Energy consumption, wear and corrosion of PEO coatings on preanodized Al alloy: the influence of current and frequency

Marta MOHEDANO; E. Lopez; Beatriz Mingo; S. Moon; Endzhe Matykina; Raul Arrabal

doi:10.1016/j.jmrt.2022.10.049

Energy consumption, wear and corrosion of PEO coatings on preanodized Al alloy: the influence of current and frequency

Marta MOHEDANO, E. Lopez, Beatriz Mingo, S. Moon, Endzhe Matykina, Raul Arrabal

Materials Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

The influence of current and frequency on energy consumption of plasma electrolytic oxidation (PEO) of a commercial aluminium alloy pre-treated by conventional anodizing in sulphuric acid has been investigated. The combination of a 20-μm thick precursor anodic porous film, high current (500 mA cm-2) and frequency (400 Hz) during PEO enables up to 76% energy savings compared to direct PEO treatment (50 Hz). The time needed to achieve a uniform coating thickness was also reduced from 3350 s to 750 s, for PEO_50 and A + PEO_400, respectively. The wear and corrosion performance of the optimised coatings (400 Hz) were also improved despite the lower thickness of the coatings. Such improvement was mainly attributed to the microstructural refinement associated with high frequency processing and early transaction to the "soft-sparking"regime. The modification of the frequency has a stronger influence on the corrosion response than the presence of the anodic precursor. The best corrosion response was obtained for PEO_400 followed closely by A + PEO_400.

Original language	English
Pages (from-to)	2061-2075
Number of pages	15
Journal	Journal of Materials Research and Technology
Volume	21
Early online date	28 Oct 2022
DOIs	https://doi.org/10.1016/j.jmrt.2022.10.049
Publication status	Published - 1 Nov 2022

Keywords

Aluminum
Anodizing
Plasma electrolytic oxidation

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10.1016/j.jmrt.2022.10.049

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title = "Energy consumption, wear and corrosion of PEO coatings on preanodized Al alloy: the influence of current and frequency",

abstract = "The influence of current and frequency on energy consumption of plasma electrolytic oxidation (PEO) of a commercial aluminium alloy pre-treated by conventional anodizing in sulphuric acid has been investigated. The combination of a 20-μm thick precursor anodic porous film, high current (500 mA cm-2) and frequency (400 Hz) during PEO enables up to 76% energy savings compared to direct PEO treatment (50 Hz). The time needed to achieve a uniform coating thickness was also reduced from 3350 s to 750 s, for PEO_50 and A + PEO_400, respectively. The wear and corrosion performance of the optimised coatings (400 Hz) were also improved despite the lower thickness of the coatings. Such improvement was mainly attributed to the microstructural refinement associated with high frequency processing and early transaction to the {"}soft-sparking{"}regime. The modification of the frequency has a stronger influence on the corrosion response than the presence of the anodic precursor. The best corrosion response was obtained for PEO_400 followed closely by A + PEO_400.",

keywords = "Aluminum, Anodizing, Plasma electrolytic oxidation",

author = "Marta MOHEDANO and E. Lopez and Beatriz Mingo and S. Moon and Endzhe Matykina and Raul Arrabal",

note = "Funding Information: The authors gratefully acknowledge the support of PID2021-124341OB-C22 (MCIU/AEI/FEDER, UE) and ADITIMAT-CM (S2018/NMT-4411, Regional Government of Madrid and EUStructural Funds). M. Mohedano is grateful for the support of RYC-2017-21843 Ministerio de Ciencia e Innovaci{\'o}n. B. Mingo is supported by the Royal Academy of Engineering through the RAEng Research Fellowship and by EPSRC (EP /V026097/1). Publisher Copyright: {\textcopyright} 2022 The Author(s).",

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doi = "10.1016/j.jmrt.2022.10.049",

language = "English",

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T1 - Energy consumption, wear and corrosion of PEO coatings on preanodized Al alloy: the influence of current and frequency

AU - MOHEDANO, Marta

AU - Lopez, E.

AU - Mingo, Beatriz

AU - Moon, S.

AU - Matykina, Endzhe

AU - Arrabal, Raul

N1 - Funding Information: The authors gratefully acknowledge the support of PID2021-124341OB-C22 (MCIU/AEI/FEDER, UE) and ADITIMAT-CM (S2018/NMT-4411, Regional Government of Madrid and EUStructural Funds). M. Mohedano is grateful for the support of RYC-2017-21843 Ministerio de Ciencia e Innovación. B. Mingo is supported by the Royal Academy of Engineering through the RAEng Research Fellowship and by EPSRC (EP /V026097/1). Publisher Copyright: © 2022 The Author(s).

PY - 2022/11/1

Y1 - 2022/11/1

N2 - The influence of current and frequency on energy consumption of plasma electrolytic oxidation (PEO) of a commercial aluminium alloy pre-treated by conventional anodizing in sulphuric acid has been investigated. The combination of a 20-μm thick precursor anodic porous film, high current (500 mA cm-2) and frequency (400 Hz) during PEO enables up to 76% energy savings compared to direct PEO treatment (50 Hz). The time needed to achieve a uniform coating thickness was also reduced from 3350 s to 750 s, for PEO_50 and A + PEO_400, respectively. The wear and corrosion performance of the optimised coatings (400 Hz) were also improved despite the lower thickness of the coatings. Such improvement was mainly attributed to the microstructural refinement associated with high frequency processing and early transaction to the "soft-sparking"regime. The modification of the frequency has a stronger influence on the corrosion response than the presence of the anodic precursor. The best corrosion response was obtained for PEO_400 followed closely by A + PEO_400.

AB - The influence of current and frequency on energy consumption of plasma electrolytic oxidation (PEO) of a commercial aluminium alloy pre-treated by conventional anodizing in sulphuric acid has been investigated. The combination of a 20-μm thick precursor anodic porous film, high current (500 mA cm-2) and frequency (400 Hz) during PEO enables up to 76% energy savings compared to direct PEO treatment (50 Hz). The time needed to achieve a uniform coating thickness was also reduced from 3350 s to 750 s, for PEO_50 and A + PEO_400, respectively. The wear and corrosion performance of the optimised coatings (400 Hz) were also improved despite the lower thickness of the coatings. Such improvement was mainly attributed to the microstructural refinement associated with high frequency processing and early transaction to the "soft-sparking"regime. The modification of the frequency has a stronger influence on the corrosion response than the presence of the anodic precursor. The best corrosion response was obtained for PEO_400 followed closely by A + PEO_400.

KW - Aluminum

KW - Anodizing

KW - Plasma electrolytic oxidation

U2 - 10.1016/j.jmrt.2022.10.049

DO - 10.1016/j.jmrt.2022.10.049

M3 - Article

SN - 2238-7854

VL - 21

SP - 2061

EP - 2075

JO - Journal of Materials Research and Technology

JF - Journal of Materials Research and Technology

ER -

Energy consumption, wear and corrosion of PEO coatings on preanodized Al alloy: the influence of current and frequency

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Keywords

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