Development of a thiophene derivative modified LDH coating for Mg alloy corrosion protection

Li, Lixin; Xie, Zhihui; Fernandez, Carlos; Wu, Liang; Cheng, Daojian; Jiang, Xiaohui; Zhong, Chuan‐Jian

doi:10.1016/j.electacta.2019.135186

Cited by 88 publications

(21 citation statements)

References 57 publications

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“…Besides, R s , R o , and R ct represent the solution resistance, oxide film resistance, and charge-transfer resistance, respectively. With the thin natural oxide film forming on the surface of the aluminum alloy, the alternating current in the high-frequency region is easy to pass through, and the phase-angle value is small …”

Section: Resultsmentioning

confidence: 99%

“…With the thin natural oxide film forming on the surface of the aluminum alloy, the alternating current in the high-frequency region is easy to pass through, and the phase-angle value is small. 61 The electrochemical behavior of Mod Al can be explained by the EC in Figure 13(c). In Figure 12(d), three obvious time constants can be observed in the phase-frequency Bode plot of Mod Al, namely, Q 1 , Q 2 , and Q 3 in Figure 13(c).…”

Section: ■ Experimental Proceduresmentioning

confidence: 99%

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Superhydrophobic Films with Enhanced Corrosion Resistance and Self-Cleaning Performance on an Al Alloy

Zeng

Zhou

et al. 2020

Langmuir

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In this article, a novel and facile method is used to construct superhydrophobic surfaces on aluminum alloys. A solution of aluminum chloride hexahydrate and N-dodecyltrimethoxysilane (DTMS) in ethanol was used as the electrolyte solution. The hydrolysis of DTMS was accelerated during the electrodeposition process, and the hydrolysate was bonded to a pretreated aluminum surface. The prepared aluminum alloy sample exhibits both superhydrophobicity (the surface water contact angle reached 155°) and excellent corrosion resistance. The inhibition efficiency of this sample is as high as 99.9% in 3.5 wt % NaCl solution, which remains at 98% even after 30 days of immersion. Thus, our fabrication can be well applied to the field of marine corrosion protection. Therefore, the working mechanism was discussed by confocal Raman microspectroscopy (CRM). In addition, the investigation by CRM and electrochemical impedance spectroscopy (EIS) also indicates that superhydrophobic samples show good stability in NaCl solution. The fabrication method can inspire new ideas for the construction of superhydrophobic aluminum alloys in the marine environment.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Experimental Proceduresmentioning

confidence: 99%

Superhydrophobic Films with Enhanced Corrosion Resistance and Self-Cleaning Performance on an Al Alloy

Zeng

Zhou

et al. 2020

Langmuir

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“…Recent attempts have been made to achieve self-healing LDH coating by depositing an additional layer of healing agents on LDH coating or introducing healing molecules as an active cation in the double-layered structure. Li et al [ 211 ] proposed a bio-friendly thiophene derivate corrosion inhibitor (CI) for self-healing of Mg–Al-LDH coating by fabricating a noble N -alkyl-N, N -dimethyl- N -(3-thienylmethylene) ammonium bromide ( NTA ) molecule and deposited on MgAl-LDH by immersion method. Along with a highly positive shift in E corr , the stable physiochemical adsorption of NTA provides significant self-healing character on damaged Mg site as systematically shown in Fig.…”

Section: Coatings and Their Current Statusmentioning

confidence: 99%

Section: Coatings and Their Current Statusmentioning

confidence: 99%

Progress in bioactive surface coatings on biodegradable Mg alloys: A critical review towards clinical translation

Singh

Batra

Kumar

et al. 2023

Bioactive Materials

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“…Additionally, the formation of dense LDH films on the Mg alloy surface is another effective method for obtaining LDH films with a high corrosion resistance. Li [ 19 ] used a thiophene derivative to produce highly corrosion-resistant LDH coatings with no big holes or fractures on the surface of a magnesium alloy. Ahsan Iqbal [ 20 ] proposed that more compact and dense LDH films can be prepared at 100 °C for an 18 h reaction time with improved corrosion resistance.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Corrosion Resistance of Layered Double Hydroxide Films on Mg Alloy: The Key Role of Cationic Surfactant

et al. 2022

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In this study, dense anticorrosion magnesium–aluminum layered double hydroxide (MgAl-LDH) films were prepared for the first time by introducing a cationic surfactant tetradecyltrimethyl ammonium bromide (TTAB) in the process of in situ hydrothermal synthesis of Mg-Al LDH films on an AZ31 magnesium alloy. Results of XRD, FTIR, and SEM confirmed that TTAB forms the MgAl-LDH-TTAB, although TTAB cannot enter into LDH layers, and MgAl-LDH-TTAB powders are much smaller and more homogenous than MgAl-CO32−-LDH powders. Results of SEM, EDS, mapping, and XPS confirmed that TTAB forms the MgAl-LDH-TTAB films and endows LDH films with denser structure, which provides films with better shielding efficiency. Results of potentiodynamic polarization curves (PDP) and electrochemical impedance spectroscopy (EIS) confirmed that MgAl-LDH-TTABx g films have better corrosion resistance than an MgAl-CO32−-LDH film. The corrosion current density (icorr) of the MgAl-LDH-TTAB0.35 g film in 3.5 wt.% NaCl solution was reduced to 1.09 × 10−8 A.cm−2 and the |Z|f = 0.05 Hz value was increased to 4.48 × 105 Ω·cm2. Moreover, the increasing concentration of TTAB in MgAl-LDH-TTABx g (x = 0.025, 0.05, 0.1, 0.2 and 0.35) provided denser outer layer LDH films and thereby increased the corrosion resistance of the AZ31 Mg alloy. Additionally, the |Z|f = 0.05 Hz values of the MgAl-LDH-TTAB0.35 g film still remained at 105 Ω·cm2 after being immersed in 3.5 wt.% NaCl solution for 168 h, implying the good long-term corrosion resistance of MgAl-LDH-TTABx g films. Therefore, introducing cationic surfactant in the process of in situ hydrothermal synthesis can be seen as a novel approach to creating efficient anticorrosion LDH films for Mg alloys.

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Development of a thiophene derivative modified LDH coating for Mg alloy corrosion protection

Cited by 88 publications

References 57 publications

Superhydrophobic Films with Enhanced Corrosion Resistance and Self-Cleaning Performance on an Al Alloy

Superhydrophobic Films with Enhanced Corrosion Resistance and Self-Cleaning Performance on an Al Alloy

Progress in bioactive surface coatings on biodegradable Mg alloys: A critical review towards clinical translation

Enhanced Corrosion Resistance of Layered Double Hydroxide Films on Mg Alloy: The Key Role of Cationic Surfactant

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