Aluminizing and oxidation treatment of 1Cr18Ni9 stainless steel

in Wiley InterScience (www.interscience.wiley.com).A promising method for aluminium deposition was proposed by using AlCl 3 /[bmim]Cl (1-butyl-3-methylimidazolium chloride) ionic liquid as electrolyte. By using this novel method, the volatile and flammable organic solvent systems and the high corrosive inorganic molten salts with high temperature can be substituted, and the deposit microstructure can be easily adjusted by changing the current density, temperature and electrolyte composition. The study was performed by means of galvano-static electrolysis and the optimum operating conditions were determined based on the systematic studies of the effects of current density, temperature, molar ratio of AlCl 3 to [bmim]Cl, stirring speed and deposition time on the quality of deposited coatings. The electrical conductivities of electrolytes were also investigated as a function of temperature (298-358 K) and molar ratio of AlCl 3 to [bmim]Cl (from 0.1:1 to 2.0:1). Dense, bright and adherent aluminium coatings were obtained over a wide range of temperature (298-348 K), current densities (8-44 mA/cm 2 ) and molar ratio (1.6:1-2.0:1). Results from the analysis of crystal structure show that all of the electrodeposits exhibit a preferred (200) crystallographic orientation. Temperature has significant influence on the crystallographic orientation and there does not appear to be an apparent impact of current density on it. Analyses of the chronoamperograms indicate that the deposition process of aluminium on stainless steel was controlled by three-dimension nucleation with diffusion-controlled growth and there is a conversion from progressive nucleation to instantaneous nucleation.

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“…The dimensionless plots, (i/i m ) 2 vs. (t/t m ) along with theoretical curves from Eq. 6 and 7, are shown in Figure 14.…”

Section: Nucleation and Growth Process For The Electrodeposition Of Almentioning

confidence: 99%

A promising method for electrodeposition of aluminium on stainless steel in ionic liquid

et al. 2009

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“…Rajah 5 menunjukkan nilai kekerasan lebih tinggi dicatatkan pada lapisan antara logam manakala lapisan Al mencatatkan nilai kekerasan paling rendah. Lapisan Al mempunyai nilai kekerasan lebih rendah kerana strukturnya lebih berliang (Wang & Shi 2004). Peningkatan nilai kekerasan antara logam adalah disebabkan kewujudan fasa antara logam Fe-Al yang lebih keras dan rapuh yang mampu meningkatkan kekerasan lapisan antara logam.…”

Section: Bahan Dan Kaedahunclassified

“…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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“…), it, owing to its excellent oxide forming ability, can also be used to coat steel to provide the anodic protection. In industry, Al coating is being carried out by a variety of processes that include hot dipping [3,4], thermal spraying [5], sputter deposition [6,7], vapor deposition [8,9] and electrodeposition [10,11] processes. From among these techniques, electrodeposition stands out in terms of several advantages, such as relatively ease of operation, and possibility of obtaining uniform, thick, adherent and smooth coating even on complex objects with adjustable microstructure/morphological features/thickness.…”

Section: Introductionmentioning

confidence: 99%

“…SEM image of the annealed aluminum coating on the SS316 plate (after~100 h) of OCP,[1]: SS substrate;[2]: AlFe alloy layer and[3]: Al-O layer;[4]: Epoxy (re-modified).…”

mentioning

confidence: 99%

Aluminum electroplating on steel from a fused bromide electrolyte

Tripathy

Wurth²,

Dufek

et al. 2014

Surface and Coatings Technology

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A quaternary bromide bath (LiBr-KBr-CsBr-AlBr 3 ) was used to electro-coat aluminum on steel substrates. The electrolyte was prepared by the addition of AlBr 3 into the eutectic LiBr-KBr-CsBr melt. A smooth, thick, adherent and shiny aluminum coating could be obtained with 80 wt.% AlBr 3 in the ternary melt. The SEM photographs of the coated surfaces suggest the formation of thick and dense coatings with good aluminum coverage. Both salt immersion and open circuit potential measurement suggested that the coatings did display a good corrosionresistance behavior. Annealing of the coated surfaces, prior to corrosion tests, suggested the robustness of the metallic aluminum coating in preventing the corrosion of the steel surfaces. Studies also indicated that the quaternary bromide plating bath can potentially provide a better aluminum coating on both ferrous and non-ferrous metals, including complex surfaces/geometries.Published by Elsevier B.V.

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Aluminizing and oxidation treatment of 1Cr18Ni9 stainless steel

Cited by 64 publications

References 11 publications

A promising method for electrodeposition of aluminium on stainless steel in ionic liquid

A promising method for electrodeposition of aluminium on stainless steel in ionic liquid

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

Aluminum electroplating on steel from a fused bromide electrolyte

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