The galvanic corrosion of welded ultra-high strength steels used for automotive applications

Wint, Natalie; Leung, Jackie; Sullivan, James; Penney, David; Gao, Yi

doi:10.1016/j.corsci.2018.03.025

Cited by 35 publications

(10 citation statements)

References 25 publications

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“…As the most corroded zone, FZ determined the corrosion resistance of the welded joint [ 27 , 28 ]. In order to further explore the influence of laser welding speed on corrosion, a micro-area SKP test was performed on the laser welding joint to characterize the corrosion resistance of each zone.…”

Section: Resultsmentioning

confidence: 99%

“…Moreover, as the weakest part of TWIP steel components, the welded joint determines the lifetime of TWIP steel components in harsh working environments [ 25 , 26 ]. Due to the unevenness of the structure, the welded joint is sensitive to corrosion, especially galvanic corrosion [ 27 , 28 ]. However, the corrosion behavior of TWIP steel laser-welded joints has rarely been investigated, as no relevant reference has been found.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Laser-Welding on Microstructure and Corrosion Properties of Twinning-Induced Plasticity (TWIP) Steel

Zhang

Liu

et al. 2020

Materials

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The effect of welding speed on microstructure, mechanical properties, and corrosion properties of laser-assisted welded joints of a twinning-induced plasticity (TWIP) steel was investigated by using X-ray diffraction (XRD), scanning electron microscopy (SEM), electron backscattered diffraction (EBSD) analysis, electrochemical test, and micro-area scanning Kelvin probe test (SKP). The results reveal that the welded joints, with a fully austenitic structure, are obtained by laser welding. In addition, the preferred orientation of grains in fusion zone (FZ) increased with the increase of welding speed. Additionally, the coincidence site lattice (CSL) grain boundaries of FZ decreased with increasing welding speed. However, potentiodynamic polarization and SKP results demonstrated that the welding speed of 1.5 m/min renders superior corrosion resistance. It can also be inferred that the corrosion properties of the welded joints are related to the grain size and frequency of CSL grain boundary in FZ.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of Laser-Welding on Microstructure and Corrosion Properties of Twinning-Induced Plasticity (TWIP) Steel

Zhang

Liu

et al. 2020

Materials

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“…The results showed that the preferential site of attack in the HSLA-HSLA couple was the WM zone. [10] The HSLA used in the present work is a marine steel for marine engineering. When a welded structure of HSLA steels is exposed to a marine environment, corrosion becomes a major problem.…”

Section: Introductionmentioning

confidence: 99%

Corrosion behavior of the high‐strength low alloy steel welded joint in natural seawater

Liu

Sui

Zhang

et al. 2022

Materials & Corrosion

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In this work, the corrosion behavior of high-strength low alloy (HSLA) steel welded joints in natural seawater solution was investigated by electrochemical and immersion tests. The experimental results prove that the corrosion resistance of the weld metal (WM) was higher than that of the base metal (BM). The scanning Kelvin probe results show that the potential distribution of the BM zone is lower than the heat-affected zone (HAZ) and WM zone. The scanning vibrating electrode technique results demonstrate that the initial attack for the HSLA welded joint majorly took place in the BM zone after immersion in natural seawater. The corrosion morphology of the HSLA welded joint after immersion was observed by scanning electron microscope. The corrosion morphology of BM and HAZ regions tends to be uniform corrosion, whereas it is mainly pitting corrosion for the WM zone.

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“…However, only a very limited number is dedicated to understand the local corrosion behaviour of steels used in automotive applications [20].…”

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confidence: 99%

Global and Local Corrosion of Welded Joints of High-Strength Low-Alloy Automotive Steel

et al. 2021

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Global and local corrosion techniques were used to study the corrosion behaviour of weld joints of a high strength low alloy steel (LNE500), typically employed in the automotive industry, in Brazil. The welded joints were prepared by gas metal arc welding (GMAW). Two welding transfer modes were used in order to obtain different heat inputs (HI): pulsed (PUL) and cold metal transfer (CMT). Local and global corrosion analysis techniques presented complementary information. While the local in-situ analysis (scanning vibrating electrode technique) revealed the weld metal (WM) as the region where corrosion started, conventional electrochemical techniques (Potentiodynamic polarization (PP) and electrochemical impedance spectroscopy (EIS)) revealed a higher corrosion rate in the coarse-grained heat affected zone (CGHAZ), which was preferentially corroded. A superior corrosion resistance of the weld metal obtained using CMT over the PUL transfer mode was revealed by EIS and PP. In addition, the results from CMT and PUL samples show that austenite grain size affects the propagation of the corrosion process. The results are discussed based on microstructural and compositional aspects of the different regions that characterize the welded joints.

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The galvanic corrosion of welded ultra-high strength steels used for automotive applications

Cited by 35 publications

References 25 publications

Influence of Laser-Welding on Microstructure and Corrosion Properties of Twinning-Induced Plasticity (TWIP) Steel

Influence of Laser-Welding on Microstructure and Corrosion Properties of Twinning-Induced Plasticity (TWIP) Steel

Corrosion behavior of the high‐strength low alloy steel welded joint in natural seawater

Global and Local Corrosion of Welded Joints of High-Strength Low-Alloy Automotive Steel

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