Top

Metallurgist

Published in:

12-03-2024

Structure and Properties of Coatings Formed on Cast Al–Ca Alloys by Plasma Electrolytic Oxidation

Authors: N. V. Letyagin, T. К. Akopyan, A. A. Sokorev, A. G. Tsydenov, A. F. Musin, P. A. Palkin

Published in: Metallurgist | Issue 9-10/2024

Activate our intelligent search to find suitable subject content or patents.

search-config

AI-assisted search

Off

Abstract

The structure and properties of coatings formed by plasma electrolytic oxidation (PEO) on as-cast Al–Ca alloy (7 wt.% Ca) and pure Al (99.99 wt.% Al) are studied. It is shown that substrates have a significant impact on the quality, structure and properties of a coating formed. According to SEM analysis results, presence of Ca within a substrate leads to an increase in coating thickness, an increase in inner layer porosity, as well as formation of a wide calcium-containing region within a coating outer layer. Calcium contributes to a significant change in coating phase composition (α-Al₂O₃/g-Al₂O₃), preventing a-Al₂O₃ formation. A change in phase composition leads to a reduction in coating average microhardness from 912 HV on pure aluminum to 714 HV for a coating upon Al–Ca alloy. The electrochemical behavior of as-cast Al7Ca alloy and PEO-treated alloys in 3.5% NaCl solution is studied. As a result of electrochemical studies, it is found that a PEO coating significantly increases corrosion resistance, demonstrating a decrease in corrosion current density (0.410–3 mA/cm²) compared with an uncoated specimen (7.1× 10^–3 mA/cm²). A coating formed upon pure aluminum due to greater uniformity shows a lower corrosion current density value (0.0710–3 mA/cm²) and improved corrosion properties.

previous article Anodic Behavior of AK7 Aluminum Alloy and Composite Material of the Al–Al2O3 System within an NaCl Electrolyte Solution Medium

next article Material Science Aspects of Titanium Tube Production. Part 2. Production of Cold-Rolled Tubes

Dont have a licence yet? Then find out more about our products and how to get one now:

Springer Professional "Wirtschaft+Technik"

Online-Abonnement

Mit Springer Professional "Wirtschaft+Technik" erhalten Sie Zugriff auf:

über 102.000 Bücher
über 537 Zeitschriften

aus folgenden Fachgebieten:

Automobil + Motoren
Bauwesen + Immobilien
Business IT + Informatik
Elektrotechnik + Elektronik
Energie + Nachhaltigkeit
Finance + Banking
Management + Führung
Marketing + Vertrieb
Maschinenbau + Werkstoffe
Versicherung + Risiko

Jetzt Wissensvorsprung sichern!

inform now

Springer Professional "Technik"

Online-Abonnement

Mit Springer Professional "Technik" erhalten Sie Zugriff auf:

über 67.000 Bücher
über 390 Zeitschriften

aus folgenden Fachgebieten:

Automobil + Motoren
Bauwesen + Immobilien
Business IT + Informatik
Elektrotechnik + Elektronik
Energie + Nachhaltigkeit
Maschinenbau + Werkstoffe

Jetzt Wissensvorsprung sichern!

inform now

A. G. Rakoch, A. A. Gladkova, and A. V. Dub, Plasma-Electrolytic Treatment of Aluminum and Titanium Alloys [in Russian], ID MISiS, Moscow (2017).

L. Zhu, Z. Guo, Y. Zhang, Z. Li, and M. Sui, “A mechanism for the growth of a plasma electrolytic oxide coating on Al,” Electrochim. Acta., 208, 296–303 (2016); DOI: https://doi.org/10.1016/j.electacta.2016.04.186.CrossRef

N. Yu. Dudareva, A. B. Kruglov, and R. Gallyamova, “Structure and thermophysical properties of coatings formed by the method of microarc oxidation on an aluminum alloy AK4–1,” Solid State Phenom., 284, 1235–1241 (2018); DOI: https://doi.org/10.4028/www.scientific.net/SSP.284.1235.CrossRef

X. Huang and L. Famiyeh, “Plasma electrolytic oxidation coatings on aluminum alloys: microstructures, properties, and applications,” Modern Concepts in Mater. Sci., 2, 1–13 (2019); DOI: https://doi.org/10.33552/MCMS.2019.02.000526.CrossRef

Y.-J. Oh, J.-I. Mun, and J.-H. Kim, “Effects of alloying elements on microstructure and protective properties of Al₂O₃ coatings formed on aluminum alloy substrates by plasma electrolysis,” Surface & Coatings Technology, 204, 141–148 (2009); DOI:https://doi.org/10.1016/j.surfcoat.2009.07.002.CrossRef

T. Wu, C. Blawerta, and M. L. Zheludkevich, “Influence of secondary phases of AlSi9Cu3 alloy on the plasma electrolytic oxidation coating formation process,” J. Mater. Sci. Technol., 50, 75–85 (2020); DOI: https://doi.org/10.1016/j.jmst.2019.12.031.CrossRef

A. E. Gulec, Y. Gencer, and M. Tarakci, “The characterization of oxide based ceramic coating synthesized on Al–Si binary alloys by microarc oxidation,” Surf. Coating. Technol., 269, 100–107 (2015); DOI: https://doi.org/10.1016/j.surfcoat.2014.12.031.CrossRef

K. Li, W. Li, G. Zhang, W. Zhu, F. Zheng, D. Zhang, and M. Wang, “Effects of Si phase refinement on the plasma electrolytic oxidation of eutectic Al–Si alloy,” J. Alloys. Compd., 790, 650–656 (2019); DOI: https://doi.org/10.1016/j.jallcom.2019.03.217.CrossRef

A. B. Rogov, H. Lyu, A. Matthews, and A. Yerokhin, “AC plasma electrolytic oxidation of additively manufactured and cast AlSi12 alloys,” Surf. Coat. Technol., 399, 126116 (2020); DOI: https://doi.org/10.1016/j.surfcoat.2020.126116.CrossRef

10.

L. Pezzato, M. Dabala, S. Gross, and K. Brunelli, “Effect of microstructure and porosity of AlSi10Mg alloy produced by selective laser melting on the corrosion properties of plasma electrolytic oxidation coatings,” Surf. Coat. Technol., 404, 126477 (2020); DOI: https://doi.org/10.1016/j.surfcoat.2020.126477.CrossRef

11.

S. Cengiz, “Synthesis of eutectic Al–18Ce alloy and effect of cerium on the PEO coating growth,” Mater. Chem. Phys., 247, 122897 (2020); DOI: 0.1016/j.matchemphys.2020.122897.

12.

K. A. Cosan, K. O. Gunduz, M. Tarakcı, and Y. Gencer, “Plasma electrolytic oxidation of as-cast and heat-treated binary Al–Ni alloys,” Surf. Coat. Technol., 450. 128998 (2020); DOI: https://doi.org/10.1016/j.surfcoat.2022.128998.

13.

N. A. Belov, E. A. Naumova, and T. K. Akopyan, Eutectic Alloys Based Upon Aluminum: New Alloy Systems [in Russian], Ruda i Metally, Moscow (2016).

14.

T. K. Akopyan, N. V. Letyagin and N. N. Avxentieva, “Hightech alloys based on Al–Ca–La(–Mn) eutectic system for casting, metal forming and selective laser melting,” Non-Ferrous Metals, No. 1, 52–59 (2020); DOI: https://doi.org/10.17580/nfm.2020.01.09.CrossRef

15.

T. K. Akopyan, N. V. Letyagin, T. A. Sviridova, N. O. Korotkova, and A. S. Prosviryakov, “New casting alloys based on the Al+Al4(Ca,La) eutectic,” JOM, 72, 3779–3786 (2020); DOI: https://doi.org/10.1007/s11837–020–04340-z

16.

N. V. Letyagin, A. F. Musin, and L. S. Sichev “New aluminum-calcium casting alloys based on secondary raw materials,” Materials Today: Proceedings, 38, 1551–1555 (2021); DOI: https://doi.org/10.1016/j.matpr.2020.08.148.

17.

N. A. Belov, E. A. Naumova, V. D. Ilyukhin, and V. V. Doroshenko, “Structure and properties of Al – 6% Ca – 1% Fe alloy castings prepared by casing under pressure,” Tsvet. Met., No. 3, 69–75 (2017); DOI: https://doi.org/10.17580/tsm.2017.03.11.

18.

V. V. Doroshenko, E. A. Naumova, M. A. Barykin, and A. N. Koshmin, “Study of technological properties of new aluminumcalcium alloys for pistons of internal combustion Engines,” Tsvetnye Metally, No. 1, 62–71 (2022); DOI: https://doi.org/10.17580/tsm.2022.01.08.CrossRef

19.

O. V. Volkova, A. V. Dub, A. G. Rakoch, A. A. Gladkova, and M. E. Samoshna, “Comparison of tendency towards pitting corrosion of castings of experimental alloys Al6Ca, Al1Fe, Al6Ca1Fe and industrial alloy AK12M2,” Izv. Vuzov. Tsvet. Met., No. 5, 75–81 (2017); DOI: https://doi.org/10.17073/0021-3438-2017-5-75-81.

20.

C. Liu, Q. Wang, X/ Cao, L. Cha, R. Ye, and C. S. Ramachandran, “Significance of plasma electrolytic oxidation treatment on corrosion and sliding wear performances of selective laser melted AlSi10Mg alloy,” Mater Charact., 181, 111479 (2021); DOI: https://doi.org/10.1016/j.matchar.2021.111479.

21.

K. Li, W. Li, G. Zhang, and P. Guo, “Preparation of black PEO layers on Al–Si alloy and the colorizing analysis,” Vacuum, 111, 131–136 (2015); DOI: https://doi.org/10.1016/j.vacuum.2014.10.008.CrossRef

22.

L. Pezzato, M. Rigon, A. Martucci, K. Brunelli, and M. Dabala, “Plasma Electrolytic Oxidation (PEO) as pretreatment for sol-gel coating on aluminum and magnesium alloys,” Surf. Coat. Technol., 366, 114–123 (2019); DOI: https://doi.org/10.1016/j.surfcoat.2019.03.023.CrossRef

23.

N. Yu. Dudareva, A. V. Kolomeichenko, V. B. Deev, and V. M. Sitdikov, “Porosity of oxide ceramic coatings formed by micro-arc oxidation on high-silicon aluminum alloys,” J. Surface Investigation: X-ray, Synchrotron and Neutron Techniques, 16, 1308–1314 (2022); DOI: https://doi.org/10.1134/S1027451022060362.CrossRef

24.

P. Jantimapornkij, J. Zerrer, and A. Buling, “Advanced corrosion protection of additive manufactured light metals by creating ceramic surface through CERANOD plasma electrolytical oxidation process,” Front. Chem. Sci. Eng., 3, 734644 (2021); DOI: https://doi.org/10.3389/fceng.2021.734644.CrossRef

Title: Structure and Properties of Coatings Formed on Cast Al–Ca Alloys by Plasma Electrolytic Oxidation
Authors: N. V. Letyagin
T. К. Akopyan
A. A. Sokorev
A. G. Tsydenov
A. F. Musin
P. A. Palkin
Publication date: 12-03-2024
Publisher: Springer US
Published in: Metallurgist / Issue 9-10/2024
Print ISSN: 0026-0894
Electronic ISSN: 1573-8892
DOI: https://doi.org/10.1007/s11015-024-01640-6

Springer Professional

Abstract

Please log in to get access to your license.

Dont have a licence yet? Then find out more about our products and how to get one now:

Springer Professional "Wirtschaft+Technik"

Springer Professional "Technik"

Other articles of this Issue 9-10/2024

Modeling Thermal Welding Cycles of Medium-Carbon High-Strength Steels for Predicting the Mechanical Properties of Real Welded Joints

Structure and Properties of Welded Joints of High-Strength Steels Made by Metal-Cored Wire with Nitrogen

Aspects of Continuous Rolling When Starting with Unreduced Strip

Anodic Behavior of AK7 Aluminum Alloy and Composite Material of the Al–Al2O3 System within an NaCl Electrolyte Solution Medium

Mathematical Modeling of Extrusion Agglomeration

Metallurgist Volume 67, Number 10

Premium Partners