Corrosion resistance of dilute CuMg alloys at elevated temperature

Liu, G.J.; Jia, Shusheng; Hong, Sang Hwui; Lim, Joo Won; Zhu, Yongfu; Mimura, Kouji; Isshiki, Minoru

doi:10.1016/j.corsci.2008.12.009

Cited by 8 publications

(4 citation statements)

References 14 publications

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“…There are several metallic elements that can be used as coatings, such as zinc, chromium, magnesium and aluminium as they are proved to protect against different corrosion types. 5 Magnesium has very negative free energy due to the creation of MgO in dry air, 6 but it is also a strong oxidant in damp environment or moist air. In addition, magnesium is preferred as coating material on copper components because it does not affect significantly the beneficial electric properties of Cu due to its low electrical resistivity (4·45 μΩ cm).…”

Section: Introductionmentioning

confidence: 99%

Protection of Cu components with Mg and Al coatings deposited by pack cementation

Stathokostopoulos¹,

Chaliampalias²,

Pavlidou³

et al. 2014

Surface Engineering

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The growth of Mg and Al coatings on copper by pack cementation is examined in this work by investigating the mechanism of the process, the effect of temperature and heating time on the coating structure. The experiments were undertaken at temperatures ranging from 550 to 600uC, while the duration of the process varied from 30 min to 3 h. It was found that the magnesium coatings consist of two phases corresponding to MgCu 2 and CuMg 2 . These phases appeared as distinguished layers or mixed with each other, depending on the deposition temperature and duration. On the other hand, the aluminium coatings consist of a single Al 4 Cu 9 phase whose thickness increases with deposition time and temperature. Finally, the oxidation resistance was also evaluated by thermogravimetric measurements, which revealed that the coated samples have superior resistance to bare copper, while Al coated coupons had the best performance when exposed in high temperature environment.

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Section: Introductionmentioning

confidence: 99%

Protection of Cu components with Mg and Al coatings deposited by pack cementation

Stathokostopoulos¹,

Chaliampalias²,

Pavlidou³

et al. 2014

Surface Engineering

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“…Many research papers have been devoted to the topic of corrosion, its mechanisms of formation, and means of protection using the mentioned coatings applied to both copper alloys [26][27][28][29] and magnesium alloys [30][31][32][33]. However, only one paper concerning CuMg alloys and their corrosion resistance has been published, which presents the results of alloys with a magnesium content below 0.4 wt.% [34]. Ignoring the influence of the atmosphere, which may be prevented with the above-mentioned coatings, CuMg alloys seem to be a promising material in terms of electrical conductivity and good mechanical properties, and result in a reasonably priced final conductor.…”

Section: Introductionmentioning

confidence: 99%

Pure Alloy Additive or Preliminary Alloy: A Comparative Study on Obtaining High-Strength Copper Magnesium Alloys Designed for Electrical Power Systems

Strzępek

Zasadzińska

2022

Energies

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Due to the increasing demand for electrical energy in modern society, there is a huge requirement for conducting materials and, due to the development of electromobility, this demand is forecasted to grow each year. This is one of the reasons why copper and copper alloys manufacturing and processing industries tend to evolve and improve. One of the improvement paths is the design of new conducting materials for electrical power systems, electrical energy transmission, and energy storage systems. This paper presents a comparative study on obtaining high-strength copper magnesium alloys in terms of the alloy additive used during the metallurgical synthesis process, because this is a crucial, initial element in obtaining the final conducting product, such as wires. The obtained ingots were tested in terms of their chemical composition, and mechanical and physical properties. The provided results prove that there is a significant increase in the materials’ hardness (and thus the ultimate tensile strength), and a slight decrease in density, impact resistance, and electrical conductivity, as the Mg content increases. Scanning electron microscopy (SEM) and phase analysis were additionally conducted in order to determine the distribution and origin of Mg precipitations. Collectively, the results show that the CuMg alloys may successfully replace other alloys, such as CuNiSi or CuZn, as carrying and conducting materials because their properties are superior to those of the aforementioned materials.

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“…There are many research papers accessible which concern the topic of corrosion progression and explaining the mechanisms of corrosion formation, occurring and place of origin, as well as the ways of protection from damaging outcomes with the use of, for example, the abovementioned coatings both in terms of copper alloys [5][6][7][8] and magnesium alloys [9][10][11][12]. There is only one research paper concerning copper magnesium alloys and their corrosion resistance and unfortunately it presents research results on single-phase CuMg alloys [13]. The phase diagram of CuMg alloy [14] depicts distinctly visible intermetallic Cu 2 Mg and CuMg 2 phases (Laves phases) which were examined in [15,16] by Schubert et al and Lieser et al Additionally, Miroshnichenko et al [17] proved the existence of metastable intermetallic Cu 3 Mg phase.…”

Section: Introductionmentioning

confidence: 99%

“…Another work treating on CuMg alloys with 0.4 wt.% of magnesium with micro additions of approximately 0.15 wt.% of Ce and Y was provided by Wang et al where they stated that both additions increase the mechanical properties even more when hot deformed at the temperature range of 500 • C to 850 • C in comparison to alloys without these micro additions [24]. However, regardless of its extraordinary mechanical properties the authors in [13] claim that single-phase copper magnesium alloys have lower corrosion resistance in comparison to e.g., copper aluminum alloys in elevated temperatures and the authors attributed this fact to the incorporation of Cu in the MgO surface layer which might disqualify the use of this alloys in specific applications without the use of galvanic coating. Research works conducted all over the world by many various research teams have proven that magnesium copper alloys have very high strength properties with reasonable electrical conductivity and may function as a fine substitute to copper alloys with i.e., cadmium which is considered to be toxic in many countries [25].…”

Section: Introductionmentioning

confidence: 99%

The Influence of the Continuous Casting Conditions on the Properties of High-Strength Two-Phase CuMg Alloys

et al. 2020

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Constant tendency toward the improvement of the material properties nowadays creates opportunities for the scientists all over the world to design and manufacture new alloys almost every day. Considering the fact that companies all over the world desire alloys with the highest values of mechanical properties often coexisting with a reasonable electrical conductivity made it necessary to develop new materials based on Cu, such as CuMg alloys. However, before such new material may be mass produced it must undergo a series of tests in order to determine the production technology, its parameters and influence on the chemical composition, microstructural properties, and both mechanical and physical properties of CuMg alloys. The research tests have shown that with the increase of the casting feed the Brinell’s hardness of each material slightly increases (by 5 HB2.5/62.5). There is little to none impact of the casting feed on the electrical conductivity, values of which are between 20.6 and 21.4 MS/m (around 40% IACS-International Annealed Copper Standard) depending on the Mg content. The conducted scanning electron microstopy (SEM) analysis has shown that the magnesium precipitations are evenly distributed among the volume of the alloy, however, a significant difference in the density and shape of the Cu + Cu2Mg aggregates was noticed regarding various casting feed. Static compression test proved that these alloys may be subjected to strain hardening as the hardness of the material after compression increases by approximately 40 HB2.5/62.5.

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Corrosion resistance of dilute CuMg alloys at elevated temperature

Cited by 8 publications

References 14 publications

Protection of Cu components with Mg and Al coatings deposited by pack cementation

Protection of Cu components with Mg and Al coatings deposited by pack cementation

Pure Alloy Additive or Preliminary Alloy: A Comparative Study on Obtaining High-Strength Copper Magnesium Alloys Designed for Electrical Power Systems

The Influence of the Continuous Casting Conditions on the Properties of High-Strength Two-Phase CuMg Alloys

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