Abstract: Non-destructive method for detecting zones with non-conductive materials, such as materials that include glass fibers, in a part made of a conductive composite, such as a composite whose reinforcing fibers are carbon fibers, provided with an organic coating, that includes the following stages: a) providing a device for applying an electric potential on the surface of said part; b) determining the dielectric breakdown potential Pr corresponding to the thickness E of the coating; c) applying said dielectric breakdown potential Pr with said device to the part for the purpose of identifying those zones that have non-conductive materials when dielectric breakdown does not occur in them.

Abstract: Non-destructive method for detecting zones with non-conductive materials, such as materials that include glass fibres, in a part made of a conductive composite, such as a composite whose reinforcing fibres are carbon fibres, provided with an organic coating, that comprises the following stages: a) providing a device for applying an electric potential on the surface of said part; b) determining the dielectric breakdown potential Pr corresponding to the thickness E of the coating; c) applying said dielectric breakdown potential Pr with said device to the part for the purpose of identifying those zones that have non-conductive materials when dielectric breakdown does not occur in them.

Abstract: This invention refers to a procedure for anodising aluminium or aluminium alloys in which an aluminium or an aluminium alloy part is submerged an in an aqueous solution at a temperature between 0° C. and 140° C., preferably between 0° C. and 130° C., in which said solution includes: sulphuric acid, tartaric acid, and at least one inorganic salt of an element selected between at least one transition metal, a lanthanide element, an actinide, and combinations of them, and applying a controlled potential difference, obtaining layers of aluminium oxide with properties as good as or even better than those obtained through anodising in traditional chromic acid solutions.