Modificación superficial de aleaciones de base aluminio (anodizadas y no anodizadas) mediante recubrimientos de sílice

M. García-Heras; E. González-Mena; M. A. Villegas

doi:10.3989/revmetalm.2004.v40.i2.253

Superficial modification of aluminium-base alloys (anodising and non-anodising) by silica coating

Authors

M. García-Heras Centro Nacional de Investigaciones Metalúrgicas, CENIM, CSIC
E. González-Mena Escuela de Ingeniería Metalúrgica y Ciencia de los Materiales, Facultad de Ingeniería. Univ. Central de Venezuela
M. A. Villegas Centro Nacional de Investigaciones Metalúrgicas, CENIM, CSIC

DOI:

https://doi.org/10.3989/revmetalm.2004.v40.i2.253

Keywords:

coatings, superficial modification, reflectance, durability, sol-gel

Abstract

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.

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Published

2004-04-30

How to Cite

García-Heras, M., González-Mena, E., & Villegas, M. A. (2004). Superficial modification of aluminium-base alloys (anodising and non-anodising) by silica coating. Revista De Metalurgia, 40(2), 127–131. https://doi.org/10.3989/revmetalm.2004.v40.i2.253

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Issue

Vol. 40 No. 2 (2004)

Section

Articles

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