Corrosion protection properties of different inhibitors containing PEO/LDHs composite coating on magnesium alloy AZ31

Zhang, Gen; Jiang, Er; Wu, Liang; Ma, Weigang; Yang, Hong; Tang, Aitao; Pan, Fusheng

doi:10.1038/s41598-021-81029-6

Cited by 30 publications

(12 citation statements)

References 80 publications

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“…Therefore, it is crucial to preliminarily investigate the interaction of an effective corrosion inhibitor with both a bare and PEO layer to foresee its potential adverse effects on the overall corrosion protection performance of the system. Such adverse effects of 2,5PDC have also been reflected in another recent report [ 260 ].…”

Section: Combining Inhibitors With Other Corrosion Protection Strategiessupporting

confidence: 60%

“…Prolonging immersion time and increasing the number of successive immersions can increase the amount of inhibitor loaded inside the pores. However, excessive exposure of PEO film to the aqueous solution has been reported to have an adverse effect on the corrosion protection of the PEO coating [ 159 , 256 , 259 , 260 ]. The quantification of incorporated inhibitors in the PEO pores and their release rate in a corrosive medium is a determining factor for evaluating the ability and time of self-healing functionality.…”

Section: Combining Inhibitors With Other Corrosion Protection Strategiesmentioning

confidence: 99%

“…Thus, active and long-term corrosion protection can be achieved [ 60 ]. Recent research has highlighted LDH’s potential to serve as nanocontainers in the PEO layer [ 30 , 254 , 260 , 261 , 269 , 270 , 271 , 272 ]. A LDH layer can be directly grown on the PEO layer, which also blocks the PEO pores and improves its barrier properties.…”

Section: Combining Inhibitors With Other Corrosion Protection Strategiesmentioning

confidence: 99%

“…Zhang et al [ 260 ] loaded a PEO layer on AZ31 with 0.1 M concentration of 2,5PDC and two other inhibitors, namely metavanadate and 5-aminosalicylate. The adverse effect of inhibitor impregnation on the initial (within 20 min) impedance of the samples immersed in 3.5 wt.% was observed.…”

Section: Combining Inhibitors With Other Corrosion Protection Strategiesmentioning

confidence: 99%

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Chromate-Free Corrosion Protection Strategies for Magnesium Alloys—A Review: Part III—Corrosion Inhibitors and Combining Them with Other Protection Strategies

et al. 2022

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Owing to the unique active corrosion protection characteristic of hexavalent chromium-based systems, they have been projected to be highly effective solutions against the corrosion of many engineering metals. However, hexavalent chromium, rendered a highly toxic and carcinogenic substance, is being phased out of industrial applications. Thus, over the past few years, extensive and concerted efforts have been made to develop environmentally friendly alternative technologies with comparable or better corrosion protection performance to that of hexavalent chromium-based technologies. The introduction of corrosion inhibitors to a coating system on magnesium surface is a cost-effective approach not only for improving the overall corrosion protection performance, but also for imparting active inhibition during the service life of the magnesium part. Therefore, in an attempt to resemble the unique active corrosion protection characteristic of the hexavalent chromium-based systems, the incorporation of inhibitors to barrier coatings on magnesium alloys has been extensively investigated. In Part III of the Review, several types of corrosion inhibitors for magnesium and its alloys are reviewed. A discussion of the state-of-the-art inhibitor systems, such as iron-binding inhibitors and inhibitor mixtures, is presented, and perspective directions of research are outlined, including in silico or computational screening of corrosion inhibitors. Finally, the combination of corrosion inhibitors with other corrosion protection strategies is reviewed. Several reported highly protective coatings with active inhibition capabilities stemming from the on-demand activation of incorporated inhibitors can be considered a promising replacement for hexavalent chromium-based technologies, as long as their deployment is adequately addressed.

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Section: Combining Inhibitors With Other Corrosion Protection Strategiessupporting

confidence: 60%

Section: Combining Inhibitors With Other Corrosion Protection Strategiesmentioning

confidence: 99%

Section: Combining Inhibitors With Other Corrosion Protection Strategiesmentioning

confidence: 99%

Section: Combining Inhibitors With Other Corrosion Protection Strategiesmentioning

confidence: 99%

See 2 more Smart Citations

Chromate-Free Corrosion Protection Strategies for Magnesium Alloys—A Review: Part III—Corrosion Inhibitors and Combining Them with Other Protection Strategies

et al. 2022

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“…Likewise, PEO coatings have been formed on Mg alloys, or the alloys have been anodized to create the oxide phases and combined with LDHs to produce an improvement in the corrosion protection properties of Mg alloys [129][130][131][132][133]. Furthermore, LDHs have been employed to provide corrosion inhibition on PEO-coated Mg-LDH [134,135].…”

Section: Layered Double Hydroxidesmentioning

confidence: 99%

Emerging Layered Materials and Their Applications in the Corrosion Protection of Metals and Alloys

et al. 2022

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Metals and alloys are essential in modern society, and are used in our daily activities. However, they are prone to corrosion, with the conversion of the metal/alloy to its more thermodynamically-favored oxide/hydroxide phase. These undesirable corrosion reactions can lead to the failure of metallic components. Consequently, corrosion-protective technologies are now more important than ever, as it is essential to reduce the waste of valuable resources. In this review, we consider the role of emerging 2D materials and layered materials in the development of a corrosion protection strategy. In particular, we focus on the materials beyond graphene, and consider the role of transition metal dichalcogenides, such as MoS2, MXenes, layered double hydroxides, hexagonal boron nitride and graphitic carbon nitride in the formulation of effective and protective films and coatings. Following a short introduction to the synthesis and exfoliation of the layered materials, their role in corrosion protection is described and discussed. Finally, we discuss the future applications of these 2D materials in corrosion protection.

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Plasma Electrolytic Oxidation upon Mg Alloys: Fundamentals, State-of-the-Art Progress and Challenges

Sisarwal

Dong

Toh

et al. 2022

Conversion Coatings for Magnesium and Its Alloys

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Corrosion protection properties of different inhibitors containing PEO/LDHs composite coating on magnesium alloy AZ31

Cited by 30 publications

References 80 publications

Chromate-Free Corrosion Protection Strategies for Magnesium Alloys—A Review: Part III—Corrosion Inhibitors and Combining Them with Other Protection Strategies

Chromate-Free Corrosion Protection Strategies for Magnesium Alloys—A Review: Part III—Corrosion Inhibitors and Combining Them with Other Protection Strategies

Emerging Layered Materials and Their Applications in the Corrosion Protection of Metals and Alloys

Plasma Electrolytic Oxidation upon Mg Alloys: Fundamentals, State-of-the-Art Progress and Challenges

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