Al–Mg–Mn alloy coating on steel with superior corrosion behavior

Pradhan, Debabrata; Manna, M.; Dutta, Moumita

doi:10.1016/j.surfcoat.2014.08.061

Cited by 13 publications

(8 citation statements)

References 41 publications

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“…[15][16][17][18]. Studies using Al-Mn coatings have shown that Mn can be used to improve the corrosion resistance of the coating layer, as studied by Xinmei Li et al [19] and Debabrata Pradhan et al [20]. Xinmei Li et al [19] performed a hot-dipping process for 10 min using pure Al, Al-2 wt.% Mn, Al-9 wt.% Mn, and Al-13 wt.% Mn composites on low-carbon steel.…”

Section: Introductionmentioning

confidence: 99%

“…After hot dipping, a scratch test was conducted to characterize adhesion, showing that the coating layer containing Mn adhered well. Debabrata Pradhan et al [20] reported that steel sheets in hot dipping of Al-Mg-Mn alloys have about six times better corrosion resistance than zinc coating. Studies have also been performed on the growth rate of intermetallic compounds formed after the reaction of liquid Al and solid Fe and on the corrosion resistance of Al-Mn-coated layers.…”

Section: Introductionmentioning

confidence: 99%

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Identification of Intermetallic Compounds and Its Formation Mechanism in Boron Steel Hot-Dipped in Al-7 wt.% Mn Alloy

et al. 2017

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Abstract:In laser welding and hot stamping Al-Si-coated boron steel, there is a problem that the strength of the joint is lowered due to ferrite formation in the fusion zone. The purpose of this study is to develop an Al-7 wt.% Mn hot-dip coating in which Mn, an austenite stabilizing element, replaces the ferrite stabilizing element Si. The nucleation and formation mechanism of the reaction layer was studied in detail by varying the dipping time between 0 and 120 s at 773 • C. The microstructure and phase constitution of the reaction layer were investigated by various observational methods. Phase formation is discussed using a phase diagram calculated by Thermo-Calc TM . Under a 30 s hot-dipping process, no reaction occurred due to the formation of a Fe 3 O 4 layer on the steel surface. The Fe 3 O 4 layer decomposed by a reduction reaction with Al-Mn molten alloy, constituent elements of steel dissolved into a liquid, and the reaction-layer nucleus was formed toward the liquid phase. A coated layer consists of a solidified layer of Al and Al 6 Mn and a reactive layer formed beneath it. The reaction layer is formed mainly by inter-diffusion of Al and Fe in the solid state, which is arranged on the steel in the order of Al 11 Mn 4 → FeAl 3 (θ) → Fe 2 Al 5 (η) phases, and the Fe 3 AlC (κ) in several nm bands formed at the interface between the η-phase and steel.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Identification of Intermetallic Compounds and Its Formation Mechanism in Boron Steel Hot-Dipped in Al-7 wt.% Mn Alloy

et al. 2017

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“…Nilai-nilai kekerasan ini adalah sejajar dengan keputusan yang diperoleh melalui kajian terdahulu yang mendapati nilai kekerasan sedemikian adalah fasa antara logam Fe-Al (Kobayashi & Yakou 2002;Pradhan et al 2014;Wang & Shi 2004). Peningkatan suhu celupan ini telah meningkatkan nilai mikro kekerasan lapisan antara logam walaupun perubahan itu berlaku pada julat yang kecil.…”

Section: Bahan Dan Kaedahunclassified

Kesan Suhu Celupan ke atas Mikrostruktur dan Kekerasan Salutan Aluminium pada Keluli Karbon

Salleh

Samsu

Othman³

et al. 2018

JSM

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“…Hot-dip Al-coated steel sheets with excellent corrosion resistance, high-temperature durability, and thermal insulation properties are employed in several industrial applications, such as power plants, exhaust systems, and heating equipment [1][2][3]. Al-based coatings can be classified into two categories based on their composition: type-1 and type-2 [1,4]; type-1 coatings comprise Al-Si alloys with 7-11 wt.% of Si, while type-2 coatings comprise pure Al (with no Si) [4]. Although such coatings exhibit high corrosion resistance under atmospheric conditions owing to the formation of stable Al 2 O 3 surface films, they are unstable in chloride-containing environments [1,5,6].…”

Section: Introductionmentioning

confidence: 99%

Effects of the Mg Content on Microstructural and Corrosion Characteristics of Hot-Dip Al–Si–Mg Alloy-Coated Steel Sheets

Jin,

2023

Materials

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Hot-dip Al–Si alloy coatings with excellent resistance to corrosion and high-temperature oxidation have emerged as promising lightweight substitutes for conventional corrosion-resistant coatings. The introduction of Mg can be an effective strategy for enhancing the sacrificial protection capability of Al–Si coatings. In this study, the effects of Mg addition on the morphology, electrochemical behavior, and mechanical properties of Al–Si coatings were investigated, along with the Mg-content optimization of the coating layer. Adding Mg promoted the formation of finely distributed eutectic intermetallic phases, such as Al/Mg2Si and the primary Mg2Si phase. Notably, the Mg2Si phase coarsened significantly when ≥15 wt.% of Mg was added. In addition, an Al3Mg2 intermetallic compound was observed in coating layers containing >20 wt.% of Mg, reducing the adhesion of the coating layers. Samples containing 5–10 wt.% of Mg exhibited excellent corrosion resistance (owing to a uniform distribution of the fine eutectic Al/Mg2Si phase and the formation of stable corrosion products), whereas those containing 20 wt.% of Mg exhibited unremarkable corrosion resistance (owing to the formation of an Al3Mg2 phase that is susceptible to intergranular corrosion).

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Al–Mg–Mn alloy coating on steel with superior corrosion behavior

Cited by 13 publications

References 41 publications

Identification of Intermetallic Compounds and Its Formation Mechanism in Boron Steel Hot-Dipped in Al-7 wt.% Mn Alloy

Identification of Intermetallic Compounds and Its Formation Mechanism in Boron Steel Hot-Dipped in Al-7 wt.% Mn Alloy

Kesan Suhu Celupan ke atas Mikrostruktur dan Kekerasan Salutan Aluminium pada Keluli Karbon

Effects of the Mg Content on Microstructural and Corrosion Characteristics of Hot-Dip Al–Si–Mg Alloy-Coated Steel Sheets

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