Ordering and disordering of in situ grown MgAl-layered double hydroxide and its effect on the structural and corrosion resistance properties

Abstract

A MgAl-layered double hydroxide (MgAl-LDH) protective film was developed on AA6082 substrates via the in situ hydrothermal growth method to obtain a distinct cauliflower-like LDH structure, and coated substrates were further heat-treated in air at temperatures from 100 to 250°C to further improve the corrosion resistance of MgAl-LDH by taking advantage of the LDH memory effect; also, the effect of calcination on MgAl-LDH structural stability and the corresponding corrosion resistance properties were investigated. The structural characterization of uncalcined and calcined LDH films were examined using scanning electron microscopy, energy-dispersive spectroscopy, X-ray diffraction, thermogravimetric analysis, differential scanning calorimetry, and Fourier transform infrared spectroscopy. The corresponding corrosion protection efficiency of the developed coating was studied through potentiodynamic polarization experiments and by electrochemical impedance spectroscopy. Compared with uncalcined MgAl-LDH, the calcined film showed a relatively lower corrosion current density and a higher impedance value, especially after heat treatment at 250°C. The findings demonstrate that calcination strongly affects the oriented growth of the LDH and causes an increase in the surface area and contraction of the basal spacing, which in turn caused a compact structure that substantially influenced the LDH corrosion resistance properties.

Keywords

layered double hydroxide / calcination / in situ growth / thin films / corrosion protection

References

[1] Davis JR. Corrosion of Aluminum and Aluminum Alloys, 1999

[2] Winston Revie R. Uhlig's Corrosion Handbook, 2011, John Wiley & Sons, New Jersey

[3] Klodian X, Finšgar M. Organic corrosion inhibitors for aluminium and its alloys in acid solutions: A review. RSC Adv., 2016, 6, 62833.

[4] Zubillaga O, Cano FJ, Azkarate I, Molchan IS, Thompson GE, Skeldon P. Anodic films containing polyaniline and nanoparticles for corrosion protection of AA2024T3 aluminium alloy. Surf. Coat. Technol., 2009, 203, 1494.

[5] Boisier G, Lamure A, Pébère N, Portail N, Villatte M. Corrosion protection of AA2024 sealed anodic layers using the hydrophobic properties of carboxylic acids. Surf. Coat. Technol., 2009, 203, 3420.

[6] Leroux F, Taviot-Guého C. Fine tuning between organic and inorganic host structure: New trends in layered double hydroxide hybrid assemblies. J. Mater. Chem., 2005, 35-36, 3628.

[7] Evans DG, Duan X. Preparation of layered double hydroxides and their applications as additives in polymers, as precursors to magnetic materials and in biology and medicine. Chem. Commun., 2006, 5, 485.

[8] Evans DG, Slade RCT. Structural aspects of layered double hydroxides, [in] Layered Double Hydroxides, 2006, Springer, Berlin, Heidelberg, 1

[9] F. Bergaya and G. Lagaly, General introduction: Clays, clay minerals, and clay science, Dev. Clay Sci., 1(2006), p. 1.

[10] Miyata S. Physico-chemical properties of synthetic hydrotalcites in relation to composition. Clays Clay Miner, 1980, 28, 50.

[11] Chitrakar R, Sonoda A, Makita Y, Hirotsu T. Calcined Mg-Al layered double hydroxides for uptake of trace levels of bromate from aqueous solution. Ind. Eng. Chem. Res., 2011, 50, 9280.

[12] Ye K, Zhao LN, Zhang S, Zhang FZ, Dong MD, Xu SL. Morphologies, preparations and applications of layered double hydroxide micro-/nanostructures. Materials, 2010, 3, 5220.

[13] Ren QD, Wang G, Wu TT, He X, Wang JR, Yang J, Yu C, Qiu JS. Calcined MgAl-layered double hydroxide/ graphene hybrids for capacitive deionization. Ind. Eng. Chem. Res., 2018, 57, 6417.

[14] Yuan XY, Wang YF, Wang J, Zhou C, Tang Q, Rao XB. Calcined graphene/MgAl-layered double hydroxides for enhanced Cr(VI) removal. Chem. Eng. J., 2013, 221, 204.

[15] Thaísa TPF, Aquino SF, Pereira SI, Dias A. Use of calcined layered double hydroxides for the removal of color and organic matter from textile effluents: kinetic, equilibrium and recycling studies. Braz. J. Chem. Eng., 2014, 31, 19.

[16] Iqbal Muhammad Ahsan, Fedel Michele. The effect of the surface morphologies on the corrosion resistance of in situ growth MgAl-LDH based conversion film on AA6082. Surface and Coatings Technology, 2018, 352, 166-174.

[17] Cullity BD, Stock SR. Elements of X-ray Diffraction, 2001, Pearson, London

[18] Chitrakar R, Tezuka S, Sonoda A, Sakane K, Hirotsu T. A New method for synthesis of Mg-Al, Mg-Fe, and Zn-Al layered double hydroxides and their uptake properties of bromide ion. Ind. Eng. Chem. Res., 2008, 47, 4905.

[19] Zhang F, Zhang CL, Song L, Zeng RC, Liu ZG, Cui HZ. Corrosion of in-situ grown MgAl-LDH coating on aluminum alloy. Trans. Nonferrous Met. Soc. China, 2015, 25, 3498.

[20] Wang Q, Huang H, Weig J, Chen LW, Liu Y, Chang J, Zhong ZY, Luo JZ, Borgna A. The effect of trivalent cations on the performance of Mg-M-CO3 layered double hydroxides for high-temperature CO2 capture. ChemSus-Chem, 2010, 3, 965.

[21] Hussein MZB, Yun-Hin TY, bin Tawang MM, Shahadan R. Thermal degradation of (zinc-aluminium-layered double hydroxide-dioctyl sulphosuccinate) nanocomposite. Mater. Chem. Phys., 2002, 74, 265.

[22] Warren BE, Bodenstein P. The shape of two-dimensional carbon black reflections. Acta Crystallogr., 1966, 20, 602.

[23] Aisawa S, Hirahara H, Uchiyama H, Takahashi S, Narita E. Synthesis and thermal decomposition of Mn-Al layered double hydroxides. J. Solid State Chem., 2002, 167, 152.

[24] Wu QL, Olafsen A, Vistad B, Roots J, Norby P. Delamination and restacking of a layered double hydroxide with nitrate as counter anion. J. Mater. Chem., 2005, 15, 4695.

[25] Kloprogge JT, Frost RL. Fourier transform infrared and Raman spectroscopic study of the local structure of Mg-, Ni-,and Co-hydrotalcites. J. Solid State Chem., 1999, 146, 506.

[26] Ni ZM, Xia SJ, Fang CP, Wang LG, Hu J. Synthesis, characterization and thermal property of Cu/Co/Mg/Al hydrotalcite like compounds. Rare Met. Mater. Eng., 2008, 37, 634

[27] Venugopal BR, Shivakumara C, Rajamathi M. A composite of layered double hydroxides obtained through random costacking of layers from Mg-Al and Co-Al LDHs by delamination-restacking: Thermal decomposition and reconstruction behavior. Solid State Sci., 2007, 9, 287.

[28] Wang FY, Guo ZG. Insitu growth of durable superhydrophobic Mg-Al layered double hydroxides nanoplatelets on aluminum alloys for corrosion resistance. J. Alloys Compd., 2018, 767, 382.

[29] Zhang F, Zhang CL, Song L, Zeng RC, Liu ZG, Cui HZ. Corrosion of in-situ grown MgAl-LDH coating on aluminum alloy. Trans. Nonferrous Met. Soc. China, 2015, 25, 3498.

[30] Ke XY, Bernal SA, Provis JL. Uptake of chloride and carbonate by Mg-Al and Ca-Al layered double hydroxides in simulated pore solutions of alkali-activated slag cement. Cem. Concr. Res., 2017, 100, 1.

[31] Iqbal MA, Fedel M. Effect of synthesis conditions on the controlled growth of MgAl-LDH corrosion resistance film: Structure and corrosion resistance properties. Coatings, 2019, 9, 1.

[32] Zhang F, Liu ZG, Zeng RC, Li SQ, Cui HZ, Song L, Han EH. Corrosion resistance of Mg-Al-LDH coating on magnesium alloy AZ31. Surf. Coat. Technol., 2014, 258, 1152.

[33] Lin KD, Luo XH, Pan XY, Zhang CX, Liu YL. Enhanced corrosion resistance of LiAl-layered double hydroxide (LDH) coating modified with a Schiff base salt on aluminum alloy by one step in-situ synthesis at low temperature. Appl. Surf. Sci., 2019, 463, 1085.

[34] Wang Q, O'Hare D. Recent advances in the synthesis and application of layered double hydroxide (LDH) nanosheets. Chem. Rev., 2012, 112, 4124.

[35] Elhalil A, Farnane M, Machrouhi A, Mahjoubi FZ, Elmoubarki R, Tounsadi H, Abdennouri M, Barka N. Effects of molar ratio and calcination temperature on the adsorption performance of Zn/Al layered double hydroxide nanoparticles in the removal of pharmaceutical pollutants. J. Sci.: Adv. Mater. Devices, 2018, 3, 188

[36] Yan ZX, Zhu BC, Yu JG, Xu ZH. Effect of calcination on adsorption performance of Mg-Al layered double hydroxide prepared by a water-in-oil microemulsion method. RSC Adv., 2016, 6, 50128.