STRUCTURAL CHARACTERIZATION OF WELDED AL6060-T5 ALLOY JOINTS BY FRICTION STIR SPOT WELDING UNDER CORROSION ATACK

• Autor(a) principal: Costa de Oliveira, Ana Cláudia
• Data de Publicação: 2025
• Outros Autores: Noronha dos Santos , Hortencia, Paiva Oliveira Leite Dyer , Paulo, Silva, Silvelene Alessandra, Dick Zilnyk , Kahl, da Silva, Maria Margareth, de Vasconcelos, Getúlio, de Souza Rosendo, Tonilson
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Revista UniVap (online)
• Texto Completo: https://revista.univap.br/index.php/revistaunivap/article/view/4567
• topic: Aluminum Alloy Al6060-T5; corrosion resistance; friction welding; FSSW; immersion corrosion; Welding; Aluminum Alloys; Liga de Alumínio Al6060-T5; resistência à corrosão; soldagem por fricção; FSSW; corrosão por imersão; Soldagem; Ligas de Alumínio; Aleación de aluminio Al6060-T5; resistencia a la corrosión; soldadura por fricción; FSSW; corrosión por inmersión; Soldadura; Aleaciones de aluminio

Al6060-T5 alloys are widely used in the aerospace, shipbuilding and automotive industries. Nevertheless, the conventional welding process could be weakening its resistance to corrosion.  Thus, Friction Stir Spot Welding (FSSW) becomes an alternative to reduce the thermally affected zone (HAZ) at the joints. Although, persist a lack of studies, on current literature, about these welding properties; as welds its corrosion resistance. With this in mind, this present paper evaluated an Al6060-T5 alloy plates welds after periods of 336, 672 and 1008 hours into 3.5% NaCl electrolyte immersion. Where, for each period, the plates were evaluated in terms of open circuit potentials (OCP), micro hardness Vickers, elemental composition and its corrosion severity. The results shown a percentage increasing of oxygen rate (3 to 4%); identifying corrosive activity in the mixing zone. Likewise, electrochemical tests shown a greater susceptibility to corrosion at weld nearing centre regions; due to Mg and Si precipitates presence. Even so, all immersion times samples presented a mild corrosive severity