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Coatings
Special Issues
Surface Engineering for Corrosion Protection
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Surface Engineering for Corrosion Protection

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Corrosion, Wear and Erosion".

Deadline for manuscript submissions: closed (15 December 2021) | Viewed by 12231

Special Issue Editors

Prof. Dr. Edoardo Proverbio

E-Mail Website
Guest Editor
Department of Engineering, University of Messina, Contrada di Dio, 98166 Messina, Italy
Interests: corrosion; concrete; acoustic emission; materials science
Special Issues, Collections and Topics in MDPI journals
Dr. Luigi Calabrese

E-Mail Website
Guest Editor
Department of Engineering, University of Messina, Contrada Di Dio (Sant'Agata), 98166 Messina, Italy
Interests: functional materials; advanced composite materials; coatings; material corrosion and durability
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

We would like to invite you to submit your work to this Special Issue on "Surface Engineering for Corrosion Protection". Surface interaction with the environment is at the basis of the corrosion behaviour of metal alloys. Modification of the structural and chemical properties of the top layer of material surfaces is generally considered as the best way to increase corrosion resistance. Improvements in the technology and theoretical knowledge of material sciences has allowed the development of a new discipline, now commonly referred to as “Surface Engineering”. Through the proper design and modification of surface and subsurface chemistry and microstructures, a significant improvement in corrosion resistance can be obtained for advanced application and metal survival in harsh environments. This Special Issue aims to collect the latest developments in this area, with special emphasis on surface tailoring technology as well as industrial applications in corrosion protection areas. Contributions from academic research, application-oriented research, and industrial field studies are welcome.

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

  • Anodic spark oxidation;
  • Anodizing;
  • Ceramic conversion treatment;
  • Cold spray coatings;
  • Electrodeposition;
  • Electroless deposition;
  • Etching;
  • Ion implantation;
  • Laser surface treatments;
  • Physical vapor deposition;
  • Plasma electrolytic oxidation;
  • Plasma spraying;
  • Plasma-enhanced chemical vapor deposition;
  • Self-assembly;
  • Surface energy modification;
  • Surface patterning;
  • Surface texturing;
  • Thermal spray coatings.

Prof. Dr. Edoardo Proverbio
Prof. Dr. Luigi Calabrese
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

  • corrosion protection
  • surface modification
  • surface engineering
  • coatings
  • thin film
  • microstructure

Published Papers (4 papers)

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Research

15 pages, 6282 KiB  
Article
Effect of Molybdate on Corrosion Performance of Oxide Coating Produced on 7075 Al Alloy Using PEO
by Rouhollah Ghorbani, Maryam Rahmati, Keyvan Raeissi, Amin Hakimizad and Monica Santamaria
Coatings 2022, 12(2), 184; https://doi.org/10.3390/coatings12020184 - 31 Jan 2022
Cited by 3 | Viewed by 2379
Abstract
In this research, plasma electrolytic oxidation (PEO) coatings were prepared on 7075 Al alloy in a silicate-based solution with Na2MoO4 additive using a unipolar waveform at constant current density. The coatings displayed micro-pores, micro-cracks, pancake-like and crater-like features, and also [...] Read more.
In this research, plasma electrolytic oxidation (PEO) coatings were prepared on 7075 Al alloy in a silicate-based solution with Na2MoO4 additive using a unipolar waveform at constant current density. The coatings displayed micro-pores, micro-cracks, pancake-like and crater-like features, and also solidified molten oxide particles on the surface. The coatings were majorly composed of Al2O3 (γ, δ, and α), SiO2 (amorphous), and MoO3 phases, which confirms the incorporation of molybdenum in the case of additive-containing coatings. Molybdenum species were transported through cracks, channels, and micropores, as the ready access pathways into the coating and partly sealed the coating pores. The EIS technique was used to evaluate the long-term corrosion performance of the coatings up to 168 h of immersion in 3.5 wt.% NaCl solution. The results showed that the barrier action of the PEO coatings was highly enhanced by adding Na2MoO4 due to the higher resistance that alumina achieved to chlorine absorption and also its higher stability by the incorporation of MoO3. The coating formed in the presence of 5 g L−1 Na2MoO4 showed the highest thickness and the lowest porosity percent (15.15%), which provided the highest corrosion performance at long immersion times. Full article
(This article belongs to the Special Issue Surface Engineering for Corrosion Protection)
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21 pages, 10743 KiB  
Article
Addition of Organic Acids during PEO of Titanium in Alkaline Solution
by Luca Casanova, Federica Ceriani, MariaPia Pedeferri and Marco Ormellese
Coatings 2022, 12(2), 143; https://doi.org/10.3390/coatings12020143 - 25 Jan 2022
Cited by 6 | Viewed by 2233
Abstract
This research study describes recent advances in understanding the effects of the addition of organic acids, such as acetic, lactic, citric and phytic acids, on the process of plasma electrolytic oxidation (PEO) on Ti using an alkaline bath. As the plasma developed over [...] Read more.
This research study describes recent advances in understanding the effects of the addition of organic acids, such as acetic, lactic, citric and phytic acids, on the process of plasma electrolytic oxidation (PEO) on Ti using an alkaline bath. As the plasma developed over the workpiece is central to determine the particular morphological and structural features of the growing oxide, the focus is then on the inter-relationships between the electrolyte and the resultant plasma regime established. In situ optical emission spectroscopy (OES) allowed us to verify a marked plasma suppression when adding low-molecular-weight anions such as acetates, resulting in short-lived and well-distributed discharges. Conversely, when more bulky anions, such as lactates, citrates and phytates, were considered, a less efficient shielding of the electrode caused the build-up of long-lasting and destructive sparks responsible for the formation of thicker coatings, even >30 µm, at the expense of a higher roughness and loss of compactness. Corrosion resistance was tested electrochemically, according to electrochemical impedance spectroscopy (EIS), and weight losses evidenced the coatings produced in the solution containing acetates to be more suitable for service in H2SO4. Full article
(This article belongs to the Special Issue Surface Engineering for Corrosion Protection)
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13 pages, 3528 KiB  
Article
Effects of Surface Morphology on Erosion–Corrosion and Corrosion Resistance of Highly Hydrophobic Nickel-Tungsten Electrodeposited Film
by Parinaz Salehikahrizsangi, Keyvan Raeissi, Fathallah Karimzadeh, Luigi Calabrese and Edoardo Proverbio
Coatings 2021, 11(9), 1084; https://doi.org/10.3390/coatings11091084 - 07 Sep 2021
Cited by 5 | Viewed by 1924
Abstract
Hard nanocrystalline Ni-Co or Ni-W coatings are receiving a growing interest owing to their premium hardness, wear, and corrosion properties for several industrial applications. Furthermore, surface hydrophobicity greatly improves surface corrosion resistance. In this research, the durability of hydrophobic hierarchical NiW electrodeposited film [...] Read more.
Hard nanocrystalline Ni-Co or Ni-W coatings are receiving a growing interest owing to their premium hardness, wear, and corrosion properties for several industrial applications. Furthermore, surface hydrophobicity greatly improves surface corrosion resistance. In this research, the durability of hydrophobic hierarchical NiW electrodeposited film has been evaluated in a high-speed slurry erosion–corrosion (EC) test rig. Two different coatings have been tested: a rough coating obtained in a chloride-based bath (NiWchloride) and a smooth coating obtained in a sulfate-based bath (NiWsulfate). Corrosion behavior over time was evaluated by electrochemical impedance spectroscopy (EIS), while surface hydrophobic performance was determined by the sessile drop method. The morphological features of the coatings were assessed by scanning electron microscopy while roughness modification during the EC tests were identified by means of an atomic force microscopy. During static immersion in the aggressive solution, the impedance modulus of the coatings continuously increased due to an increase in the thickness of corrosion products. During the EC test, the impedance modulus of the smooth NiW coating decreased, losing its barrier property. It was observed that the increase in impedance modulus of the hierarchical structure of the rough NiW coating during EC was far greater than that during static immersion. After 64 min of EC, the NiWchloride was able to resume its hydrophobicity property by storing in air; nevertheless, the NiWsulfate, with a loss of approximately 72% in its initial contact angle, was no longer hydrophobic. The results showed improvements in the lifetime of hydrophobic NiW coatings in erosion–corrosion conditions of the hierarchical nanostructure obtained in a chloride-based electroplating bath. Full article
(This article belongs to the Special Issue Surface Engineering for Corrosion Protection)
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17 pages, 4396 KiB  
Article
Electrodeposition Based Preparation of Zn–Ni Alloy and Zn–Ni–WC Nano-Composite Coatings for Corrosion-Resistant Applications
by Channagiri Mohankumar Praveen Kumar, Avinash Lakshmikanthan, Manjunath Patel Gowdru Chandrashekarappa, Danil Yurievich Pimenov and Khaled Giasin
Coatings 2021, 11(6), 712; https://doi.org/10.3390/coatings11060712 - 13 Jun 2021
Cited by 26 | Viewed by 4511
Abstract
Zinc (Zn) is one of the five most widely consumed metals in the world. Indeed, more than 50% of all the zinc produced is used in zinc-galvanizing processes to protect steel from corrosion. Zn-based coatings have the potential for use as a corrosion-resistant [...] Read more.
Zinc (Zn) is one of the five most widely consumed metals in the world. Indeed, more than 50% of all the zinc produced is used in zinc-galvanizing processes to protect steel from corrosion. Zn-based coatings have the potential for use as a corrosion-resistant barrier, but their wider use is restricted due to the poor mechanical properties of Zn that are needed to protect steel and other metals from rusting. The addition of other alloying elements such as Ni (Nickle) and WC (Tungsten Carbide) to Zn coating can improve its performance. This study investigates, the corrosion performance of Zn–Ni coating and Zn–Ni–WC composite nanocoatings fabricated on mild steel substrate in an environmentally friendly bath solution. The influence of WC nanoparticles on Zn–Ni deposition was also investigated. The surface morphologies, texture coefficients via XRD (X-ray diffraction), SEM (Scanning Electron Microscopy), and EDS (Energy-dispersive X-ray spectroscopy) were analyzed. The electrochemical test such as polarization curves (PC) and electrochemical impedance spectroscopy (EIS) resulted in a corrosion rate of 0.6948 Å/min for Zn–Ni–WC composite nanocoating, and 1.192 Å/min for Zn–Ni coating. The results showed that the Zn–Ni–WC composite nanocoating reduced the corrosion rate by 41.71% and showed an 8.56% increase in microhardness compared to the hardness of the Zn–Ni coating. These results are augmented to better wettable characteristics of zinc, which developed good interfacial metallurgical adhesion amongst the Ni and WC elements. The results of the novel Zn–Ni–WC nanocomposite coatings achieved a great improvement of mechanical property and corrosion protection to the steel substrate surface. Full article
(This article belongs to the Special Issue Surface Engineering for Corrosion Protection)
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