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Anticorrosion Protection of Nonmetallic and Metallic Coatings II
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Anticorrosion Protection of Nonmetallic and Metallic Coatings II

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

Deadline for manuscript submissions: closed (30 September 2021) | Viewed by 15215

Special Issue Editors

Dr. Tadeja Kosec

E-Mail Website
Guest Editor
Laboratory for metals, corrosion and anticorrosion protection, Slovenian National Building and Civil Engineering Institute, Dimičeva 12, SI-1000 Ljubljana, Slovenia
Interests: electrochemistry; corrosion and corrosion protection; characterization of passive films; Raman spectroscopy; copper
Special Issues, Collections and Topics in MDPI journals
Dr. Aleksandra Kocijan

E-Mail Website
Guest Editor
Laboratory of Analytical Chemistry and Corrosion, Physics and Chemistry of Materials, Institute of Metals and Technology, Lepi pot 11, SI-1000 Ljubljana, Slovenia
Interests: electrochemistry; analytical chemistry; surface analysis; corrosion; thin coatings; biomaterials
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The scope of this Special Issue “Anticorrosion Protection of Nonmetallic and Metallic Coatings II” includes research on anticorrosion coatings of nonmetallic and metallic origin. The present additional Special Issue is a result of a succesfull first issue. The new issue has a similar focus on the improved anticorrosion properties of metallic, nonmetallic, and composite coatings using different engineering approaches to increase their durability in various demanding applications. It is highly recommended to present your research using novel approaches of defining anticorrosion properties through the use of electrochemical, spectroscopic techniques and other techniques in your research on nonmetallic and metallic coatings. Novel protection systems are highly encouraged. Submitted papers are expected to follow different aspects of processes, including physical and chemical vapor deposition, atomic layer deposition, thermal and plasma spraying, directed energy techniques, wet chemical and electrochemical processes, and techniques based on nanotechnology. The papers should provide comprehensive insight on corrosion resistance, mechanical properties, and surface/interface characterization, with emphasis on enhanced functional performance of presented anticorrosion protection for different applications.

Dr. Tadeja Kosec
Dr. Aleksandra Kocijan
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
  • Metallic coatings
  • Nonmetallic coatings
  • Electrochemical characterization
  • Spectroscopic characterization
  • Coating/metal interfaces
  • Mechanical properties

Published Papers (6 papers)

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Research

21 pages, 4457 KiB  
Article
A Synergistic Effect between Stearic Acid and (+)-α-Tocopherol as a Green Inhibitor on Ferritic Stainless Steel Corrosion Inhibition in 3.0% NaCl Solution
by Regina Fuchs-Godec
Coatings 2021, 11(8), 971; https://doi.org/10.3390/coatings11080971 - 15 Aug 2021
Cited by 3 | Viewed by 2071
Abstract
The synergistic inhibitory effect of stearic acid and (+)-α-tocopherol (E307) as a green inhibitor within a highly hydrophobic layer on the corrosion of low-carbon ferritic stainless steels was investigated in 3.0 wt% NaCl solution at 25 °C, focusing on long-term immersion tests. For [...] Read more.
The synergistic inhibitory effect of stearic acid and (+)-α-tocopherol (E307) as a green inhibitor within a highly hydrophobic layer on the corrosion of low-carbon ferritic stainless steels was investigated in 3.0 wt% NaCl solution at 25 °C, focusing on long-term immersion tests. For a broader characterisation of the surface properties, especially the modified surfaces, of the samples used, the following methods were chosen: SEM was used to investigate the surface morphologies, the water contact angle to examine the wettability, while the corrosion resistance was investigated by potentiodynamic measurements and electrochemical impedance spectroscopy. The inhibition efficiency for modified ferritic stainless steel surfaces reached more than 99% after 1 h of immersion and remained the same after 5 days immersion testing when the surfaces were modified with (SA + 2.0 wt% E307) and more than 97% with (SA + 0.5 wt% E307) under the same test conditions. Full article
(This article belongs to the Special Issue Anticorrosion Protection of Nonmetallic and Metallic Coatings II)
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12 pages, 33215 KiB  
Article
Corrosion Resistance of AISI 304 Stainless Steel Modified Both Femto- and Nanosecond Lasers
by Katarzyna M. Mroczkowska, Paulina Dzienny, Aleksander Budnicki and Arkadiusz J. Antończak
Coatings 2021, 11(5), 592; https://doi.org/10.3390/coatings11050592 - 18 May 2021
Cited by 10 | Viewed by 2825
Abstract
This article is aimed to study the effect of laser treatment of AISI 304 stainless steel on the corrosion resistance and chemical composition of the surface layer. The samples were irradiated using two quite different laser sources: IPG Yb:glass fibre laser (τ = [...] Read more.
This article is aimed to study the effect of laser treatment of AISI 304 stainless steel on the corrosion resistance and chemical composition of the surface layer. The samples were irradiated using two quite different laser sources: IPG Yb:glass fibre laser (τ = 230 ns, λ = 1062 nm) and Trumpf TruMicro Series 2020 fiber laser (τ = 260 fs–20 ps, λ = 1030 nm) that is, in both the long and ultra-short pulse duration regime. It allowed the observation of completely different microstructures and chemical composition of the surface layer. In this study, the morphology of the samples was accessed using both Keyence digital microscope and Olympus Lext 5000 profilometer. The corrosion resistance was examined in 3% NaCl solution using both potentiodynamic measurement and Electrochemical Impedance Spectroscopy. In order to examine the change in chemical composition of the surface layer, the X-ray photoelectron spectroscopy study was performed. Results show that the use of a long laser pulse contributes to the formation of a thin, tight, rich in chromium passive layer, which significantly improves corrosion resistance in comparison to the reference sample. Different behaviour is observed after irradiation with an ultra-short pulse duration laser. Full article
(This article belongs to the Special Issue Anticorrosion Protection of Nonmetallic and Metallic Coatings II)
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Graphical abstract

12 pages, 3344 KiB  
Article
Ultrasonic Treatment Induced Fluoride Conversion Coating without Pores for High Corrosion Resistance of Mg Alloy
by Sheng Li, Laihua Yi, Xiongxiang Zhu and Tongfang Liu
Coatings 2020, 10(10), 996; https://doi.org/10.3390/coatings10100996 - 19 Oct 2020
Cited by 8 | Viewed by 2333
Abstract
Fluoride conversion (MgF2) coating with facile preparation and good adhesion is promising to protect Mg alloy, but defects of pores in the coating lead to limited corrosion resistance. In this study, a compact and dense MgF2 coating was prepared by [...] Read more.
Fluoride conversion (MgF2) coating with facile preparation and good adhesion is promising to protect Mg alloy, but defects of pores in the coating lead to limited corrosion resistance. In this study, a compact and dense MgF2 coating was prepared by the combination of fluoride treatment and ultrasonic treatment. The ultrasonically treated MgF2 coating showed a compact and dense structure without pores at the frequency of 28 kHz. The chemical compositions of the coating were mainly composed of F and Mg elements. The corrosion potential of the ultrasonically treated Mg alloy shifted towards the noble direction in the electrochemical tests. The corrosion current density decreased due to the protectiveness of MgF2 coating without defects of pores or cracks. During immersion tests for 24 h, the ultrasonically treated Mg alloy exhibited the lowest H2 evolution (0.32 mL/cm2) and pH value (7.3), which confirmed the enhanced anti-corrosion ability of MgF2 coating. Hence, the ultrasonically treated fluoride coating had great potentials for their use in anti-corrosion applications of Mg alloy. Full article
(This article belongs to the Special Issue Anticorrosion Protection of Nonmetallic and Metallic Coatings II)
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18 pages, 6539 KiB  
Article
Influence of Element Penetration Region on Adhesion and Corrosion Performance of Ni-Base Coatings
by Xiuqing Fu, Zhenyu Shen, Xinxin Chen, Jinran Lin and Hongbing Cao
Coatings 2020, 10(9), 895; https://doi.org/10.3390/coatings10090895 - 18 Sep 2020
Cited by 5 | Viewed by 2261
Abstract
In this study, Ni–P/Ni–P–SiC coatings were prepared on pretreated 45 steel substrates by scanning electrodeposition. Prior to the electrodeposition, the substrates were subjected to two types of pretreatments: polishing and sandblasting. The 3D morphology of the pretreated substrates was characterized by laser scanning [...] Read more.
In this study, Ni–P/Ni–P–SiC coatings were prepared on pretreated 45 steel substrates by scanning electrodeposition. Prior to the electrodeposition, the substrates were subjected to two types of pretreatments: polishing and sandblasting. The 3D morphology of the pretreated substrates was characterized by laser scanning confocal microscopy. The micromorphology and section morphology of the coating surface were characterized by field emission scanning electron microscopy. The section element composition was characterized using an EDS energy spectrum analyzer. The adhesion and corrosion resistance of 15 coatings were analyzed using an automatic scratch tester and CS350 electrochemical workstation. The results showed the presence of an element penetration region between the coating and the substrate. The sandblasting pretreatment and SiC nanoparticle addition helped widen the penetration region of the elements. The Ni–P–SiC coating prepared by scanning electrodeposition on the sandblasted substrate exhibited the thickest penetration region, up to 28.39 µm. A scratch test conducted on this coating showed that it exhibits the best adhesion force, up to 36.5 N. In electrochemical corrosion experiments, its corrosion potential was found to be the highest, reaching −0.30 V, and the corrosion current density was the lowest, reaching 8.45 × 10−7 A·cm−2. The presence of the element penetration region increased the coating adhesion and improved the corrosion resistance. Full article
(This article belongs to the Special Issue Anticorrosion Protection of Nonmetallic and Metallic Coatings II)
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12 pages, 5983 KiB  
Article
Corrosion Resistance of Al/SiC Laser Cladding Coatings on AA6082
by Ainhoa Riquelme, Pilar Rodrigo, María Dolores Escalera-Rodríguez and Joaquín Rams
Coatings 2020, 10(7), 673; https://doi.org/10.3390/coatings10070673 - 14 Jul 2020
Cited by 10 | Viewed by 2838
Abstract
Aluminum matrix composites reinforced with silicon carbide particles (SiCp) were deposited by laser cladding on AA6082 aluminum alloy. Different compositions of the matrix of the composites coating were used and different amounts of Si and Ti were added to a base [...] Read more.
Aluminum matrix composites reinforced with silicon carbide particles (SiCp) were deposited by laser cladding on AA6082 aluminum alloy. Different compositions of the matrix of the composites coating were used and different amounts of Si and Ti were added to a base of Al-12Si in order to control the reactivity between molten aluminum and SiCp during laser cladding. The corrosion behavior of the coatings deposited was evaluated in 3.5 wt.% NaCl solution using gravimetric analyses and electrochemical polarization tests. The corrosion products observed were Al(OH)3 and Al2O3, and they formed a layer that limited the evolution of corrosion. However, the presence of discontinuities in it reduced the corrosion resistance of the coating. The corrosion mechanisms were different depending on the coating composition. The addiction of Ti to the alloy allowed for better corrosion behavior for the composite coating than that of the aluminum substrate. Full article
(This article belongs to the Special Issue Anticorrosion Protection of Nonmetallic and Metallic Coatings II)
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10 pages, 2869 KiB  
Article
The Improvement of Hardness and Corrosion Resistance of Electroplated Pd-Ni Film on 316L Stainless Steel by CeCl3
by Guangxin Wang, Dongdong Li, Yu Zuo, Yuming Tang, Xiaofeng Zhang and Xuhui Zhao
Coatings 2020, 10(2), 161; https://doi.org/10.3390/coatings10020161 - 10 Feb 2020
Cited by 11 | Viewed by 2169
Abstract
By using the methods of XRD, SEM/EDS, electrochemical polarization, and a weight loss test, the effects of the rare earth salt CeCl3 on the adherence, hardness, porosity and corrosion resistance of an electroplated Pd-Ni film on 316L stainless steel were studied. The [...] Read more.
By using the methods of XRD, SEM/EDS, electrochemical polarization, and a weight loss test, the effects of the rare earth salt CeCl3 on the adherence, hardness, porosity and corrosion resistance of an electroplated Pd-Ni film on 316L stainless steel were studied. The results showed that by adding 1.0 g L−1 CeCl3 in the plating bath, the obtained Pd-Ni film was obviously improved. The grain size was refined, and the microstructure was more compact and uniform. The film hardness and the adherence to the substrate increased, and the corrosion resistance in a 20 wt % H2SO4 solution (80 °C) obviously increased. Ce3+ increased the throwing power of the bath, which resulted in more uniform current distribution and strengthened the cathodic polarization degree during the electroplating process. Full article
(This article belongs to the Special Issue Anticorrosion Protection of Nonmetallic and Metallic Coatings II)
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