Resumen:
The durability of EN AW 6082-T651 aluminium alloy joints bonded with a toughened acrylic adhesive was investigated upon exposure to wet environments (humidity, water immersion and salt water immersion). Environmentally-friendly surface treatments were used to avoid hexavalent chromium. Single lap shear tests were used to determine the durability of the adhesively bonded joints. Specimens were exposed to 31% and 95% relative humidity and submerged in deionized water and 3 wt% sodium chloride solution at 25°C and 50°C, for 10, 30 and 90 days. The data collected in the experiments showed that the durability was higher for surfaces treated with ?-methacryloxypropyltrimethoxysilane (?-MPS) and sulfo-ferric etchant (P2 etch) than other surface treatments. Both these treatments improved considerably the durability in all environments tested. The results indicate that specimens even without surface treatment maintained a significant residual strength after exposure to low humidity environment (room temperature at 31% RH). The joints exposed to a high humidity environment showed a higher reduction in adhesive strength than those immersed in deionized water and saline solution.
Palabras Clave: Acrylic adhesives; water effects; aluminium joints; surface treatment; silane; p2 etch;
Índice de impacto JCR y cuartil WoS: 0,868 (2006); 2,700 - Q2 (2023)
Referencia DOI:
https://doi.org/10.1163/156856106779116614
Publicado en papel: 2006.
Cita:
J.C. del Real-Romero, M. Cano, J. Abenojar, M.A. Martínez, Adhesive bonding of aluminium with structural acrylic adhesives: durability in wet environments. Journal of Adhesion Science and Technology. Vol. 20, nº. 16, pp. 1801 - 1818, 2006.
