Effect of Post-Treatments on Corrosion and Electrochemical Properties of Anodized Al 2024-T3 Alloy | ||||
| Journal of Petroleum and Mining Engineering | ||||
| Volume 25, Issue 1, August 2023, Page 11-18 PDF (2.16 MB) | ||||
| Document Type: Full-length article | ||||
| DOI: 10.21608/jpme.2023.195590.1155 | ||||
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| Authors | ||||
Ahmed Mohamed Wahba  1, 2; Mosaad Mohamed Sadawy1; mohammed kamal gouda 1; hassan metwaly 1; salah salman 1
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| 1Petroleum and Mining Engineering Dept. El Azhar university, Cairo, Egypt | ||||
| 2Sianco - Egyptian Co. for Appliances and Maintenance, Cairo, Egypt. | ||||
| Abstract | ||||
| Anodizing is one of the most widely used surface treatments for aluminum and its alloys. In this process, a decorative and protective film of aluminum oxide is formed on the aluminum surface using a direct current electrical supply. In this research, anodizing in sulfuric acid followed by sealing in hot water, ammonium acetate and bichromate salt was performed to Al 2024-T3 alloy. Scanning electronic microscopy (SEM) / energy-dispersive X-ray spectroscopy unit (EDS), X-ray diffraction (XRD) and group of electrochemical technics were used to study the morphology and the electrochemical behavior of the specimens. The results showed that the sealing post-treatment decreased the cracks and sealed the pores on the anodic film surface to some extent depending on the sealing method. When Al 2024-T3 alloy sealed with bichromate, the surface became smoother and more crack-free than the other samples. Further, the corrosion properties showed a substantial improvement in the anti-corrosion properties of bichromate sealing compared to the anodized 2024 Al alloy with and without sealing in hot water and ammonium acetate solution. | ||||
| Keywords | ||||
| Aluminum; Anodizing; Sealing; Pitting | ||||
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