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Anodic Oxide Coatings on Aluminium Resistant to Strong Alkali Environment

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Języki publikacji
EN
Abstrakty
EN
The aim of this paper was to test currently available on the market products for sealing anodic oxide coatings as well as to test the use of other alternative substances improving the sealing process. The ability to seal in 10 different solutions and the quality of the seal has been tested. The influence of the applied preparations on corrosion resistance and resistance to strongly alkaline environment was also investigated. Based on the results obtained, satisfactory results were archived for the sample sealed in a IMN-OML (Institute of Non-Ferrous Metals in Gliwice, Light Metals Division) solution sealant and in solution of nickel acetate in a medium-temperature process. Sealing by means of nickel acetate solutions is economically justified, and its use allows the process temperature to be lowered. When it comes to resistance to alkalis, samples sealed in IMN-OML sealant are the best. Commercial solutions have also achieved positive results in all tests.
Twórcy
autor
  • Institute of Non-Ferrous Metals in Gliwice, Light Metals Division in Skawina (IMN OML) 19 Piłsudskiego Str., 32-050 Skawina, Poland
autor
  • Institute of Non-Ferrous Metals in Gliwice, Light Metals Division in Skawina (IMN OML) 19 Piłsudskiego Str., 32-050 Skawina, Poland
autor
  • Institute of Non-Ferrous Metals in Gliwice, Light Metals Division in Skawina (IMN OML) 19 Piłsudskiego Str., 32-050 Skawina, Poland
autor
  • AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, Poland
  • AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, Poland
autor
  • Albatros Aluminium Sp. z o.o., Zakład Produkcyjny 36 Południowa Street, 78-600 Wałcz, Poland
Bibliografia
  • [1] W. Liu, Y. Zuo, S. Chen, X. Zhao, J. Zhao, The effect of sealing on cracking tendency of anodic films on 2024 aluminium alloy after heating up to 300°C, Surface & Coating Technology 203, 1244-1251 (2009).
  • [2] J. Lee, U. Jung, W. Kim, W. Chung, Effects of residual water in the pores of aluminium anodic oxide layers prior to sealing on corrosion resistance, Applied Surface Science 283, 941-946 (2013).
  • [3] V. Lopez, J. A. Gonzalez, A. Bautista, E. Otero, R. Lizarbe, The response of anodized materials sealed in acetate-containing baths to atmospheric exposure, Corrosion Science 40, 4/5, 693-704 (1998).
  • [4] M. R. Kalantary, D. R. Gabe, D. H. Ross, A model for the mechanism of nickel fluoride cold sealing of anodized aluminium, Journal of Applied Electrochemistry 22, 268-276 (1922).
  • [5] M. Rezai-Kalantary, Development of cold sealing processes for anodized aluminium, Praca doktorska, 1990.
  • [6] F. Mansfeld, C. Chen, C. B. Breslin, D. Dull, Sealing of Anodized Aluminium Alloys with Rare Earth Metal Salt Solutions, J. Electrochem. Soc. 145, 8 (1998).
  • [7] P. Kwolek, P. Górecka, A. Obłój, U. Kwolek, K. Dychtoń, M. Drajcewicz, J. Sieniawski, The Teflon impregnation of anodic coating onto aluminium substrate, Chemik 70, 7, 361-368 (2016).
  • [8] M. Zemanowa, M. Chovancova, New Approaches for Sealing Anodic Coatings - Aluminium substrates can be sealed with sol-gel method after anodic oxidation in sulfuric acid, Aluminium anodizing compendium, www.metalfinishing.com, October 2005.
  • [9] J. A. Gonzalez, M. Morcillo, E. Escudero, V. Lopez, E. Otero, Atmospheric corrosion of bare and anodized aluminium in a wide range of environmental conditions. Part I: Visual observation and gravimetric results, Surface and Coatings Technology 153, 225-234 (2002).
  • [10] B. Rachel Cheng, L. Hao, Comparative Study of the Effects of Sealing Processes on the Wear Resistance an Sealing Quality of Hard Anodic Coatings, Metal Finishing 98, 48-55 (2000).
  • [11] L. Hao, B. R. Cheng, Sealing Processes of Anodic Coatings - Past, Present and Future.
  • [12] PN-EN ISO 2931:2010 Anodizing of aluminium and its alloys - Assessment of quality of sealed anodic oxidation coatings by measurement of admittance.
  • [13] PN-EN ISO 2143:2010 "Anodizing of aluminium and its alloys - Estimation of loss of absorptive power of anodic oxidation coatings after sealing - Dye-spot test with prior acid treatment”.
  • [14] PN-EN ISO 3210:2010 "Anodizing of aluminium and its alloys - Assesment of quality of sealed anodic oxidation coating by measurement of the loss of mass after immersion in phosphoric acid/chromic acid solution”.
  • [15] GMW 14665 "Anodic Oxidation Coating on Aluminum”.
  • [16] Y. Shang, L. Wang, Z. Liu, D. Niu, Y. Wang, Ch. Liu, The effects of different sealing techniques for anodic film of Al.-12.7Si-0.7Mg Alloys, Int. J. Electrochem. Sci. 11, 5234-5344 (2016).
  • [17] B. A. Manavbasi, K. Bodily, T. Clarke, K. Johnson, B. Estes, Alkaline Corrosion-Resistant Sealant for Anodized Aluminium Alloys, Technically speaking, www.metalfinishing.com, November/December 2013.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-2bc0fd0f-e5f7-49f3-88e5-77fc2316bfb4
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