A review of physical properties of hot-dip galvanized coating layer by layer and their respective electrochemical corrosion behavior

IF 2.3 4区 材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING Anti-corrosion Methods and Materials Pub Date : 2024-06-27 DOI:10.1108/acmm-02-2024-2963
Zhiwei Li, Dingding Li, Yulong Zhou, Haoping Peng, Aijun Xie, Jianhua Wang
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Abstract

Purpose

This paper aims to contribute to the performance improvement and the broader application of hot-dip galvanized coating.

Design/methodology/approach

First, the ability to provide barrier protection, galvanic protection, and corrosion product protection provided by hot-dip galvanized coating is introduced. Then, according to the varying Fe content, the growth process of each sublayer within the hot-dip galvanized coating, as well as their respective microstructures and physical properties, is presented. Finally, the electrochemical corrosion behaviors of the different sublayers are analyzed.

Findings

The hot-dip galvanized coating is composed of η-Zn sublayer, ζ-FeZn13 sublayer, δ-FeZn10 sublayer, and Γ-Fe3Zn10 sublayer. Among these sublayers, with the increase in Fe content, the corrosion potential moves in a noble direction.

Research limitations/implications

There is a lack of research on the corrosion behavior of each sublayer of hot-dip galvanized coating in different electrolytes.

Practical implications

It provides theoretical guidance for the microstructure control and performance improvement of hot-dip galvanized coatings.

Originality/value

The formation mechanism, coating properties, and corrosion behavior of different sublayers in hot-dip galvanized coating are expounded, which offers novel insights and directions for future research.

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逐层热浸镀锌层的物理性质及其各自的电化学腐蚀行为综述
设计/方法/途径首先,介绍了热镀锌涂层的阻隔保护、电镀保护和腐蚀产物保护能力。然后,根据不同的铁含量,介绍了热镀锌涂层内各亚层的生长过程及其各自的微观结构和物理性能。研究结果热浸镀锌层由η-Zn 亚层、ζ-FeZn13 亚层、δ-FeZn10 亚层和Γ-Fe3Zn10 亚层组成。研究局限性/意义缺乏对热镀锌镀层各亚层在不同电解质中腐蚀行为的研究。原创性/价值阐述了热镀锌镀层中不同亚层的形成机理、镀层性能和腐蚀行为,为今后的研究提供了新的见解和方向。
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来源期刊
Anti-corrosion Methods and Materials
Anti-corrosion Methods and Materials 工程技术-冶金工程
CiteScore
2.80
自引率
16.70%
发文量
61
审稿时长
13.5 months
期刊介绍: Anti-Corrosion Methods and Materials publishes a broad coverage of the materials and techniques employed in corrosion prevention. Coverage is essentially of a practical nature and designed to be of material benefit to those working in the field. Proven applications are covered together with company news and new product information. Anti-Corrosion Methods and Materials now also includes research articles that reflect the most interesting and strategically important research and development activities from around the world. Every year, industry pays a massive and rising cost for its corrosion problems. Research and development into new materials, processes and initiatives to combat this loss is increasing, and new findings are constantly coming to light which can help to beat corrosion problems throughout industry. This journal uniquely focuses on these exciting developments to make essential reading for anyone aiming to regain profits lost through corrosion difficulties. • New methods, materials and software • New developments in research and industry • Stainless steels • Protection of structural steelwork • Industry update, conference news, dates and events • Environmental issues • Health & safety, including EC regulations • Corrosion monitoring and plant health assessment • The latest equipment and processes • Corrosion cost and corrosion risk management.
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