As references for use in trouble shooting concerning industrial aluminum products, depth profiles of typical surfaces of diverse specimens obtained using an Auger electron spectrometer furnished with an argon sputter ion gun are presented. The data consist of depth profiles of a (1) surface frozen during exposure to air, (2) surface frozen while in contact with an iron mould, (3) water cooled surface, (4) rolled surface, (5) weathered surface, (6) extrusion surface, (7) chromated surface, (8) anodized surface and a (9) lathed surface. The following is on the whole noteworthy : (A) Thicknesses of oxide films are very small : 8 nm for sample (1), 50 nm for sample (3). This is not expected to result from the susceptibility a corrosion of aluminum. (B) The industrially produced surfaces show little contamination. Contaminants do not completely cover even the surface of sample (4). (C) Magnesium tends to segregate in the oxide films.