Special Issue "Surface Engineering of Light Alloys"

A special issue of Coatings (ISSN 2079-6412).

Deadline for manuscript submissions: 25 July 2019

Special Issue Editor

Guest Editor
Dr. Sara Ferraris

Department of Applied Science and Technology, Politecnico di Torino, Torino, Italy
Website | E-Mail
Interests: metals; biomaterials; titanium; surface treatments; interfaces; surface characterizations

Special Issue Information

Dear Colleagues,

It is my pleasure to announce you the Special Issue of Coatings dedicated to "Surface Engineering of Light Alloys" and invite you to submit your valuable contribution.

Light alloys (aluminum, magnesium, and titanium alloys) are gaining increasing interest in the scientific and technological community, in many different application fields from automotive to medicine, thanks to their light weight coupled with interesting mechanical properties. The functional performances of light alloys can be significantly affected by their surface properties; in fact, the surface can be considered as the “visiting card” of the material for its working environment (e.g., it can drive the biological response upon implantation for titanium alloys intended for biomedical implants or it can affect the joining ability of aluminum and magnesium alloys) as well as for its further material working steps (e.g., coatings). Surface engineering is a versatile tool for the modification of materials surface in order to tailor and improve their functional properties.

The aim the present Special Issue is to present the latest development in this field through research and review papers.

In particular, the topics of interest include, but are not limited to:

  • Surface engineering of light alloys for biomedical applications;
  • Surface engineering of light alloys for joining and coatings applications;
  • Surface engineering of light alloys for corrosion protection;
  • Surface engineering of light alloys for antibacterial/antifouling purposes.

Dr. Sara Ferraris
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Coatings is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Published Papers (2 papers)

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Research

Open AccessFeature PaperArticle
Grafting of Gallic Acid onto a Bioactive Ti6Al4V Alloy: A Physico-Chemical Characterization
Coatings 2019, 9(5), 302; https://doi.org/10.3390/coatings9050302
Received: 2 April 2019 / Revised: 24 April 2019 / Accepted: 25 April 2019 / Published: 3 May 2019
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Abstract
Despite increasing interest in the use of natural biomolecules for different applications, few attempts of coupling them to inorganic biomaterials are reported in literature. Functionalization of metal implants with natural biomolecules could allow a local action, overcoming the issue of low bioavailability through [...] Read more.
Despite increasing interest in the use of natural biomolecules for different applications, few attempts of coupling them to inorganic biomaterials are reported in literature. Functionalization of metal implants with natural biomolecules could allow a local action, overcoming the issue of low bioavailability through systemic administration. In the present work, gallic acid was grafted to a pre-treated Ti6Al4V in order to improve its biological response in bone contact applications. The grafting procedure was optimized by choosing the concentration of gallic acid (1 mg/mL) and the solvent of the solution, which was used as a source for functionalization, in order to maximize the amount of the grafted molecule on the titanium substrate. The functionalized surfaces were characterized. The results showed that functionalization with Simulated Body Fluid (SBF) as solvent medium was the most effective in terms of the amount and activity of the grafted biomolecule. A key role of calcium ions in the grafting mechanism is suggested, involving the formation of coordination compounds formed by way of gallic acid carboxylate and Ti–O as oxygenated donor groups. Bioactive behavior and surface charge of the pre-treated Ti6Al4V surface were conserved after functionalization. The functionalized surface exposed a greater amount of OH groups and showed higher wettability. Full article
(This article belongs to the Special Issue Surface Engineering of Light Alloys)
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Graphical abstract

Open AccessArticle
Hydrothermal Synthesis of Protective Coating on Mg Alloy for Degradable Implant Applications
Coatings 2019, 9(3), 160; https://doi.org/10.3390/coatings9030160
Received: 26 January 2019 / Revised: 21 February 2019 / Accepted: 26 February 2019 / Published: 28 February 2019
Cited by 1 | PDF Full-text (3398 KB) | HTML Full-text | XML Full-text
Abstract
Biodegradable magnesium (Mg) alloys are known as “the new generation of biomedical metal materials”. However, high degradation rates restrict their clinical application. To overcome this issue, a new and simple method for producing of protective coating based on hydrothermal synthesis at 200 °C [...] Read more.
Biodegradable magnesium (Mg) alloys are known as “the new generation of biomedical metal materials”. However, high degradation rates restrict their clinical application. To overcome this issue, a new and simple method for producing of protective coating based on hydrothermal synthesis at 200 °C in 0.5 M NaHCO3 was elaborated. The microstructure, elemental and phase composition of the produced films were examined by scanning electron microscope (SEM), X-ray energy-dispersive spectrometer (EDS) and X-ray diffraction (XRD). The mechanical strength of the protective coating was evaluated by grid scribing method. The corrosion protection effect was evaluated using linear sweep voltammogram (LSV) and electrochemical impedance spectroscopy (EIS) methods in the simulated body fluid (SBF). Since the corrosion process is accompanied by stoichiometric evolution of hydrogen, the amount of the latter was measured to quantify the overall corrosion rate. Both the coatings morphology and phase composition were sensitive to the treatment duration. The coating formed after 0.5 h was loose and mainly consisted of spherical flower-like Mg5(CO3)4(OH)2·4H2O accompanied by small amounts of Mg(OH)2. The treatment duration of 3 h resulted in a thicker compact coating composed mainly of irregular granular MgCO3 as well as Mg(OH)2. The coating providing the most effective protection and uniform corrosion was achieved by 2 h treatment at 200 °C. Full article
(This article belongs to the Special Issue Surface Engineering of Light Alloys)
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Figure 1

Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

Authors: Sara Ferraris, Graziano Ubertalli
Title: Surface activation and charcaterization of aluminum alloys for brazing optimization

Authors: Seiji Yamaguchi, et al.
Title: Tri-functional calcium titanate coating on titanium metal by chemical and heat treatment

Authors: A. Ghanbari, F. Warchomicka, C. Sommitsch, A. Zamanian
Title: Investigation of oxidation mechanism of dopamine functionalizing on magnesium alloy for biomedical application

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