Preparation of superhydrophobic Li–Al-Ala LDH/SA film with enhanced corrosion resistance and mechanical stability on AZ91D Mg alloy

Wang, Chengfeng; Huang, Yinchun; Li, Jingling; Wang, Meifeng; Du, Xiaoqing; Chen, Dongchu

doi:10.1007/s10853-022-07582-1

Cited by 11 publications

(3 citation statements)

References 52 publications

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“…The Cl – deterioration changes the film’s interlayer spacing. Increasing the interlamellar spacing will ultimately lead to a change in the total area of the LDH film . The difference in the total capacitance of the film before and after immersion is slight, indicating that the film’s overall structure changes little.…”

Section: Characterization Of Mg–al Ldh Filmsmentioning

confidence: 99%

“…Increasing the interlamellar spacing will ultimately lead to a change in the total area of the LDH film. 48 The difference in the total capacitance of the film before and after immersion is slight, indicating that the film’s overall structure changes little. In summary, the corrosion resistance of the Mg–Al LDH film decreased after 180 h immersion; nevertheless, the Mg–Al LDH film still gave good protection to the Mg alloy.…”

Section: Characterization Of Mg–al Ldh Filmsmentioning

confidence: 99%

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Optimization of Mg–Al Layered Double Hydroxide Film Preparation and Corrosion Resistance Study on AZ91D Mg Alloy by Multivariate Polynomial Regression Fitting

Wang,

Liu,

Wei

et al. 2024

ACS Omega

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Layered double hydroxide (LDH) films have received extensive attention for their unique physical barrier function and ion exchange properties, which make them promising candidates for corrosion protection of magnesium alloys. In this paper, we used the multiple polynomial regression fitting method to establish a regression equation for the electrochemical corrosion resistance with the reaction temperature (T), pH, and reaction time (t) of the Mg−Al LDH film on the AZ91D magnesium alloy. The goodness of fit, confidence, and residual analyses confirmed the high accuracy of the model equation. According to the calculation using the fmincon function, the best corrosion resistance of the prepared samples could be achieved when the parameters are T = 135 °C, pH = 12.0, and t = 15 h. Then, the experimental results showed that the corrosion current density (I corr ) of the obtained LDH film under the above conditions could be 1.07 × 10 −7 A/cm 2 , approximately 3 orders of magnitude lower than the magnesium alloy substrate, after immersion in a 3.5 wt % NaCl solution for 180 h, the surface structure of the LDH film did not change significantly, and the I corr was still 2 orders of magnitude higher than that of the magnesium alloy substrate. Hence, a synergistic effect equation for the reaction temperature, pH, and reaction time on the corrosion resistance of the LDH film on a magnesium alloy surface prepared by the hydrothermal method was obtained. Moreover, using this equation, we obtained an LDH film with good corrosion resistance and durability, providing theoretical guidance for optimizing the process of preparing the LDH film by the hydrothermal method in practical applications.

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Section: Characterization Of Mg–al Ldh Filmsmentioning

confidence: 99%

Section: Characterization Of Mg–al Ldh Filmsmentioning

confidence: 99%

Optimization of Mg–Al Layered Double Hydroxide Film Preparation and Corrosion Resistance Study on AZ91D Mg Alloy by Multivariate Polynomial Regression Fitting

Wang,

Liu,

Wei

et al. 2024

ACS Omega

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“…Their general formula can be expressed as [M 2+ 1−x M 3+ x (OH) 2 ] x+ (A n− ) x/n •yH 2 O (M 2+ and M 3+ are metal cations in the laminates, and A n− is the charge-balancing anion between the layers). Owing to the diversity of chemical composition, unique structures, exchange ability, high thermal stability, and promising actively protective properties [23][24][25][26][27], LDHs have been widely investigated in metal corrosion protection [28], lubricant additives [11,29,30], and other uses such as fuel cell, electrode material, electrocatalysts, and supercapacitor [31][32][33][34]. Many different methods employed for the fabrication of LDH coatings have been reported in the literature, among which the in situ growth approach seems to be one of the most flexible, simplest, and inexpensive techniques for preparing LDH films on the surface of metal alloys [11,20,22,35].…”

Section: Introductionmentioning

confidence: 99%

In Situ Growth of High-Performance ZnAl-Layered Double Hydroxides/Al2O3 Composite Coatings on Aluminum Alloy

Ying,

Zhao,

Sun

et al. 2023

Coatings

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In this research, high-performance ZnAl-layered double hydroxides (ZnAl-LDHs) with different Zn2+ concentrations were prepared on the surface of an anodized 1060 aluminum alloy using the in situ growth method, and the influence of Zn2+ concentration on corrosion resistance and tribological behavior was further explored. The surface morphology, element distribution, phase composition, and mechanical performance of ZnAl-LDHs/anodic aluminum oxide (AAO) composite coatings were tested and analyzed. Subsequently, the investigation of the anti-corrosion properties and tribological behavior of as-prepared composite coatings and AAO were conducted experimentally. The results show that with the increase in Zn2+ concentration, the thickness and bonding strength of the coatings gradually increase, and the hardness progressively decreases. The ZnAl-LDHs/AAO composite coating with a Zn2+ concentration of 0.3 mol/L exhibits the best anti-corrosion ability, which has the minimum corrosion current density of 2.435 × 10−9 A/cm2. This can be attributed to the uniform and compact ZnAl-LDH films where the porous structure of the AAO is well sealed. Moreover, the excellent friction-reduction and anti-wear properties of ZnAl-LDHs/AAO composite coatings with larger Zn2+ concentrations are verified using a ball-on-disc rotating wear tester under dry wear. A reasonable mechanism for improving tribological properties of resulting ZnAl-LDHs/AAO composite coatings is proposed.

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Preparation of cerium myristate (super)hydrophobic coating by one-step electrodeposition and its protective properties on aluminum alloys

Fang,

Zhu,

Liu

et al. 2024

Appl. Phys. A

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Preparation of superhydrophobic Li–Al-Ala LDH/SA film with enhanced corrosion resistance and mechanical stability on AZ91D Mg alloy

Cited by 11 publications

References 52 publications

Optimization of Mg–Al Layered Double Hydroxide Film Preparation and Corrosion Resistance Study on AZ91D Mg Alloy by Multivariate Polynomial Regression Fitting

Optimization of Mg–Al Layered Double Hydroxide Film Preparation and Corrosion Resistance Study on AZ91D Mg Alloy by Multivariate Polynomial Regression Fitting

In Situ Growth of High-Performance ZnAl-Layered Double Hydroxides/Al2O3 Composite Coatings on Aluminum Alloy

Preparation of cerium myristate (super)hydrophobic coating by one-step electrodeposition and its protective properties on aluminum alloys

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