper matrix acts as an anode and the undissolved surface oxide layer acts as a cathode due to the potential difference. The accumulation of corrosion products consisting of Cu(HCOO) 2 and Cu 2 O can produce a wedge effect and generate many microcracks until to penetrate the copper tube wall. These findings would provide a deep understanding of the corrosion behavior of copper and copper alloys.

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Section: Resultsmentioning

confidence: 99%

An investigation on the mechanisms of ant nest corrosion of copper tube in formic acid environment

Liu

et al. 2022

Materials & Corrosion

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“…In the world, stress corrosion was first encountered more than a hundred years ago during the construction and operation of large-capacity ships. At that time, the cause was associated with exposure to seawater [8].…”

Section: Methodsmentioning

confidence: 99%

Corrosion cracking under main pipelines stress

Хасанова

2022

J. Phys.: Conf. Ser.

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Stress corrosion cracking (SCC) or stress corrosion is one of the most dangerous types of damage in chemical, oil and gas industry, as well as in processing, nuclear, heat and power, metallurgical, shipbuilding and other industries. Corrosion cracking of pipelines under stress (stress corrosion) is the main source of emergency incidents (emergencies) mainly in gas main pipelines. This type of corrosion is widely known and very dangerous.

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“…However, the air conditioning systems usually failed in the process of service because of the corrosion of copper tubes in recent years. [8][9][10][11] On the one hand, the copper tube wall becomes thinner and thinner with the decrease of production costs. Accordingly, the service life of copper tubes is reduced in the same environment.…”

Section: Introductionmentioning

confidence: 99%

A laboratory study of the failure analysis of copper tube used in the air conditioning heat exchanger

Wang,

Li,

Cheng

et al. 2024

Materials & Corrosion

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The failure behavior and the failure mechanisms of the copper tube used in the air conditioning heat exchanger were analyzed using macrostructure and microstructure examination and the chemical composition analysis of the corrosion products. Results showed that the corrosion of the exterior surface of the copper tube should be responsible for the failure of the air conditioning heat exchanger. The chemical compositions of the corrosion products mainly included Cu, O, C, P, S, Cl, and so forth. The corrosion mechanisms were electrochemical corrosion under the circumstances of a humid environment, oxygen, and some corrosive medium. The corrosive media were organic carboxylic acids, Cl−, H2S, and SO2, which came from air pollutants, the combustion of fuels, the automobile exhaust, and the industrial waste gas. One or more electrochemical corrosion destroyed the integrity of the copper tube and led to the failure of the air conditioning heat exchanger in advance.

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Stress Corrosion Cracking of a Copper Pipe in a Heating Water Supply System

Cited by 16 publications

References 25 publications

An investigation on the mechanisms of ant nest corrosion of copper tube in formic acid environment

An investigation on the mechanisms of ant nest corrosion of copper tube in formic acid environment

Corrosion cracking under main pipelines stress

A laboratory study of the failure analysis of copper tube used in the air conditioning heat exchanger

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