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Applied Sciences
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Sustainable Surface Engineering for Functional Applications: Anti-corrosion and Tribological Systems,...
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Sustainable Surface Engineering for Functional Applications: Anti-corrosion and Tribological Systems, Responsive Interfaces, and Biomedical Devices

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Chemical and Molecular Sciences".

Deadline for manuscript submissions: closed (30 September 2022) | Viewed by 10217

Special Issue Editors

Prof. Dr. João Tedim

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Guest Editor
CICECO-Aveiro Institute of Materials, Department of Materials and Ceramic Engineering, University of Aveiro, Aveiro, Portugal
Interests: corrosion science; functional coatings
Prof. Dr. Mário Ferreira

E-Mail Website
Guest Editor
Department of Materials and Ceramic Engineering, CICECO-Aveiro Institute of Materials, University of Aveiro, Campus University of Santiago, 3810-193 Aveiro, Portugal
Interests: carbon materials; composites; functional coatings

Special Issue Information

Dear Colleagues,

Surface engineering has been generally defined as an enabling technology that encompasses the optimization of surface properties, development and characterization of coatings and modified surfaces. Being an important area of research and development, surface engineering has a multidisciplinary scope with extended branches from chemistry, materials, physics, and biology to mechanical and biomedical engineering, among others. This area is of interest to a myriad of industry sectors, such as mobility/transportation, metallurgy, and health, where new materials and surface technology solutions with environmentally friendly production methods are compelling.


Technology development thus far includes design, synthesis and characterization of corrosion and wear-resistant coatings, room and high-temperature low friction and self-lubricating coatings, antimicrobial surfaces, smart coatings, anti-sticking coatings, etc. Computational material simulation tools, ranging from the atomistic to the mesoscopic and macroscopic level simulations used for the deposition processes, as well as to predict the effect of nanostructured features on material properties and surface functionality, are also of paramount importance.

This Special Issue is designed precisely to cover recent developments in these areas, as applied to any of the foregoing (or related) fields. Research articles, short communications or reviews exemplifying any of those developments would be very welcome.

Prof. Dr. João Tedim
Prof. Dr. Mário Ferreira
Guest Editors

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 submissions that pass pre-check are 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. Applied Sciences is an international peer-reviewed open access semimonthly 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 2400 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 (4 papers)

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Research

11 pages, 2695 KiB  
Article
Tannic Acid-Loaded Hydroxyapatite Carriers for Corrosion Protection of Polyolefin-Coated Carbon Steel
by Roma Raj, Ramazan Kahraman, Abdul Shakoor, Fatima Montemor and Maryna Taryba
Appl. Sci. 2022, 12(20), 10263; https://doi.org/10.3390/app122010263 - 12 Oct 2022
Cited by 1 | Viewed by 1781
Abstract
In this study, pH-sensitive hydroxyapatite particles loaded with tannic acid were incorporated in polyolefin-based coatings for the corrosion protection of carbon steel. Transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and thermogravimetric analysis (TGA) were used to characterize the [...] Read more.
In this study, pH-sensitive hydroxyapatite particles loaded with tannic acid were incorporated in polyolefin-based coatings for the corrosion protection of carbon steel. Transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and thermogravimetric analysis (TGA) were used to characterize the hydroxyapatite particles loaded with tannic acid (Tannic-HAP). Electrochemical impedance spectroscopy (EIS) was employed to study the protective performance of the reference and modified polyolefin coatings. The results suggest that modified coatings showed improved corrosion performance compared to the unmodified coatings. The combination of tannic acid and hydroxyapatite contributed to a more effective protection of coated carbon steel. Full article
(This article belongs to the Special Issue Sustainable Surface Engineering for Functional Applications: Anti-corrosion and Tribological Systems, Responsive Interfaces, and Biomedical Devices)
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15 pages, 3519 KiB  
Article
Influence of the Operating Conditions on the Release of Corrosion Inhibitors from Spray-Dried Carboxymethylcellulose Microspheres
by Francyelle Calegari, Isabel Sousa, Mário G. S. Ferreira, Marcos A. C. Berton, Cláudia E. B. Marino and João Tedim
Appl. Sci. 2022, 12(4), 1800; https://doi.org/10.3390/app12041800 - 09 Feb 2022
Cited by 3 | Viewed by 2103
Abstract
Sodium carboxymethylcellulose (CMC-Na) microparticles, containing corrosion inhibitor benzotriazole (BTA), were prepared using different spray drying processing parameters, with the purpose of future application in protective coatings for the delivery of corrosion inhibitors. The effects of the processing parameters, such as inlet temperature and [...] Read more.
Sodium carboxymethylcellulose (CMC-Na) microparticles, containing corrosion inhibitor benzotriazole (BTA), were prepared using different spray drying processing parameters, with the purpose of future application in protective coatings for the delivery of corrosion inhibitors. The effects of the processing parameters, such as inlet temperature and spray flow rate, are discussed herein. The biopolymeric CMC-Na microparticles obtained were characterized morphologically by SEM and TEM, and their release profile studied by UV-Vis. The results show that the prepared microparticles (microspheres) were homogeneous, spherically shaped and of a matrix-type nature. Additionally, it was observed that the inlet temperature and spray flow rate significantly influenced the release profiles and process yields. From the different process parameters tested, it was found that the best conditions to achieve higher process yields, higher encapsulation efficiencies and better release properties, were an inlet temperature of 170 °C, a pump rate of 2.5 mL/min, and a drying air-flow rate of 440 L/h. Full article
(This article belongs to the Special Issue Sustainable Surface Engineering for Functional Applications: Anti-corrosion and Tribological Systems, Responsive Interfaces, and Biomedical Devices)
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11 pages, 1938 KiB  
Article
Advanced Tribological Characterization of DLC Coatings Produced by Ne-HiPIMS for the Application on the Piston Rings of Internal Combustion Engines
by Alireza Vahidi, Diogo Fonseca, João Oliveira, Albano Cavaleiro, Amílcar Ramalho and Fábio Ferreira
Appl. Sci. 2021, 11(21), 10498; https://doi.org/10.3390/app112110498 - 08 Nov 2021
Cited by 12 | Viewed by 2871
Abstract
Piston rings (PR) are known for almost a quarter of the friction losses in internal combustion engines. This research work aims to improve the tribological performance of PR by a recently developed variant of Diamond-like Carbon (DLC) coatings deposited in a mixture of [...] Read more.
Piston rings (PR) are known for almost a quarter of the friction losses in internal combustion engines. This research work aims to improve the tribological performance of PR by a recently developed variant of Diamond-like Carbon (DLC) coatings deposited in a mixture of Ar and Ne plasma atmosphere (Ne-DLC) by high-power impulse magnetron sputtering (HiPIMS). For the benchmark, the widely used Chromium Nitride (CrN) and DLCs deposited in pure Ar plasma atmosphere (Ar-DLC) were used. The tribological tests were performed on a block-on-ring configuration under different lubrication regimes by varying temperatures and sliding speeds. The analysis of the results was performed by Stribeck curves corresponding to each sample. An improvement of the tribological performance was observed for Ne-DLC films by up to 22.8% reduction in COF compared to CrN in the boundary lubrication regime, whereas, for the Ar-DLC film, this reduction was only 9.5%. Moreover, the Ne-DLC films achieved ultralow friction of less than 0.001 during the transition to a hydrodynamic lubrication regime due to better wettability (lower contact angle) and higher surface free energy. Increasing the Ne up to 50% in the discharge gas also leads to an increase of hardness of DLC films from 19 to 24 GPa. Full article
(This article belongs to the Special Issue Sustainable Surface Engineering for Functional Applications: Anti-corrosion and Tribological Systems, Responsive Interfaces, and Biomedical Devices)
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16 pages, 6813 KiB  
Article
Insight into the Role of Cerium (III) Addition to a MgAl-LDH Coating on AA6082
by Michele Fedel and Michele Zampiccoli
Appl. Sci. 2021, 11(17), 8252; https://doi.org/10.3390/app11178252 - 06 Sep 2021
Cited by 7 | Viewed by 2564
Abstract
In this work, Ce doped MgAl-LDHs layers have been developed through an in-situ synthesis method on 6082 aluminum surface. The aim was to gain mechanistic insight into the role of Ce(III) as an active corrosion inhibitor embedded in the LDHs layer. The development [...] Read more.
In this work, Ce doped MgAl-LDHs layers have been developed through an in-situ synthesis method on 6082 aluminum surface. The aim was to gain mechanistic insight into the role of Ce(III) as an active corrosion inhibitor embedded in the LDHs layer. The development of the LDH structure was verified by checking the presence of the characteristic XRD peaks, the platelet morphology (evaluated by SEM-EDXS) and the functional groups (by FTIR-ATR analyses). The same techniques were employed to assess the effect of a prolonged immersion time in 0.1 NaCl on the Ce doped MgAl-LDH coatings. Electrochemical impedance spectroscopy (EIS) was employed to monitor the evolution of the electrochemical properties of the coatings during prolonged immersion in saline solutions. The findings suggest a crystallization/dissolution/precipitation mechanism which implies: (i) the formation of crystalline cerium compounds, such as Ce(OH)3, in the LDH structure during the synthesis; (ii) the dissolution upon exposure to the NaCl solution, thus leading to cerium ions release; (iii) the precipitation of amorphous Ce oxides/hydroxides at the cathodic sites when the metal starts to corrode; (iv), the consequent mitigation of the electrochemical activity of the metal and, thus, the reduction of the extent of corrosion. Full article
(This article belongs to the Special Issue Sustainable Surface Engineering for Functional Applications: Anti-corrosion and Tribological Systems, Responsive Interfaces, and Biomedical Devices)
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