Research on the corrosion resistance of Cu-Al joints brazed with flux-cored Zn-2Al filler metal

Huang, Sen; Long, Weimin; Lu, Quanbin; Jiu, Yongtao; Zhong, Shengwen; Bao, Li; Zhao, Yanxiu

doi:10.1088/2053-1591/ab057c

Cited by 7 publications

(3 citation statements)

References 18 publications

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“…In addition, the presence of cracks was also found in the micrographs. The presence of white powdery corrosion products and cracks proves that the electrochemical corrosion of alloys is dominated by both grain boundary corrosion and selective phase corrosion [22,38,39].…”

Section: Effect Of Al Content On the Rate Of Self-corrosion Of Zn-al ...mentioning

confidence: 99%

“…Combining the microstructure of the extruded-state alloy in Figure 5, it was found that the number of α-Al phases in the alloy increased with the rise of the Al content; this would significantly increase the potential difference between the α-phase and the η-phase and thus increase the driving force of the galvanic coupling corrosion process and make the corrosion more likely to occur [38]. In addition, because Zn-5Al has fewer added Al elements, it is difficult to generate a continuous Al 2 O 3 protective film to inhibit the electrochemical corrosion process, and thus corrosion is also more likely to occur [22].…”

Section: Effect Of Al Content On the Self-corrosion Potential Of Alloysmentioning

confidence: 99%

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Effect of Al Content on the Microstructure and Properties of Zn-Al Solder Alloys

Zhai,

Wang,

Liu

et al. 2024

Metals

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Zn-Al alloy with the addition of Al (5–25 wt.%) was fabricated into as–cast and rod–shaped alloys. SEM/EDS and XRD technology were used to examine the impacts of the Al–element content on the alloys’ microstructure, mechanical characteristics, electrical conductivity, wetting ability, and corrosion resistance. The findings demonstrate how the Zn-Al alloy’s microstructure is dramatically altered by the different additions of the Al content. When the Al content reaches 15 wt.%, the eutectoid structures of the as–cast Zn-Al alloy are the finest, and the microhardness and tensile strength of the extruded–state alloy reach their maximum and exhibit the best corrosion resistance. The spreading area of the Zn-15Al solder alloy achieves its maximum on the 6061 Al plate, while it reaches its minimum on the T2 Cu plate. Furthermore, the electrical resistivity of the Zn-Al alloy continuously decreases as the Al content increases.

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Section: Effect Of Al Content On the Rate Of Self-corrosion Of Zn-al ...mentioning

confidence: 99%

Section: Effect Of Al Content On the Self-corrosion Potential Of Alloysmentioning

confidence: 99%

Effect of Al Content on the Microstructure and Properties of Zn-Al Solder Alloys

Zhai,

Wang,

Liu

et al. 2024

Metals

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“…The difficulties in this process include the inability to precisely control the flux, excessive residual flux and cleaning after brazing, which lead to serious wastage of flux and environmental pollution [4], as well as affecting the service life of weldments [5]. With the development trend of automatic and green brazing [6], these problems of filler alloy overflowing, poor joint quality and environmental pollution caused by excessive flux when using traditional filler alloy [7] and flux must be solved urgently.…”

Section: Introductionmentioning

confidence: 99%

Research Progress in Relation to Composite Brazing Materials with Flux

Wang

Long

Wang³

et al. 2021

Crystals

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Brazing was one of the earliest material-joining methods to be invented and widely used by humans. In the past 30 years, the technology and materials employed for brazing have developed rapidly and continuously. With the rise of the international new industrial revolution, the manufacturing industry is moving towards diversification, and brazing filler metals are also evolving in the direction of eco-friendliness, compounding and diversification. In the “carbon neutral” environment of 2021, green composite brazing materials will become mainstream. In this paper, the classification and characteristics of flux-containing brazing materials are summarized, and the preparation technology, composition design and typical application of composite brazing materials such as flux-cored brazing filler metal, flux-coated brazing filler metal and powder metallurgy brazing filler metal are analyzed. The article highlights the problems encountered in the research and development of composite brazing materials and proposes future development directions, such as with low-silver and cadmium-free brazing filler metals, the creation of new powder brazing filler metal-forming technology and improvements to the quality of brazing filler metals by shape control and performance optimization, to accelerate the process of brazing automation.

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Influence of the application of ultrasound on the microstructure of cemented carbide/steel joints brazed with Ag49ZnCuMnNi

Wojarski,

Tillmann,

Ulitzka

et al. 2023

Weld World

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The poor wettability of cemented carbides by molten metals as well as the different material properties compared to steel makes thermal joining process challenging. In this regard, innovative ultrasonic-assisted induction brazing is capable of joining the materials quickly, cost-effectively and without using environmentally hazardous fluxes. Instead, the oxide scales are broken up within the joining process due to ultrasonic-induced cavitation in the molten filler alloy and hence promote the wetting. However, since the use of ultrasound in brazing steel/cemented carbide joints is still insufficiently investigated, there is still a need to explore the fundamental influences of ultrasound on the brazing process. In this work, the effect of ultrasound on the microstructure of the brazed joints and the diffusion depth of different elements were analysed. The two ultrasonic parameters activation time and amplitude were varied during the experiments. Acicular or dendritic structures that have formed in the braze metal without ultrasonic stimulation were transformed into globular structures, when ultrasound was applied. In addition, a non-eutectic silver-rich phase formed, which was not observed in joints manufactured without the use of ultrasound. Furthermore, the use of ultrasound led to increased diffusion between the base material and the filler material as well as the dissolution and distribution of oxides in the edge regions of the brazing joints.

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Research on the corrosion resistance of Cu-Al joints brazed with flux-cored Zn-2Al filler metal

Cited by 7 publications

References 18 publications

Effect of Al Content on the Microstructure and Properties of Zn-Al Solder Alloys

Effect of Al Content on the Microstructure and Properties of Zn-Al Solder Alloys

Research Progress in Relation to Composite Brazing Materials with Flux

Influence of the application of ultrasound on the microstructure of cemented carbide/steel joints brazed with Ag49ZnCuMnNi

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