Enhancement of corrosion resistance of AZ31 Mg alloys by one-step in situ synthesis of ZnAl-LDH films intercalated with organic anions (ASP, La)

Song, Yuhan; Tang, Yan; Fang, Liang; Wu, Fang; Zeng, Xianguang; Hu, Jia; Zhang, Shu Fang; Jiang, Bin; Luo, Hai

doi:10.1016/j.jma.2020.03.013

Cited by 57 publications

(14 citation statements)

References 36 publications

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“…Phytic acid, aspartic acid (ASP) [ 226 , 227 ], lauric acid (LA) [ 226 ], 8HQ [ 228 , 229 ], sodium dodecyl benzene sulfonate (SDBS) [ 230 ], sodium alginate [ 230 ], and 2-mercaptobenzothiazole (MBT) [ 230 ] are examples of organic inhibitors that are successfully intercalated in LDH conversion coating on Mg alloys. Deprotonation of mentioned organic molecules, which is usually carried out with NaOH solution, is required to obtain their anion form, so that they can be intercalated within the LDH layers [ 217 ].…”

Section: Combining Inhibitors With Other Corrosion Protection Strategiesmentioning

confidence: 99%

“…Deprotonation of mentioned organic molecules, which is usually carried out with NaOH solution, is required to obtain their anion form, so that they can be intercalated within the LDH layers [ 217 ]. The increased d (003) -spacing between the LDH layers by hosting large anions of organic inhibitors facilitates the anion exchange process with aggressive Cl − [ 226 ].…”

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 Strategiesmentioning

confidence: 99%

Section: Combining Inhibitors With Other Corrosion Protection Strategiesmentioning

confidence: 99%

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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“…Due to the elevated temperatures employed in hydrothermal synthesis, LDHs with good crystallinity can be formed. In addition, other components, such as graphene oxide (GO) [84,85] and corrosion inhibitors [86], can be easily combined with the LDHs in a onestep hydrothermal experiment, as illustrated in Figure 4. Using this approach, Yan et al [84] formed graphene-modified LDHs by dispersing GO with the Zn(NO 3 ) 2 and Al(NO 3 ) 3 precursor salt solution, while corrosion inhibitors, namely aspartate and laurate anions [86], were incorporated into the LDH in a single step.…”

Section: Layered Double Hydroxidesmentioning

confidence: 99%

“…In addition, other components, such as graphene oxide (GO) [84,85] and corrosion inhibitors [86], can be easily combined with the LDHs in a onestep hydrothermal experiment, as illustrated in Figure 4. Using this approach, Yan et al [84] formed graphene-modified LDHs by dispersing GO with the Zn(NO 3 ) 2 and Al(NO 3 ) 3 precursor salt solution, while corrosion inhibitors, namely aspartate and laurate anions [86], were incorporated into the LDH in a single step. Clearly, hydrothermal synthesis exhibits high flexibility in terms of additives, morphology, crystal orientation, and structure of the final LDH.…”

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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“…Magnesium alloys have been applied in automotive, aerospace fields, and military equipment on a large scale because of low density, high thermal conductivity, good electromagnetic shielding, and easy recyclability (Xie et al, 2018;Yao et al, 2020;Yang et al, 2021). However, magnesium alloys are vulnerable to aggressive media due to their high chemical activity (Song et al, 2021), which severely restricts the potential application of magnesium alloys. So, a variety of surface-modification methods to enhance their corrosion resistance have been proposed in recent decades, such as micro-arc oxidation (Xu et al, 2021), friction stir processing, laser surface modification, physical vapor deposition, (Zhang et al, 2020), and so on.…”

Section: Introductionmentioning

confidence: 99%

Facile Fabrication and Properties of Super-hydrophobic MgAl-LDH Films With Excellent Corrosion Resistance on AZ31 Magnesium Alloy

Han

Wang

et al. 2021

Front. Mater.

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A super-hydrophobic anti-corrosion film was facilely prepared via in situ growth of layered double hydroxides (LDHs) on the etched AZ31 magnesium alloy and then modification by 1H, 1H, 2H, 2H-perfluorooctyltrimethoxysilane (PFOTMS) in this work. The morphology, structure, composition, surface roughness and water contact angles (WCA), and the anti-corrosion performance of the samples were investigated. The results revealed that the micro/nano hierarchical surface morphology of the films was composed of island structures obtained after chemical etching and MgAl-LDH nanowalls grown in situ. The best hydrophobicity (CA = 163°) was obtained on the MgAl-LDHs with the maximum surface roughness. Additionally, the potentiodynamic polarization, electrochemical impedance spectroscopy, and immersion test indicated that the super-hydrophobic LDH films provided better corrosion resistance to AZ31 magnesium alloy due to the double-protection derived from the LDHs and super-hydrophobic properties. Furthermore, the contact angle could be kept at above 140° after dipped in 3.5 wt% NaCl solution for 6 days.

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Enhancement of corrosion resistance of AZ31 Mg alloys by one-step in situ synthesis of ZnAl-LDH films intercalated with organic anions (ASP, La)

Cited by 57 publications

References 36 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

Facile Fabrication and Properties of Super-hydrophobic MgAl-LDH Films With Excellent Corrosion Resistance on AZ31 Magnesium Alloy

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