Increasing the application fields of magnesium by ultraceramic®: Corrosion and wear protection by plasma electrolytical oxidation (PEO) of Mg alloys

Buling, Anna; Zerrer, Joerg

doi:10.1016/j.surfcoat.2019.04.025

Cited by 54 publications

(20 citation statements)

References 53 publications

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“…The formation of oxide films on magnesium (equation (2) and (3)) is due to the outward diffusion of magnesium ions and inward diffusion of OHunder high potentials [36]. The film formation reactions would occur once the concentrations of these ions in the electrode/electrolyte interface reach a critical value.…”

Section: Methodsmentioning

confidence: 99%

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Corrosion resistance of PEO and primer coatings on magnesium alloy

Ostapiuk

2020

Journal of Asian Ceramic Societies

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Section: Methodsmentioning

confidence: 99%

“…Many different applications are used to perform surface treatments and coating processes to prevent corrosion [2]. Several attempts have been made in order to improve the corrosion resistance of Mg alloys.…”

Section: Introductionmentioning

confidence: 99%

Corrosion resistance of PEO and primer coatings on magnesium alloy

Ostapiuk

2020

Journal of Asian Ceramic Societies

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“…The PEO process was carried out in bipolar current mode, whereas the Al sample performed as an anode, and stainless steel was used as a cathode. Under the controlled temperature of 25°C, the PEO process was performed using the regime described elsewhere (Buling and Zerrer, 2019). The thickness of the achieved PEO layers was approximately 25 μm (see Table 2).…”

Section: Methodsmentioning

confidence: 99%

Advanced Corrosion Protection of Additive Manufactured Light Metals by Creating Ceramic SurfaceThrough CERANOD® Plasma Electrolytical Oxidation Process

Jantimapornkij¹,

Zerrer²,

Buling³

2021

Front. Chem. Eng.

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Lightweight structures produced by additive manufacturing (AM) technology such as the selective laser melting (SLM) process enable the fabrication of 3D structures with a high degree of freedom. A printed component can be tailored to have specific properties and render possible applications for industries such as the aerospace and automotive industries. Here, AlSi10Mg is one of the alloys that is currently used for SLM processes. Although the research with the aim improving the strength of AM aluminum alloy components is rapidly progressing, corrosion protection is scarcely addressed in this field. Plasma electrolytic oxidation (PEO) is an advanced electrolytical process for surface treatment of light metals such as aluminum, magnesium, and titanium. This process produces an oxide ceramic-like layer, which is extremely hard but also ductile, and significantly improves the corrosion and wear behavior. The aim of this study is to understand the corrosion behavior of 3D-printed AlSi10Mg alloy and to improve its corrosion resistance. For this reason, the properties of CERANOD®—PEO coating on an AlSi10Mg alloy produced by SLM were investigated on different AM surfaces, i.e., as-built, polished and stress relieved specimens. The corrosion performance of these surfaces was analyzed using electrochemical impedance spectroscopy (EIS), potentiodynamic polarization, and long-term immersion tests. Moreover, the microstructure and morphology of the resulting coatings were characterized by SEM/EDS, taking into account the corrosive attacks. The results exhibited a high amount of localized corrosion in the case of the uncoated specimens, while the PEO process conducted on the aluminum AM surfaces led to enclosed homogeneous coatings by protecting the material’s pores, which are typically observed in AM process. Thereby, high corrosion protection could be achieved using PEO surfaces, suggesting that this technology is a promising candidate for unleashing the full potential of 3D light metal printing.

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“…Their weight saving potential exceeds 50 % for some components, which leads to an increased usage of Mg alloys in the industrial fields in the last few years. Specifically, substituting other materials for Mg alloys in automotive and aircraft industry, leads to reduction in fuel and CO 2 emission, being a very actual topic [1][2]. Apart from extensive use in automotive industry, Mg-based alloys are utilized in production of parts for computers and other portable devices, aircraft, military, recreational and orthopaedic equipment, diving gear and sports goods [3][4].…”

Section: Introductionmentioning

confidence: 99%

Corrosion Behaviour of Preserved PEO Coating on AZ31 Magnesium Alloy

Pastorek¹,

Štrbák²,

Kajánek³

et al. 2021

Communications

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A surface treatment process, composed of plasma electrolytic oxidation (PEO) and sealing by temporary oil preservation system containing corrosion inhibitors, was performed on AZ31 magnesium alloy in order to improve its corrosion resistance in environments containing chlorides. Both atmospheric and immersion conditions were evaluated by electrochemical tests in 0.1M NaCl solution together with salt spray test according to STN EN ISO 9227 standard. The obtained results confirmed significant improvement of corrosion resistance reached by the PEO sealing in aggressive environments compared to the pure PEO coating on AZ31 surface. Hence, such a duplex coating is a very perspective alternative for magnesium alloy applications in severe conditions or for temporary protection of magnesium products coated by the PEO during marine transport.

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Increasing the application fields of magnesium by ultraceramic®: Corrosion and wear protection by plasma electrolytical oxidation (PEO) of Mg alloys

Cited by 54 publications

References 53 publications

Corrosion resistance of PEO and primer coatings on magnesium alloy

Corrosion resistance of PEO and primer coatings on magnesium alloy

Advanced Corrosion Protection of Additive Manufactured Light Metals by Creating Ceramic SurfaceThrough CERANOD® Plasma Electrolytical Oxidation Process

Corrosion Behaviour of Preserved PEO Coating on AZ31 Magnesium Alloy

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