Investigation on corrosion of zinc ribbon under alternating current

Lu, Meng; Tang, Dezhi; Du, Yanxia; Zhang, Lei

doi:10.1179/1743278215y.0000000010

Cited by 4 publications

(3 citation statements)

References 34 publications

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“…Here, the E corr is associated with the stability of the samples and the I corr is important to evaluate the kinetic of corrosion reactions (Wei et al , 2016; Sun et al , 2017; Luo and Hu, 2020). The E corr and I corr have been calculated based on the Tafel extrapolation (Lu et al , 2015), as listed in Table 1.…”

Section: Resultsmentioning

confidence: 99%

Analysis on corrosion of aluminum-based micro-arc oxidation coating

Yao

Feng

et al. 2021

ACMM

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Purpose Aluminum alloy is susceptible to chloride ion attack in sea water, resulting in pitting damage and hence serious security risks for the related applications. To improve the corrosion resistance of Al alloy, micro-arc oxidation (MAO) technology has been developed to produce a protective dense oxide layer on top of Al alloy. However, the mechanism of MAO-induced corrosion resistance is still not fully understood, particularly on local corrosion issue. This paper aims to focus on comprehensively studying the corrosion-resistance mechanism by a series of technologies. Design/methodology/approach The corrosion behavior of samples was studied by open circuit potential (OCP), potentiodynamic polarization (PDP), electrode impedance spectroscopy (EIS) and localized electrode impedance spectroscopy (LEIS) tests in NaCl solution. Findings The MAO-coated Al alloy shows a more positive corrosion potential and a higher corrosion current density compared to the untreated counterpart, indicating a significantly enhanced corrosion-resistance. The study of surface morphology and structure also suggest significantly enhanced corrosion-resistance due to the MAO treatment. Originality/value Based on the results, a new corrosion model was proposed to describe the influence of MAO treatment on the corrosion process and corrosion mechanism of Al alloy, providing insights on the design of the corrosion-resistance coating for metallic alloys in marine applications.

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Section: Resultsmentioning

confidence: 99%

Analysis on corrosion of aluminum-based micro-arc oxidation coating

Yao

Feng

et al. 2021

ACMM

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“…In recent years, some studies have been conducted on the service performance of Al alloy and Zn alloy under AC interference. Tang [15,16] studied the AC corrosion of zinc ribbon in 4 g L −1 Na 2 SO 4 solution, and concluded that AC would change the double charge layer of zinc/solution interface and accelerate the corrosion of zinc. Hu [17] found that the existence of AC electric field in an artificial atmospheric environment could alter the morphology of localised corrosion type of Al-alloys, from pitting corrosion with a large number of pits to serious exfoliation corrosion.…”

Section: Introductionmentioning

confidence: 99%

AC Corrosion behaviour of aluminium and zinc sacrificial anodes in seawater

Tian

Long

et al. 2021

Corrosion Engineering, Science and Technology

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In this work, the corrosion behaviour of aluminium (Al) and zinc (Zn) sacrificial anodes under AC interference were studied in 3.5% NaCl solution by AC corrosion simulation experiments, weight loss tests and surface morphology analyses. It was found that AC accelerated the corrosion of Al and Zn, and their corrosion rates increased with the AC current density, besides the localised corrosion of Al was much more obvious than Zn. When the AC current density was 100 A m −2 , the uniform corrosion rates of Al and Zn increased to 14.6 and 0.46 mm/year, respectively, which were 34.8 and 1.48 times of the free-corrosion rates of them. Meanwhile, both the uniform and localised corrosion rates of Al increased much more significant than that of Zn under AC interference.

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“…The final theme contained in the special issue is AC corrosion of pipelines, where two papers are included. Cui et al 19 investigated the effect of AC voltage on passivity of steel developed in concentrated carbonate/bicarbonate solutions, while the work of Lu et al 20 touches the mitigation of AC corrosion of pipelines. Their results are interesting in that the zinc ribbons used for AC corrosion prevention experience accelerated corrosion by AC, especially when the DC (direct current) decoupler is not applied.…”

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confidence: 99%

Pipeline corrosion

Cheng¹

2015

Corrosion Engineering, Science and Technology

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Corrosion, including corrosion assisted cracking, has been identified as the primary mechanism resulting in failures of oil/gas pipelines. 1,2 Pipeline corrosion is a quite complex phenomenon, and the complexity arises as a result of the interaction of multiple reactions and processes occurring simultaneously, which in turn, are very specific to both the material and the environmental interaction. Particularly, the environments where the pipelines are encountered range from highly corrosive ones in upstream oil/gas gathering lines, where high contents of gases such as CO 2 and H 2 S are dissolved in multi-phased flow fluids, to mildly corrosive ones at the soil side, where coating properties and performance, cathodic protection (CP), soil properties, microbial activity, etc., affect the corrosivity of the environment. While significant efforts and advances have been made in pipeline corrosion research, there are increasing uncertainties and ignorance to the emerging corrosion phenomena. In recent years, some broadly reported pipeline incidents resulted from corrosion. 3,4 Indeed, corrosion has been a vital issue affecting the pipeline safety, energy transportation, environmental conservation, and even the national policymaking, as seen in the widely watched Keystone XL and Northern Gateway pipeline projects in North America. 5,6 This special issue of Corrosion Engineering, Science and Technology features papers on the topic of pipeline corrosion. The specific focus is to establish a forum for the dissemination and discussion of recent research advances in the pipeline corrosion area with wide-range themes, including internal corrosion, external corrosion, stress corrosion cracking (SCC), coatings and CP, inspection techniques, corrosion modeling, and AC (alternating current) corrosion. The papers included in this issue are from reputed research groups in Australia, Canada, China, Italy and the USA, respectively.The issue starts with a paper by Eckert, 7 who reviewed the nature, affecting factors, monitoring and management of internal microbiologically influenced corrosion (MIC), one of the least understood corrosion phenomena in oil/gas pipeline systems. Eckert analysed the current method on enumeration of planktonic for MIC investigation, and concluded that the method is neither representative of sessile microorganisms in biofilms nor indicative of the potential for internal MIC in oil and gas systems. Increased emphasis on understanding the interaction between biofilm and metal is suggested in order to improve current MIC management capabilities for oil and gas assets. It is anticipated that the paper provides essential guides for pipeline MIC research and management. Continuing the theme of internal corrosion, Huang et al. 8 have looked to corrosion of pipeline steel in H 2 S/CO 2 containing environments. Undoubtedly, this is also a difficult research topic, especially at a testing pressure up to 10 MPa with the co-existence of H 2 S and CO 2 in the system. They characterised the competitive formation of carbo...

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Investigation on corrosion of zinc ribbon under alternating current

Cited by 4 publications

References 34 publications

Analysis on corrosion of aluminum-based micro-arc oxidation coating

Analysis on corrosion of aluminum-based micro-arc oxidation coating

AC Corrosion behaviour of aluminium and zinc sacrificial anodes in seawater

Pipeline corrosion

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