Effect of cerium addition to a hydrothermal treatment on the corrosion protection of the tartaric-sulfuric acid anodized AA2524-T3
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To protect Al alloys from corrosion, standard procedures in the aerospace industry use chromium-based acid anodizing with subsequent
post-treatment steps also containing hexavalent chromium (Cr(VI)) ions. However, environmental and health related concerns associated with
Cr(VI) have encouraged the search for new surface treatments providing effective corrosion protection without the drawback of generating
toxic residues. In this investigation, a hydrothermal treatment in aqueous solution with cerium ions is proposed as a post-treatment for
tartaric-sulfuric acid (TSA) anodizing, and its effects on the AA2524-T3 alloy corrosion resistance investigated. The effect of Ce on the
characteristics of the surface film formed, such as morphology and corrosion resistance, is investigated by scanning electron microscopy and
electrochemical impedance spectroscopy (EIS). The results show that the hydrothermal treatment in solution containing Ce(III) ions presents
a less stable behavior than the treatment in boiling water. However, the results of the EIS experiments show recovery of the protective
properties of the system, indicating that some self-healing properties must be imparted to the system.
Como referenciar
TERADA, MAYSA; QUEIROZ, FERNANDA M.; COSTENARO, HELEN; AYUSSO, VICTOR H.; OLIVIER, MARJORIE; COSTA, ISOLDA; MELO, HERCILIO G. de. Effect of cerium addition to a hydrothermal treatment on the corrosion protection of the tartaric-sulfuric acid anodized AA2524-T3. Corrosion, v. 75, n. 9, p. 1110-1117, 2019. DOI: 10.5006/3063. Disponível em: http://repositorio.ipen.br/handle/123456789/30829. Acesso em: 30 Dec 2025.
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