Corrosion resistance and hydrophobicity of myristic acid modified Mg-Al LDH/Mg(OH)2 steam coating on magnesium alloy AZ31

Qiu, Zai-Meng; Zhang, Fen; Chu, Jun-Tong; Li, Yuchao; Song, Liang

doi:10.1007/s11706-020-0492-x

Cited by 21 publications

(5 citation statements)

References 43 publications

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“…In particular, the LDH/SC‐100°C (Figure 10E) composite coating is similar to the coating before immersion, and there are no evident cracks, indicating that its corrosion resistance reaches the highest point compared to other samples. The EDS mapping results after corrosion showed that the proportion of O and Mg in SC and LDH/SC composite coating was higher, indicating that Mg(OH) 2 may be generated during the corrosion process 24 . Furthermore, the content of Cl element in SC was evidently higher than those of LDH/SC composite coating.…”

Section: Resultsmentioning

confidence: 96%

“…that the proportion of O and Mg in SC and LDH/SC composite coating was higher, indicating that Mg(OH) 2 may be generated during the corrosion process. 24 Furthermore, the content of Cl element in SC was evidently higher than those of LDH/SC composite coating. The reason for this result may be that the SC directly exposed to the aggressive NaCl solutions, while the LDH/SC composite coating worked as a barrier to prevent the penetration of Cl − ions and provided the ion exchange ability by absorbing and retaining Cl − ions from the NaCl soultions.…”

Section: Protection Ability Of Coatingsmentioning

confidence: 94%

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Enhanced corrosion resistance of layered double hydroxides/steam coating composite coating prepared by the hydrothermal method on LA43M magnesium–lithium alloy substrates

Zhang

Hou

et al. 2023

Int J Applied Ceramic Tech

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An excellent anticorrosion Mg–Al layered double hydroxide (LDH) composite coating was successfully fabricated on LA43M magnesium alloy substrates via an in situ steam coating (SC) process and a subsequent hydrothermal treatment at different temperatures. The microstructure, composition and phase formation of the composite coatings were studied via X‐ray diffractometer, energy disperse spectroscopy, and scanning electron microscope, respectively. The corrosion resistance of composite coatings was further investigated using electrochemical measurements and corrosion test. The results showed that LDH/SC composite coating has typical nanosheets microstructure, which effectively seal the defects of SC. As the hydrothermal temperature increases, the thickness and density of nanosheets increases, and the corrosion resistance was significantly improved. Especially, the Mg–Al LDH/SC composite coating prepared at 100°C was the most dense and thickness, and exhibited the optimal and long‐term anticorrosion resistance in 3.5 wt.% NaCl soultion. It has the lowest Icorr (1.767 × 10−8 A/cm2), which decreased by three and two orders of magnitude compared with the bare substrate and SC. Furthermore, it can maintain good chemical stability after immersion in the corrosion medium for 192 h and its hydrogen evolution rate (0.00416 mL·cm−2·h−1) and weight lost rate (0.00266 mg·cm−2·h−1) were the lowest compared with other samples.

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Section: Resultsmentioning

confidence: 96%

Section: Protection Ability Of Coatingsmentioning

confidence: 94%

Enhanced corrosion resistance of layered double hydroxides/steam coating composite coating prepared by the hydrothermal method on LA43M magnesium–lithium alloy substrates

Zhang

Hou

et al. 2023

Int J Applied Ceramic Tech

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“…Magnesium alloys have the advantage of light mass and high strength, but they are also more vulnerable to corrosion than other alloys [1][2][3], especially in solutions containing Cland HCO 3 ions [4,5], so anti-corrosion studies for these solutions are key to the protection of magnesium alloys [6,7]. During the preparation of anti-corrosion coatings with magnesium alloys, the composition of the coating produced on the surface will contain magnesium hydroxide if the magnesium alloys are in an alkaline environment [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

One-step hydrothermal preparation of corrosion-resistant coatings with microsphere structure

Chen,

Zhu

2024

Surf. Topogr.: Metrol. Prop.

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Rapid corrosion rate is limiting the engineering application of magnesium alloys. In this paper, an attempt was made to produce a corrosion resistant coating on the surface of AZ91D magnesium alloy using hydrothermal method. The coating surface is covered with microspheres and has a dense structure, which effectively isolates the contact between the outside world and the substrate. The corrosion potential(E) raised from -1.57V to -0.45V compared to the bare sample. The corrosion current density and corrosion rate of the coating can be reduced by 6 orders of magnitude, and the polarization resistance raised by 6 orders of magnitude. The thickness of the coating is 45.4 μm at the moment, with a minimum of defects on the surface, resulting in excellent corrosion resistance in the immersion test. The coating also has good adhesion strength at 4B, which can expand the application range of magnesium alloy in corrosive environments.

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“…The results show that the corrosion resistance of the film coated for 7 h was the best. Qiu et al [ 16 ] obtained a hydrophobic film on the surface of AZ31 magnesium alloy by in‐situ steam coating process and a subsequent surface modification with environment‐friendly myristic acid (MA). The results implicate that the LDH coating has nano‐flake microstructure and remains unchanged after MA modification.…”

Section: Introductionmentioning

confidence: 99%

Comparative Study on Microstructure, Corrosion Morphology, and Friction Wear Properties of Layered Double Hydroxide/Steam Coating Composite Coatings on Mg–Li Alloy

Zhang,

Lian,

Hou

et al. 2024

Adv Eng Mater

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Mg alloy is the preferred material for the lightweight development of manufacturing industry. However, its application is limited due to the poor wear resistance and corrosion resistance. In this experiment, Mg‐Al LDH/SC (Layered double hydroxide/Steam coating) composite coatings were prepared on the surface of LA43M Mg‐Li alloy by steam treatment and in‐situ hydrothermal method for different times (12 h, 18 h, 24 h, 30 h and 36 h). The morphology and structure of the coatings were characterized by SEM, EDS, and XRD, and the friction wear test of the coatings was carried out. The corrosion resistance of the coatings was evaluated by immersion tests and hydrogen evolution experiments. The effect of hydrothermal time on the growth characteristics, wear resistance, and corrosion behavior of LDH/SC coatings in 3.5 wt.% NaCl solution was systematically investigated. In addition, the growth mechanism and corrosion resistance mechanism of the LDH/SC coating were discussed. The results show that the composite coatings is mainly composed of LDH and Mg(OH)2 phases. Appropriately prolonging the hydrothermal reaction time is beneficial to the nucleation and growth of LDH. When the hydrothermal time is 30 h, the prepared coating has the best density, and the prepared coating can significantly improve the corrosion resistance and friction wear properties of the substrate.This article is protected by copyright. All rights reserved.

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Corrosion resistance and hydrophobicity of myristic acid modified Mg-Al LDH/Mg(OH)2 steam coating on magnesium alloy AZ31

Cited by 21 publications

References 43 publications

Enhanced corrosion resistance of layered double hydroxides/steam coating composite coating prepared by the hydrothermal method on LA43M magnesium–lithium alloy substrates

Enhanced corrosion resistance of layered double hydroxides/steam coating composite coating prepared by the hydrothermal method on LA43M magnesium–lithium alloy substrates

One-step hydrothermal preparation of corrosion-resistant coatings with microsphere structure

Comparative Study on Microstructure, Corrosion Morphology, and Friction Wear Properties of Layered Double Hydroxide/Steam Coating Composite Coatings on Mg–Li Alloy

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