Abstract

PAREDES DUGARTE, Solange; HIDALGO PRADA, Benjamín; AVILA GODOY, Rosario  and  BRICENO VALERO, Mauro. STUDY BY INTERFEROMETRY AND SCANNING ELECTRON MICROSCOPY OF THE CORROSION OF A COMMERCIAL ALUMINUM ALLOY IN SALINE ENVIRONMENT. INCI [online]. 2008, vol.33, n.7, pp.542-546. ISSN 0378-1844.

Scanning white light interferometry (SWLI) and scanning electron microscopy (SEM) were used to examine and evaluate the surface of commercial 3003 aluminum alloy samples, corroded by pitting in a saline fog atmosphere. From the comparison of the two evaluation techniques it was appreciated that while the SWLI provides quantitative information about the depth of the attack, the SEM permits detailed observation of the damage that takes place in the matrix due to the corrosion process. Furthermore, the evaluation by MEB made it possible to establish the role of the second phase intermetallic particles in the formation of galvanic micro cells intermetallics/matrix, responsible for the pitting attack of the commercial aluminum alloy 3003 in saline environment

Keywords : Aluminio 3003 ; Corrosión por Picadura ; Interferometría; Microscopía Electrónica de Barrido.