EVALUACIÓN DE LA RESISTENCIA A LA CORROSIÓN DE ALEACIONES DE ALUMINIO AA 6063 Y AA 8011 ANODIZADAS, UTILIZANDO DIFERENTES MÉTODOS DE SELLADO

The process used industrially to achieve the format ion of a thick protective layer of aluminum is known as anodizing, which is growing in a controlle d manner, with current and constant anodic potentia l a layer of Al 2O3 on aluminum or its alloys. Anodizing is carried ou t after the sealing stage, which aims to seal the m outh of the pores of the anodic layer, with the traditio nal method of dipping the specimen in boiling water . This work was to obtain an anodic layer in 24 specimens, 12 o f AA-6063 alloy and 12 of AA-8011 alloy, which are anodized in sulfuric acid, being then stained and s ealed with three different methods, 8 specimens in distilled water to a boil, 8 in aqueous solution of triethano lamine and 8 in aqueous solution of sodium acetate. The results determined that the greatest thicknesses are presen ted in the AA-6063 specimens sealed in boiling dist illed water. Subsequently, half of the specimens were sub jected to a corrosion test by total immersion in sy nthetic sea water, resulting in that the samples sealed in sodi um acetate solution exhibited a lower corrosion rat e compared to other methods sealed and that the alloy AA-6063 had a lower corrosion rate compared to those of the alloy AA-8011.