Corrosion behavior and failure mechanism of electromagnetic pulse welded joints between galvanized steel and aluminum alloy sheets

Wang, Shaoluo; Luo, Kun; Sun, Tao; Li, Guangyao; Cui, Junjia

doi:10.1016/j.jmapro.2021.02.039

Cited by 30 publications

(7 citation statements)

References 54 publications

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“…The calculated values are listed in table 2. The sequence of E corr at different zones is determined as IMC > steel HAZ > base metal of DP780 > base metal of 5182 > weld nugget of aluminium > galvanized coating of DP780, indicating that the smallest and greatest thermodynamic trend of corrosion at IMC and galvanized coating of DP780 in the RSW joint, respectively [9]. Moreover, the corrosion potential sequence from the polarization curves is accordance with the OCP sequence, indicating the possibility of galvanic corrosion between those different zones.…”

Section: Polarization Measurementsmentioning

confidence: 69%

“…They demonstrated that Zn coatings are more susceptible to galvanic corrosion than aluminium alloy and bare steel [7]. The effect of the galvanized coating layer on enhancing corrosion resistance of aluminium/steel joints were also reported by Lim et al [8] and Wang et al [9]. Joo et al [10] showed that the reduction of residual nugget diameter after corrosion is responsible for the reduction in shear strength of AA6061-T6 aluminium alloy/galvanized steel RSW joints.…”

Section: Introductionmentioning

confidence: 78%

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Effect of intermetallic compound on the corrosion behaviour of resistance spot welding joints between 5182 aluminium alloy and galvanized DP780 dual-phase steel

Zhang

Meng

et al. 2023

Mater. Res. Express

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Interfacial intermetallic compound (IMC) layer is critical during realizing the galvanic corrosion mechanism and strength degradation of aluminium/steel resistance spot welding (RSW) joints. The effect of IMC layer on the corrosion behaviour of RSW joint between 5182 aluminium alloy and galvanized DP780 dual-phase steel was investigated by immersion corrosion method and electrochemical method. Results demonstrated localized corrosion around Fe-rich phase particles on aluminium nugget and preferential corrosion at the interface front near IMC layer. The IMC layer had the highest open circuit potential value of -0.569 V and low corrosion current density among the investigated nugget and substrates. The potential difference (0.184 V) between the cathodic IMC layer and large area of anodic aluminium nugget was responsible for the preferential initiation of localized corrosion at the interface front near the IMC layer.

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Section: Polarization Measurementsmentioning

confidence: 69%

Section: Introductionmentioning

confidence: 78%

Effect of intermetallic compound on the corrosion behaviour of resistance spot welding joints between 5182 aluminium alloy and galvanized DP780 dual-phase steel

Zhang

Meng

et al. 2023

Mater. Res. Express

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“…The relatively small Ecorr indicates that the joint in the natural state is more prone to corrosion. The self-corrosion potential, Ecorr, only reflects the corrosion trend, and there is no certain relationship with the corrosion rate [35].…”

Section: Dynamic Potential Polarizationmentioning

confidence: 99%

Effect of Al-Si Coating on the Interfacial Microstructure and Corrosion Resistance of Dissimilar Laser Al Alloy/22MnB5 Steel Joints

Wu,

Oliveira,

Yang

et al. 2024

Metals

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This investigation employed different laser powers to conduct the laser welding–brazing process of 5052 aluminum alloy to both Al-Si coated and uncoated 22MnB5 steel. The flux-cored Zn-Al22 filler metal was employed during the procedure. The influence of Al-Si coatings on the microstructure and corrosion resistance of Al/Steel welded joints was investigated using microstructural characterization and electrochemical tests. It was noted that the interfacial microstructure of the laser Al/steel joints was significantly altered by the Al-Si coating. Moreover, the Al-Si coating suppressed the formation and growth of the interfacial reaction layer. Electrochemical corrosion tests showed that the impact of Al-Si coating on the corrosion resistance of laser joints depended on the laser powers and thickness of the interfacial intermetallic compound (IMC) layer. The research suggests that galvanic corrosion occurs due to the differences in corrosion potential between fusion zone (FZ), steel, and Fe-Al-Zn IMCs, which accelerate the corrosion of the joint. The IMC layer acts as a cathode to accelerate the corrosion of the FZ and as an anode to protect the steel from corrosion.

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“…[32,33] For dissimilar welded joints, galvanic corrosion is predominantly in the medium. [34][35][36] In corrosive environments, a significant potential difference exists between the FZ, HAZ, and BM. [37,38] The localized corrosion behavior of welded joints is also measured using localized electrochemical methods, allowing the welded joint to be compared with conventional electrochemical techniques.…”

Section: Introductionmentioning

confidence: 99%

Role of Ni Content on Microstructure, Mechanical Property, and In‐Site Local Corrosion Behavior of Welded Joints Produced by Laser Welding of Dual‐Phase Steel

Zhai,

Liu,

et al. 2023

steel research int.

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In this study, the effects of Ni content on the microstructure, microhardness, and in‐site local corrosion behavior of laser‐welded joints in dual‐phase steel were investigated. The experimental results indicated that the microstructure of the fusion zone changed from martensite to austenite as the Ni content increased. The fusion zone (FZ) hardnesses of the 0Ni (no Ni foil addition) and 50Ni (50 μm Ni foil) welded joints were higher than that of the 100Ni (100 μm Ni foil) welded joints because of the austenite in the 100Ni welded joint. The welded joint without Ni showed severe pitting corrosion (more than 15 pitting sites in each zone of the welded joint) at the tested corrosion time. However, when immersed in the corrosion solution, the welded joints with added Ni exhibited slight pitting corrosion (less than 5 pitting sites). The Ni addition inhibited the pitting corrosion of the welded joints of high‐strength dual‐phase steel.This article is protected by copyright. All rights reserved.

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Corrosion behavior and failure mechanism of electromagnetic pulse welded joints between galvanized steel and aluminum alloy sheets

Cited by 30 publications

References 54 publications

Effect of intermetallic compound on the corrosion behaviour of resistance spot welding joints between 5182 aluminium alloy and galvanized DP780 dual-phase steel

Effect of intermetallic compound on the corrosion behaviour of resistance spot welding joints between 5182 aluminium alloy and galvanized DP780 dual-phase steel

Effect of Al-Si Coating on the Interfacial Microstructure and Corrosion Resistance of Dissimilar Laser Al Alloy/22MnB5 Steel Joints

Role of Ni Content on Microstructure, Mechanical Property, and In‐Site Local Corrosion Behavior of Welded Joints Produced by Laser Welding of Dual‐Phase Steel

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