Surface properties of plasma electrolytic oxidation coating modified by polymeric materials: A review

Zehra, Tehseen; Fattah‐alhosseini, Arash; Kaseem, Mosab

doi:10.1016/j.porgcoat.2022.107053

Cited by 31 publications

(20 citation statements)

References 125 publications

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“…Pezatto et al [ 23 ] used PEO-coating on 7020 AA and AZ80 alloys as a pre-treatment for sol-gel formation. The authors in the recent review summarized the studies that dealt with the formation, features, and application of the PEO-coating modified with different types of polymers [ 24 ]. As a result of the abovementioned surface treatment, composite coatings (CC) with two-factor protection were obtained.…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Smart PEO-Coatings Impregnated with Corrosion Inhibitors on the Protective Properties of AlMg3 Aluminum Alloy

et al. 2023

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The protective coating with a self-organized microtubular structure was formed using plasma electrolytic oxidation (PEO) on AlMg3 aluminum alloy in the tartrate-fluoride electrolyte. This protective layer was further modified using corrosion inhibitors of the azole group (1,2,4-triazole, benzotriazole) and polymer material (polyvinilidene fluoride, PVDF). X-ray diffraction analysis and scanning electron microscopy with energy dispersive spectroscopy were used to study the morphology and composition of the obtained oxide coatings. The presence of the inhibitor in the PEO-layer was confirmed using micro-Raman spectroscopy and X-ray photoelectron spectroscopy. The level of corrosion protection of formed coatings as well as the effect of loaded inhibitors on the anticorrosion efficiency was evaluated using electrochemical impedance spectroscopy (EIS) and localized scanning techniques (SVET/SIET). The coating impregnation with corrosion inhibitors of the azole group significantly improves the corrosion characteristics of the material. Impregnation of the base PEO-layer with 1,2,4-triazole during 24 h results in a 36 times increase in the impedance modulus measured at the lowest frequency (|Z|f=0.1Hz). Additional sealing of impregnated coating with polymer improves the corrosion stability of the treated material. On the base of the obtained data, the optimal way of protective inhibitor- and polymer-containing formation using surface treatment was suggested. The best barrier properties were established for hybrid coatings obtained by the immersion of a PEO-coated sample in 1,2,4-triazole solution for 24 h and following spraying the PVDF solution. The value of |Z|f=0.1Hz for this protective layer increased by more than two orders of magnitude in comparison with the base PEO-layer. The three-stage mechanism of corrosion inhibition of the sample with smart inhibitor-containing coating was established.

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Section: Introductionmentioning

confidence: 99%

“…As a result of the abovementioned surface treatment, composite coatings (CC) with two-factor protection were obtained. The formation of such coatings, which reduce the corrosion rate of metals and alloys, has been widely studied in the last decade [ 24 , 25 , 26 ].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Smart PEO-Coatings Impregnated with Corrosion Inhibitors on the Protective Properties of AlMg3 Aluminum Alloy

et al. 2023

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“…The main method for protecting metals, including aluminum, is the formation of coatings on the surface of a part or product. One of the promising ways to form such protective coatings is plasma electrolytic oxidation (PEO) [ 8 , 9 , 10 , 11 ]. The coatings obtained using PEO have highly protective and wear-resistant properties, high adhesion to the metal substrate, as well as a developed surface with pores; this makes it possible to modify such coatings (by incorporating the various components into the pores) with different materials, depending on the purpose of future use [ 10 , 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

“…One of the promising ways to form such protective coatings is plasma electrolytic oxidation (PEO) [ 8 , 9 , 10 , 11 ]. The coatings obtained using PEO have highly protective and wear-resistant properties, high adhesion to the metal substrate, as well as a developed surface with pores; this makes it possible to modify such coatings (by incorporating the various components into the pores) with different materials, depending on the purpose of future use [ 10 , 11 , 12 ]. The purpose of this work is to modify such coatings previously formed on AMg3 alloy by introducing superdispersed polytetrafluoroethylene (SPTFE) into their structure using a spray-coating method.…”

Section: Introductionmentioning

confidence: 99%

Composite Coatings of AMg3 Alloy Formed by a Combination of Plasma Electrolytic Oxidation and Fluoropolymer Spraying

et al. 2023

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This paper presents the results of an investigation of the changes in the corrosion, wear resistance, and wettability of composite coatings formed on the AMg3 alloy through plasma electrolytic oxidation (PEO) and subsequent spraying with an organofluorine polymer. The evaluation of the electrochemical properties of the composite layers revealed a decrease in the corrosion current density compared with the PEO coating (from 3.8 × 10−8 to 3.1 × 10−11 A/cm2). The analysis of the wear resistance of composite coatings established that the application of this type of coating reduced the wear of the samples by two orders of magnitude when compared with the PEO layer. Using the contact-angle measurement, it was found that with an increase in the number of polymer spray applications, the wettability of coatings decreased, so the contact angle for the composite coating with triple fluoropolymer application increased by 134.3° compared to the base PEO coating.

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“…The weight saving potential of Mg alloys can lead to a reduction in energy consumption and greenhouse gas emissions. It is the lightest structural metal, with a density of 1.7 g/cc which is 33% and 75% lower than aluminum and steel, respectively [5]. Mg alloys are very high in galvanic activity and tend to corrode aggressively in aqueous environment.…”

Section: Introductionmentioning

confidence: 99%

Complex coating system for improving corrosion resistance of AZ31 magnesium alloy

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Iesalniece

Šteins

et al. 2023

J. Phys.: Conf. Ser.

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Complex coating for corrosion protection was developed on magnesium alloy AZ31 using plasma electrolytic oxidation (PEO), spray pyrolysis (SP) and two-part paint. PEO coatings were obtained using electrolyte with phosphate modifier. The oxide layer formed via PEO was sealed using pyrolyzed TiO2 and finally coated with spray primer-paint system to further protect the surface. The specimens were tested for corrosion using immersion gravimetric method in 3% NaCl solution for 1 week and mass loss was recorded. Morphology of the PEO and SP coatings were studied using SEM and chemical analysis of SP coating by EDS. It was found that 30 minutes of spray time in SP process caused surface cracks in the coating. Paint was applied in varying numbers of primer and paint layers and 2 layers each produced the best results in terms of corrosion resistance.

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Surface properties of plasma electrolytic oxidation coating modified by polymeric materials: A review

Cited by 31 publications

References 125 publications

The Effect of Smart PEO-Coatings Impregnated with Corrosion Inhibitors on the Protective Properties of AlMg3 Aluminum Alloy

The Effect of Smart PEO-Coatings Impregnated with Corrosion Inhibitors on the Protective Properties of AlMg3 Aluminum Alloy

Composite Coatings of AMg3 Alloy Formed by a Combination of Plasma Electrolytic Oxidation and Fluoropolymer Spraying

Complex coating system for improving corrosion resistance of AZ31 magnesium alloy

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