EFFECT OF VOLTAGE ON THE THICKNESS OF OXIDE LAYER AT ALUMINUM ALLOYS FOR STRUCTURAL BONDING USING PHOSPHORIC SULFURIC ACID ANODIZING (PSA) PROCESS
DOI:
https://doi.org/10.21776/MECHTA.2023.004.01.8Keywords:
Aluminum, Anodization, Structural Bonding, Phosphoric Sulfuric Acid AnodizingAbstract
The aerospace industry mostly uses the aluminum alloys 2xxx and 7xxx series for their fuselage construction, and some of them are assembled using structural bonding because it is strong, easy during the fabrication process, resistant to corrosion, and non-toxic. The anodization process is a proven surface treatment method for structural bonding. Phosphoric Sulfuric Acid Anodizing (PSA) is an eco-friendly alternative as a chromate-free solvent technology for the anodizing process that is applied for structural bonding. The thickness of the oxide layer caused by the voltage given in this process was evaluated in terms of corrosion resistance using the oxide layer's thickness as the main factor. The PSA process of AA2024 T3 clad was carried out at a constant concentration of 125 g/L of phosphoric acid, 80 g/L of sulfuric acid, 27 A, and a temperature of 26 to 28 OC for 23 minutes with various voltages. The voltage was varied at 16, 18, and 20 VDC. The optimum condition for the voltage applied was 18 VDC, which resulted in an oxide layer thickness of 2.76 µm.
References
AHMAD, ZAKI. 2006. Principles of Corrosion Engineering and Corrosion Control. Butterworth-Heinemann, eBook ISBN: 9780080480336.
VERDAGUER, DOLORS SOLÉ. 2015. Alternative surface treatments without chromium content in aeronautical aluminium alloys: Tartaric sulfuric acid. Thesis of a Master of Science Degree in Aerospace Engineering at Técnico Lisboa
MUBAROK M. ZAKI et al., 2015, "Anodization of Al 2024 T3 Alloy with Pulse Current Method in Tartaric-Sulfuric Acid (TSA) Solution," Metallurgy Magazine (pp. 3:161–170), BANDUNG: INSTITUT TEKNOLOGI BANDUNG.
HIGGINS, A, 2000, Adhesive Bonding of Aircraft Structures, International Journal of Adhesion & Adhesives 20 (pp. 367–376), UK: British Aerospace Regional Aircraft, https://doi.org/10.1016/S0143-7496(00)00006-3.
BISHOPP, JOHN. 2005. Aerospace: A Pioneer in Structural Adhesive Bonding, Chapter 5, Handbook of Adhesives and Sealants.
DAVIS, JR. ALLOYING, 2001, Understanding the Basics of Aluminum and Alloys (pp. 351-416), USA: ASM International, ISBN: 978-0-87170-744-4
CRITCHLOW et al. 2006, Strategies for Replacement of Chromic Acid Anodising for the Structural Bonding of Aluminium Alloys (pp. 419–453), International Journal of Adhesion & Adhesives 26, DOI: 10.1016/j.ijadhadh.2005.07.001
PARK et al., 2010, "Recent Trends in Surface Treatment Technologies for Airframe Adhesive Bonding Processing: A Review (1995-2008)" (pp. 192-221), The Journal of Adhesion 86:2, Korea.
KWAKERNAAK, A. et al. 2012, Improvements in Bonding Metals for Aerospace and Other Applications. Netherlands: Delft University of Technology
CANNING, W. 1982. The Canning Handbook: Surface Finishing Technology, Integrated Design. Springer Netherlands.
PEREZ, NESTOR, 2004, Electrochemistry and Corrosion Science (p. 210), Boston: Kluwer Academic Publisher.
VIADEMONTE et al., 2020, "A Review on Anodizing of Aerospace Aluminum Alloys for Corrosion Protection and Coatings"
SULKA, GRZEGORZ D., 2008, Nanostructured Materilas in Electrochemistry, Chapter 1 "Highly Ordered Anodic Porous Alumina Formation by Self-Organized Anodizing" (pp. 1-116), Weinheim: Wiley-VCH Verlag GmbH & Co. KgaA.
PRAWIRA et al., 2011, Pengaruh Beberapa Parameter Proses Anodisasi Pada Paduan Aluminium 2618 dan 7175 Terhadap Ketebalan Lapisan Oksida dan Ketahanannya Terhadap Korosi," Prosiding Seminar Material Metalurgi (pp. 481-494), Bandung: Institut Teknologi Bandung.
GAZAPO, JOSE L. AND J. GEA, 1994, "Anodizing of Aluminum: The Anodizing Process," TALAT Lecture 5203.
SETIANTO, M. H., and AKHMAD A. KORDA, "Characterization of Tartaric-Sulphuric Acid Anodized 2024-T3 Aluminium Alloys with Anodizing Potential Variation," Journal of Physics: Conference Series 1204 012039, Bandung: Institut Teknologi Bandung, https://doi.org/10.1088/1742-6596/1204/1/012039
DAPKUNAS, STANLEY J., 2005, Surface Engineering Measurement Standards for Inorganic Materials. National Institute of Standards and Technology
ZARASKA, LESZEK et al., 2011, "Anodic alumina membranes with defined pore diameters and thicknesses obtained by adjusting the anodizing duration and pore opening/widening time" (pp. 2427–2436), J Solid State Electrochem, DOI: 10.1007/s10008-011-1471-z
ONO, SACHIKO DAN NOBORU MASUKO, 2003, Evaluation of Pore Diameter of Anodic Porous Films Formed on Aluminum, Surface and Coatings Technology (pp. 169–170 and 139–142). Tokyo: Kogakuin University.
PUT, MARLOES VAN, 2013, Potentiodynamic Anodizing and Adhesive Bonding of Aluminum for the Aerospace Industry, Delft University of Technology.
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Copyright (c) 2023 Harita N Chamidy, Agustinus Ngatin, Anisa Fitriani Rosyadi, Arisya Julviana, Noviyani Noviyani
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