LEIS study of the protection of zinc phosphate/epoxy coatings under cathodic protection

Liu, Xiaoling; Shao, Yawei; Liu, Mingshun; Chen, Shougang; Wang, Fuhui; Wang, Longqiang

doi:10.1039/c6ra06377b

Cited by 5 publications

(3 citation statements)

References 31 publications

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“…11 They also have interesting properties for corrosion prevention. [12][13][14] Both features are assets for use in the elds of biomedicine and water treatment.…”

Section: Introductionmentioning

confidence: 99%

Bio-sourced phosphoprotein-based synthesis of silver-doped macroporous zinc phosphates and their antibacterial properties

et al. 2018

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“…11 They also have interesting properties for corrosion prevention. [12][13][14] Both features are assets for use in the elds of biomedicine and water treatment.…”

Section: Introductionmentioning

confidence: 99%

Bio-sourced phosphoprotein-based synthesis of silver-doped macroporous zinc phosphates and their antibacterial properties

et al. 2018

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“…However, it has an outstanding advantage that many electrochemical techniques can be used during immersion to generation more detailed information of coating degradation process. Electrochemical impedance spectroscopy (EIS) is the most popular method used during immersion test, which can reliably monitor the degradation of an organic coating system [152][153][154][155] due to its high sensitivity and reliability for a high-impedance system. Due to the ingress of aggressive species or electrolyte, coating resistance decreases and coating capacitance increases [156,157].…”

Section: Immersion and Eismentioning

confidence: 99%

Modification, Degradation and Evaluation of a Few Organic Coatings for Some Marine Applications

Song

Feng

2020

CMD

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Organic coatings for marine applications must have great corrosion protection and antifouling performance. This review presents an overview of recent investigations into coating microstructure, corrosion protection performance, antifouling behavior, and evaluation methods, particularly the substrate effect and environmental influence on coating protectiveness, aiming to improve operational practice in the coating industry. The review indicates that the presence of defects in an organic coating is the root cause of the corrosion damage of the coating. The protection performance of a coating system can be enhanced by proper treatment of the substrate and physical modification of the coating. Environmental factors may synergistically accelerate the coating degradation. The long-term protection performance of a coating system is extremely difficult to predict without coating defect information. Non-fouling coating and self-repairing coatings may be promising antifouling approaches. Based on the review, some important research topics are suggested, such as the exploration of rapid evaluation methods, the development of long-term cost-effective antifouling coatings in real marine environments.

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“…Therefore, in this study, to quantitatively characterize the corrosion history, we adopted a variety of corrosion measurement techniques, including the localized electrode impedance spectroscopy (LEIS) (Mouanga et al , 2013; Liu and Liu, 2016; Wang et al , 2020) and the global electrochemical properties. Based on the local and global characterizations, a new corrosion model of MAO-coated AAs is proposed, providing insights for how to improve the corrosion resistance of metallic alloys.…”

Section: Introductionmentioning

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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LEIS study of the protection of zinc phosphate/epoxy coatings under cathodic protection

Abstract: The anti-corrosion properties of the defective zinc phosphate/epoxy coatings under cathodic protection (CP) in a 3.5% NaCl solution were evaluated by localized electrochemical impedance spectroscopy (LEIS) and scanning electrochemical microscopy.

Cited by 5 publications

References 31 publications

Bio-sourced phosphoprotein-based synthesis of silver-doped macroporous zinc phosphates and their antibacterial properties

Bio-sourced phosphoprotein-based synthesis of silver-doped macroporous zinc phosphates and their antibacterial properties

Modification, Degradation and Evaluation of a Few Organic Coatings for Some Marine Applications

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

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