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Journals
Coatings
Special Issues
Quality Tools in the Design of Coatings
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Quality Tools in the Design of Coatings

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

Deadline for manuscript submissions: closed (31 December 2022) | Viewed by 4612

Special Issue Editors

Prof. Dr. Robert Ulewicz

E-Mail Website
Guest Editor
Department of Production Engineering and Safety, Czestochowa University of Technology, 42-201 Czestochowa, Poland
Interests: quality assurace; desing engineering; mateials science; manufacturing engineering
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Ružica R. Nikolić

E-Mail Website
Guest Editor
Reserach Center, University of Žilina, Univerzinta 8215/1, 010 26 Žilina, Slovakia
Interests: material science (welding, hard-facing, coatings); applied mechanics (fracture mechanics, structural mechanics); quality assuarance

Special Issue Information

Dear Colleagues,

The design of coatings for special purposes in laboratory conditions, from the point of view of cognition and the development of coatings engineering, is very important. Surface morphology and surface properties are significant factors that should be considered when a desired surface finish is needed for different applications. Unfortunately, laboratory tests are very selective and often do not reflect the actual performance parameters, and they often do not provide sufficient evidence for the repeatability of results in industrial conditions. All coatings for special purposes and their improvement should be planned and confirmed with the use of quality management tools.

The scope of this Special Issue will serve as a forum for papers in the following areas:

  • Evaluation and optimization of coatings’ protective properties;
  • Design of Experiment in coatings;
  • Quality, durability and effectiveness of coatings;
  • Coating quality assessment;
  • Model of quality management of coatings;
  • Quality tools in coatings industry and/or Quality tools in the production of protective coatings;
  • Improvement of surface quality.

Prof. Dr. Robert Ulewicz
Prof. Dr. Ružica R. Nikolić
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. 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 2600 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.

Keywords

  • coatings design
  • coatings quality
  • quality tools
  • optimization
  • industrial quality of coatings

Published Papers (2 papers)

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Research

11 pages, 4295 KiB  
Article
Friction Properties of the Heat-Treated Electroless Ni Coatings Embedded with c-BN Nanoparticles
by Mara Kandeva, Mihail Zagorski, Ružica Nikolić, Blaža Stojanović, Adrian But, František Botko, Ján Piteľ and Aleksandar Vencl
Coatings 2022, 12(7), 1008; https://doi.org/10.3390/coatings12071008 - 18 Jul 2022
Cited by 4 | Viewed by 1698
Abstract
The nickel (Ni) coatings without and with embedded (5–7 vol. %) cubic boron nitride (c-BN) nanoparticles (10 nm in diameter) were deposited on carbon steel substrate by an electroless plating process. Coatings were tested in as-deposited and heat-treated (heating at 300 °C for [...] Read more.
The nickel (Ni) coatings without and with embedded (5–7 vol. %) cubic boron nitride (c-BN) nanoparticles (10 nm in diameter) were deposited on carbon steel substrate by an electroless plating process. Coatings were tested in as-deposited and heat-treated (heating at 300 °C for 6 h) conditions. Coating structure characterisation was performed, as well as hardness and roughness measurements. Friction properties were tested in dry and in water (seawater) lubricated contact conditions, with bronze as a counter-body material. Both static and kinetic coefficients of friction were measured for two different surface texture preparations (initial and working). The first surface texture simulated the running-in condition, and the second surface texture represented the steady-state conditions. The enhancement of the abrasive and erosive wear resistance of heat-treated electroless Ni coatings with embedded c-BN nanoparticles was already proved in our previous studies. This study aims to investigate those influences on friction properties of electroless Ni coatings in different sliding conditions. The results show that the coefficients of friction did not differ too much between the coatings and that the surface roughness and presence of seawater had a much stronger influence. Full article
(This article belongs to the Special Issue Quality Tools in the Design of Coatings)
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20 pages, 7889 KiB  
Article
Effect of Plasma Electrolytic Oxidation on the Short-Term Corrosion Behaviour of AZ91 Magnesium Alloy in Aggressive Chloride Environment
by Milan Štrbák, Daniel Kajánek, Vidžaja Knap, Zuzana Florková, Jana Pastorková, Branislav Hadzima and Matej Goraus
Coatings 2022, 12(5), 566; https://doi.org/10.3390/coatings12050566 - 21 Apr 2022
Cited by 15 | Viewed by 2300
Abstract
In order to increase the corrosion resistance of magnesium alloy AZ91 in corrosion environments containing chlorides, the alloy surface has been modified by plasma electrolytic oxidation (PEO). The chemical composition of electrolyte in the PEO process consisted of 12 g/L Na3PO [...] Read more.
In order to increase the corrosion resistance of magnesium alloy AZ91 in corrosion environments containing chlorides, the alloy surface has been modified by plasma electrolytic oxidation (PEO). The chemical composition of electrolyte in the PEO process consisted of 12 g/L Na3PO4·12 H2O and 1 g/L KOH, and a direct current was applied to the sample. The corrosion resistance of PEO coating and as-cast AZ91 (sample without PEO coating) was assessed using two different electrochemical methods: electrochemical impedance spectroscopy (EIS) and potentiodynamic polarisation (PDP) in 0.1 M NaCl at laboratory temperature. In addition to the electrochemical methods, the morphology of the oxidic coating was observed in the cross-sectional and top surface view by using the SEM technique. For better determination of the microstructure and PEO coating, chemical composition EDX analysis was used. The results of the experiments show that the formation of the PEO coating on AZ91 alloy has a more positive effect on the corrosion resistance in 0.1 M NaCl based on electrochemical methods than in the case of the formed coating on AZ31 alloy from the previous study. Based on electrochemical measurements in the selected environment, the formation of PEO coating on AZ91 was accompanied by a significant increase in polarisation resistance after short-term exposure compared to the as-cast surface. The EIS results showed a 73 times higher Rp value for PEO coated AZ91 when compared to the as-cast AZ91. Correspondingly, a 27 times lower icorr value was observed for PEO coated AZ91 than in the case of substrate AZ91 in 0.1 M NaCl. At the same time, the typically porous and inhomogeneous structure of the formed PEO coating on the magnesium alloy AZ91 was demonstrated. Full article
(This article belongs to the Special Issue Quality Tools in the Design of Coatings)
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