Abstract: The invention relates to a method for manufacturing an aluminum alloy sheet, wherein an aluminum alloy is prepared with the following composition, in wt %: Mg: 4.0-5.2, Mn: 0.40-1.0, Zn: 0.15-0.40, at least one element selected from Ti, Cr, Cu and Zr, the content of the element, if selected, being 0.01-0.15 for Ti, 0.05-0.25 for Cr, 0.02-0.25 for Cu, 0.05-0.25 for Zr, Fe: <0.40, Si: <0.40, other elements or impurities<0.05 each and<0.15 in total, the remainder being aluminum. A rolling plate is cast by vertical semi-continuous casting, and said optionally homogenised plate is hot-rolled in two successive stages to obtain a sheet. The sheets obtained by the method according to the invention are advantageous, in particular for shipbuilding, since they demonstrate, after being exposed for 7 days to a temperature of 100° C., a weight loss of less than 15 mg/cm2 during a corrosion test according to the ASTM G67 standard.

Abstract: A method for manufacturing a brushed rolled product made from Al—Cu—Li alloy with a thickness of less than 12 mm, including the steps of producing a rolled product, solution heat treatment and quenching, stress relieving, optionally tempering, and brushing, wherein the brushing tool applies a force to the rolled product generating residual compressive stresses at the surface of the brushed product; eliminates a thickness of at least 9 ?m from the surface of the non-brushed rolled product; wherein the brushing step comprises at least one circular brushing motion. The rolled product obtained by the method according to the invention is advantageous. The use of such a product in an aircraft fuselage panel is advantageous.

Abstract: The invention relates to a vacuum chamber element obtained by machining and surface treatment of a plate of thickness at least equal to 10 mm of aluminum alloy, composed as follows (as a percentage by weight), Si: 0.4-0.7; Mg: 0.4-0.7; Ti 0.01-<0.15, Fe<0.25; Cu<0.04; Mn<0.4; Cr 0.01-<0.1; Zn<0.04; other elements <0.05 each and <0.15 in total, the rest aluminum. The invention also relates to a manufacturing method for a vacuum chamber element wherein successively a plate with a thickness of at least 10 mm of aluminum alloy of series 5XXX or series 6XXX is provided, said plate is machined to a vacuum chamber element, said element is degreased and/or pickled, it is anodized at a temperature of between 10 and 30° C. with a solution comprising 100 to 300 g/l of sulfuric acid and 10 to 30 g/l of oxalic acid and 5 to 30 g/l of at least one polyol, optionally the anodized product is hydrated in deionized water at a temperature of at least 98° C. preferably for a period of at least about 1 h.