Performance comparison of Zn, Zn-Al and Zn-Al-Mg coatings on the corrosion resistance of galvanized steel joints bonded using a hot-curing epoxy adhesive

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-02-26 DOI:10.1016/j.tws.2025.113128

Fengzhen Sun , Ruitong Shi , Shuangshuang Li , Yanliang Zhao , Junying Min

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引用次数: 0

Abstract

The composition of galvanized coating has significant effects on the surface morphology and corrosion behavior of galvanized steel, which in turn influences the mechanical property and the corrosion resistance of adhesive-steel interface. In this study, the influences of three galvanized coatings, i.e., the Zn, Zn-Al and Zn-Al-Mg coatings, on the degradation of galvanized steel joints bonded using Henkel EP 5089 adhesive under typical corrosive environments were investigated. Surface morphology, coating thickness and chemical composition after corrosion was analyzed to explore the corrosion behavior of different adhesive-steel interfaces. The results showed that the bonding interface of adhesive joint coated with Zn-Al-Mg exhibited higher corrosion resistance under three typical exposure environments. It also suggested that the adhesive joints of Zn, Zn-Al and Zn-Al-Mg coated steel failed very differently under aggressive corrosive environment. The adhesive joints made of Zn and Zn-Al coated steel tended to fail in the form of coating detachment due to the severe corrosion in the coatings, whilst the joints coated with Zn-Al-Mg failed at the adhesive-steel interface where localized corrosion occurred.

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来源期刊

Thin-Walled Structures 工程技术-工程：土木

CiteScore

9.60

自引率

20.30%

发文量

801

审稿时长

66 days

期刊介绍： Thin-walled structures comprises an important and growing proportion of engineering construction with areas of application becoming increasingly diverse, ranging from aircraft, bridges, ships and oil rigs to storage vessels, industrial buildings and warehouses. Many factors, including cost and weight economy, new materials and processes and the growth of powerful methods of analysis have contributed to this growth, and led to the need for a journal which concentrates specifically on structures in which problems arise due to the thinness of the walls. This field includes cold– formed sections, plate and shell structures, reinforced plastics structures and aluminium structures, and is of importance in many branches of engineering. The primary criterion for consideration of papers in Thin–Walled Structures is that they must be concerned with thin–walled structures or the basic problems inherent in thin–walled structures. Provided this criterion is satisfied no restriction is placed on the type of construction, material or field of application. Papers on theory, experiment, design, etc., are published and it is expected that many papers will contain aspects of all three.