Abstract
The mechanical property and the corrosion protection of organosilane-epoxy coating on Al alloy 6101 in an alkaline solution are studied. The evaluations include potentiodynamic polarization (PDP) measurements, electrochemical impedance spectroscopy (EIS) studies, effective weight loss, water contact angle, peeling off test, surface adhesion and scratch tests, etc. It is concluded that the optimal ratio of organosilane-epoxy to toluene of the dipping solution is 1 : 4.5. The peeling off strength of this coating on Al alloy is 0.144 F/N, the critical load to scratch damage of the coating surface is 20.982 g, the water contact angle becomes 106°, and the inhibition efficiency of the coated Al in an alkaline solution of NaOH with pH 11 obtained from PDP measurements, EIS and effective weight loss tests show that the protection efficiency of this coating in the base solution reaches about 99% at the optimal ratio of organosilane-epoxy to toluene, which indicates the validity of the coating on this Al alloy.
Similar content being viewed by others
REFERENCES
Xiong, H., Qi, F., Zhao, N., Yuan. H., et al., Effect of organically modified sepiolite as inorganic nanofiller on the anti-corrosion resistance of epoxy coating, Mater. Lett., 2020, vol. 260, ID 126941. https://doi.org/10.1016/j.matlet.2019.126941
Lazarević, Z.Ž., Mišković-Stanković, V.B., Kačarević-Popović, Z., and Dražić, D.M., Determination of the protective properties of electrodeposited organic epoxy coatings on aluminium and modified aluminium surfaces, Corros. Sci., 2005, vol. 47, no. 3, p. 823. https://doi.org/10.1016/j.corsci.2004.07.016
Sharifi Golru, S., Attar, M.M., and Ramezanzadeh, B., Effects of surface treatment of aluminium alloy 1050 on the adhesion and anticorrosion properties of the epoxy coating, Appl. Surf. Sci., 2015, vol. 345, p. 360. https://doi.org/10.1016/j.apsusc.2015.03.148
Guo, L., Gu, C., Feng, J., Guo, Y., et al., Hydrophobic epoxy resin coating with ionic liquid conversion pretreatment on magnesium alloy for promoting corrosion resistance, J. Mater. Sci. Technol., 2020, vol. 37, p. 9. https://doi.org/10.1016/j.jmst.2019.06.024
Calabrese, L., Bonaccorsi, L., Capri, A., and Proverbio, E., Adhesion aspects of hydrophobic silane zeolite coatings for corrosion protection of aluminium substrate, Prog. Org. Coat., 2014, vol. 77, p. 1341. https://doi.org/10.1016/j.porgcoat.2014.04.025
Rodič, P., Milošev, I., Lekka, M., Andreatta, F., et al., Corrosion behaviour and chemical stability of transparent hybrid sol-gel coatings deposited on aluminium in acidic and alkaline solutions, Prog. Org. Coat., 2018, vol. 124, p. 286. https://doi.org/10.1016/j.porgcoat.2018.02.025
Prabhu, D. and Padmalatha, R., Corrosion behaviour of 6063 aluminium alloy in acidic and in alkaline media, Arab. J. Chem., 2017, vol. 10, p. S2234. https://doi.org/10.1016/j.arabjc.2013.07.059
Van den Brand, J., Van Gils, S., Beentjes, P.C.J., Terryn, H., et al., Improving the adhesion between epoxy coatings and aluminium substrates, Prog. Org. Coat., 2004, vol. 51, no. 4, p. 339. https://doi.org/10.1016/j.porgcoat.2004.08.005
Feng, Z., Song, G., Xu, Y., Zheng, D., et al., Micro-galvanic corrosion during formation of epoxy coating, Prog. Org. Coat., 2020, vol. 147, id. 105799. https://doi.org/10.1016/j.porgcoat.2020.105799
Hu, Y., Yuan B., Cheng F., and Hu, X., NaOH etching and resin pre-coating treatments for stronger adhesive bonding between CFRP and aluminium alloy, Compos. Part B Eng., 2019, vol. 178, id. 107478. https://doi.org/10.1016/j.compositesb.2019.107478
Rossi, S., Calovi, M., and Fedel, M., Corrosion protection of aluminum foams by cataphoretic deposition of organic coatings, Prog. Org. Coat., 2017, vol. 109, p. 144.
Meis, N.N.A.H., Van der Ven, L.G.J., Van Benthem, R.A.T.M., and De With, G., Extreme wet adhesion of a novel epoxy-amine coating on aluminum alloy 2024-T3, Prog. Org. Coat., 2014, vol. 77, no. 1, p. 176. https://doi.org/10.1016/j.porgcoat.2013.09.001
Penna, M.O., Silva, A.A., do Rosário, F.F., De Souza Camargo, S., et al., Organophilic nano-alumina for superhydrophobic epoxy coatings, Mater. Chem. Phys., 2020, vol. 255, id. 123543. https://doi.org/10.1016/j.matchemphys.2020.123543
Anoop, V., Subramani, S., Jaisankar, S.N., Chakraborty, S., et al., Enhanced mechanical, thermal and adhesion properties of polysilsesquioxane spheres reinforced epoxy nanocomposite adhesives, J. Adhesion, 2021, vol. 97, p. 1. https://doi.org/10.1080/00218464.2019.1620107
Sharma, V., Sharma, V., Goyat, M.S., Hooda, A., et al., Recent progress in nano-oxides and CNTs based corrosion resistant superhydrophobic coatings: A critical review, Prog. Org. Coat., 2020, vol. 140, ID 105512. https://doi.org/10.1016/j.porgcoat.2019.105512
Jiang, M.-Y., Wu, L.,-K., Hu, J.-M. and Zhang, J.-Q., Silane-incorporated epoxy coatings on aluminum alloy (AA2024). Part 1: Improved corrosion performance, Corros. Sci., 2015, vol. 92, p. 118. https://doi.org/10.1016/j.corsci.2014.11.046
Ding, R., Chen, S., Lv, J., Zhang, W., et al., Study on graphene modified organic anti-corrosion coatings: A comprehensive review, J. Alloys Compd., 2019, vol. 806, p. 611. https://doi.org/10.1016/j.jallcom.2019.07.256
Kim, H. and Oh, J., Random array of inorganic nanoparticles on polymer surface for anti-biofouling property through cost-effective and high-performance dip-coating, Colloids Surf. B, 2020, vol. 188, ID 110788.
Sinturel, C., Vayer, M., Mahut, F., Bonnier, F., et al., Influence of PLGA nanoparticles on the deposition of model water-soluble biocompatible polymers by dip coating, Colloids Surf. A Physicochem. Eng. Asp., 2021, vol. 608, ID 125591. https://doi.org/10.1016/j.colsurfa.2020.125591
Ji, W.-G., Hu, J.-M., Liu, L., Zhang, J.Q., et al., Water uptake of epoxy coatings modified with c-APS silane monomer, Prog. Org. Coat., 2006, vol. 57, p. 439. https://doi.org/10.1016/j.porgcoat.2006.09.025
Peng, Z., Wang, C., Chen, L., and Chen, S., Peeling behavior of a viscoelastic thin-film on a rigid substrate, Int. J. Solids Struct., 2014, vol. 51, nos. 25–26, p. 4596. https://doi.org/10.1016/j.ijsolstr.2014.10.011
Chen, H., Feng, X., Huang, Yi., Huang, Yo., et al., Experiments and viscoelastic analysis of peel test with patterned strips for applications to transfer printing, J. Mech. Phys. Solids, 2013, vol. 61, no. 8, p. 1737. https://doi.org/10.1016/j.jmps.2013.04.001
Peng, Z.L., Wang, C., Yang, Y.Z., and Chen, S., Effect of relative humidity on the peeling behavior of a thin film on a rigid substrate, Phys. Rev. E, 2016, vol. 94, no. 3, ID 032801.
Pryor, M.J. and Keir, D.S., Galvanic corrosion. II. Effect of pH and dissolved oxygen concentration on the aluminum–steel couple, J. Electrochem. Soc., 1958, vol. 105, no. 11, p. 629. https://doi.org/10.1149/1.2428681
Funding
This research has been funded by the Shaanxi Province Key Research Fund, China, under the grant number 2019GY-157 and by a Wisteria Scientific Research Cooperation Special Project of Northwest University, China, which is hereby acknowledged.
Author information
Authors and Affiliations
Corresponding author
Ethics declarations
The authors declare that they have no conflicts of interest.
About this article
Cite this article
Ahsan Riaz Khan, Zheng, M., Cui, Y. et al. Protection Properties of Organosilane-Epoxy Coating on Al Alloy 6101 in Alkaline Solution. Surf. Engin. Appl.Electrochem. 58, 281–289 (2022). https://doi.org/10.3103/S1068375522030036
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.3103/S1068375522030036