TY - JOUR AU - García-Heras, M. AU - González-Mena, E. AU - Villegas, M. A. PY - 2004/04/30 Y2 - 2024/03/28 TI - Superficial modification of aluminium-base alloys (anodising and non-anodising) by silica coating JF - Revista de Metalurgia JA - Rev. metal. VL - 40 IS - 2 SE - Articles DO - 10.3989/revmetalm.2004.v40.i2.253 UR - https://revistademetalurgia.revistas.csic.es/index.php/revistademetalurgia/article/view/253 SP - 127-131 AB - Transparent and colourless silica coatings were deposited on anodising and non-anodising substrates of aluminium-base alloys (series 6063). Coatings were prepared by soLgel (dipping method) from a silica alkoxide and a mixture of both silica alkoxide and silica alkylalkoxide. Preparations were optimised from viscosity, density, surface tension, and contact angle measurements. Densification was carried out at 60 and 120 °C. Reflectance attenuation of coated samples was analysed by UV-VIS-NIR spectroscopy. The results indicated that -10 % of attenuation is reached. Durability and resistance against degradation tests of the metal/coating system were undertaken by immersion into aqueous solutions. Electrochemical impedance measurements and potential corrosion of the metallic substrate for variable times were performed. ER -