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Spray Applications
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Spray Applications

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

Deadline for manuscript submissions: closed (20 February 2023) | Viewed by 3578

Special Issue Editor

Dr. Shiladitya Paul

E-Mail Website
Guest Editor
1. TWI, Granta Park, Cambridge CB21 6AL, UK
2. Materials Innovation Centre, School of Engineering, University of Leicester, Leicester LE1 7RH, UK
Interests: corrosion; coatings; electrochemistry; thermal spraying
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The operation of numerous components in industries around the world relies on spray coatings. These coatings often allow process equipment to be purposeful in environments well beyond the operational limit of the uncoated component. Durability, ease of application, repairability, reliability, and long-term performance of such coatings are key to their application. Therefore, this Special Issue of Applied Sciences, “Spray Applications”, is devoted to research and review articles on the metallic, non-metallic, and composite spray coatings used in various environments, and all forms of spray process in Food Science, Pharmacy, Mechanical Engineering and so on.

In particular, the topic of interest includes but is not limited to:

  • Spray coatings for high-temperature and molten salt applications
  • Applications of Spray Process / Model
  • Spray coatings for mitigating corrosion in CO2 and H2S environments
  • Thermal spray and cold spray coatings for aggressive environments
  • Corrosion, wear and cavitation-resistant coatings
  • Spray coatings for mitigating marine corrosion
  • Spray coatings for deep sea applications
  • Spray coatings for nuclear applications
  • Spray coating for chemical and petrochemical plants
  • Spray coatings for aeroengine turbines
  • Spray coatings for applications in space
  • Spray coatings for oil sands and other oil and gas exploration and production environments

Dr. Shiladitya Paul
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 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 (2 papers)

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Research

15 pages, 4686 KiB  
Article
Effect of Damage on the Corrosion Performance of Thermal Spray Aluminium (TSA) Coating in Synthetic Seawater
by Shiladitya Paul
Appl. Sci. 2023, 13(2), 1109; https://doi.org/10.3390/app13021109 - 13 Jan 2023
Viewed by 1447
Abstract
A widely used coating system for corrosion mitigation of offshore steel structures is thermally sprayed aluminium (TSA). Even though these coatings have been used for decades, it is not always clear how they perform in service over long periods, particularly if damaged during [...] Read more.
A widely used coating system for corrosion mitigation of offshore steel structures is thermally sprayed aluminium (TSA). Even though these coatings have been used for decades, it is not always clear how they perform in service over long periods, particularly if damaged during installation or in service. To understand the corrosion behaviour of damaged TSA coatings in seawater and their tolerance to levels of damage, TSA coatings (1050 Al) were prepared on carbon steel substrates using wire arc spray and tested in synthetic seawater. Prior to testing, various levels of holidays or damage (~5%, 10%, 15% and 18%) reaching the steel substrate were drilled on the front surface of the coated specimens. Open circuit potential was measured and linear polarization resistance technique was used to calculate the corrosion rate. The work showed that the TSA coatings polarised steel to potentials below −800 mV (Ag/AgCl) at 25 °C, even in the presence of damage or holiday (up to ~18%). The SEM/EDX and XRD data confirmed the presence of brucite and aragonite in the damage region. The presence of damage impacted the short-term corrosion rate at the start, but did not significantly affect the overall corrosion performance of the TSA coatings in 420 days of testing. Full article
(This article belongs to the Special Issue Spray Applications)
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15 pages, 8483 KiB  
Article
Deposition of Different Metallic Coatings as Repair Materials for Concrete by Using a Twin-Wire Arc Thermal Spray Process
by Sang Youl Kim, Han-Seung Lee and Jin-Ho Park
Appl. Sci. 2022, 12(23), 11874; https://doi.org/10.3390/app122311874 - 22 Nov 2022
Cited by 1 | Viewed by 1346
Abstract
Using a concrete surface, the ingress of aggressive ions and the initiation of the corrosion reaction of an embedded steel rebar were studied. To reduce the corrosion reaction of the embedded steel rebar, either a coating on the steel rebar or a repair [...] Read more.
Using a concrete surface, the ingress of aggressive ions and the initiation of the corrosion reaction of an embedded steel rebar were studied. To reduce the corrosion reaction of the embedded steel rebar, either a coating on the steel rebar or a repair material was used on the concrete surface. Therefore, in the present study, 200 µm thick Cu, Ti, and 85Zn-15Al were used as repair materials, and their coatings were deposited on the concrete surface using a twin-wire arc thermal spray process. Different experiments such as bond adhesion, water permeability, immersion in a 5 wt.% NaCl solution, and accelerated carbonation were performed to assess the durability of the coatings, and the characterization of the coatings was performed by using scanning electron microscopy (SEM) and X-ray diffraction (XRD). The Cu and 85Zn-15Al coatings exhibited severe defects and porosity; therefore, these coatings exhibited very low bond adhesion, whereas the Ti coating showed a dense and compact morphology, and its bond adhesion value was 11 times greater than that of the Cu coating. The NaCl immersion results can be used to determine the extent of the deterioration of different coatings in coastal areas; based on these results, the Cu coating exhibited delamination, while 85Zn-15Al showed white rust deposition. By contrast, there was no detrimental effect of NaCl immersion on the Ti coating during the 28 days under study, and the coating exhibited characteristics identical to those observed after deposition. The Ti coating reduced the carbonation depth by 1.5–2 times that of the Cu and 85Zn-15Al coatings after four and eight weeks of exposure. The present study suggests that Ti can be the potential metal used as a repair material for concrete to enhance the durability of buildings and infrastructure. Full article
(This article belongs to the Special Issue Spray Applications)
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