An oxidation apparatus of planar metal surfaces, comprises: a tank within which the planar metal surface being treated is laid; an electrical power supply circuit with the two heads of the electrical power supply of the circuit placed in contact with electrodes with high electrical conductivity; a first planar electrode is placed below the metal surface being treated on a bottom of the aforementioned tank; an electrolyte is placed in the tank to close the electrolytic oxidation circuit; a second electrode is placed sliding and spaced on the planar metal surface under treatment in an immersed position at the level of the electrolyte in the tank; and it has the second electrode constituted by a conductive roller placed so as to roll on the planar metal surface being treated, avoiding contact between the cylindrical surface of the roller electrode and the planar metal surface being treated by means of the interposition of a permeable spacer element; the permeable spacer element is made of material resistant to the electrolytic action of oxidation and at least placed on one of the two surfaces, the cylindrical one of the roller electrode or the planar metallic one being treated, neither of which must come into contact.

This application relates to an enclosure for a portable electronic device. The enclosure includes a titanium substrate having a textured surface that includes randomly distributed peaks separated from each other by valleys, where tops of the peaks are separated from bottoms of the valleys by at least a minimum separation distance such that the textured surface is characterized as having an Sq (root mean square height) that is greater than 0.3 micrometers.

An electronic device is provided. The electronic device includes a housing comprising a first surface opened while facing a first direction, a second surface facing a second direction that is opposite to the first direction, and one or more side parts disposed in different directions between the first surface and the second surface, a nonconductive structure disposed along at least a portion of the at least one side wall within the housing, and one or more stop recesses including at least one recess formed on one surface of the one or more side parts and a portion of the nonconductive structure surrounding a peripheral portion of the at least one recess.

In a method for producing a power converter, a surface or at least part of the surface of at least two aluminum busbars is subjected to an anodizing treatment to color the surface with at least one specifiable color, and a cold gas coating is applied on a first part of the surface to produce a contact surface.

A method of anodizing an article of aluminum or aluminum alloy for forming a porous anodic oxide coating comprises an immersion step of immersing the article to be anodized in an electrolyte in a tank, wherein the electrolyte comprises an aqueous solution of 5-50 g/l sulphuric acid and 2-50 g/l phosphoric acid, and arranging the article as an anode with respect to one or more counter electrodes as arranged cathodes in the electrolyte, and an anodizing step of applying a positive anode voltage Va to the article, while the temperature of the electrolyte is in the range of 33-60° C.

In various embodiments, bilayers are formed in electronic devices at least in part by anodization of metal-alloy base layers.

The present disclosure is drawn to covers for electronic devices. In one example, a cover for an electronic device can include a light metal substrate including a first surface. A first micro-arc oxidation layer may be on the first surface of the light metal substrate, the first micro-arc oxidation layer can include a cationic dye bonded to the first surface via an anionic inorganic bridging compound.

An improved thin film optical interference apparatus, methods of use and of manufacture are provided, the apparatus comprising means for generating optical interference colours directly on the surface of a single layer of anodized metal. The interference colours generated by the presently improved apparatus can be used to indicate the presence of at least one organic compound or analyte.

Subjecting an aluminum or aluminum alloy substrate to anti-corrosion and anti-wear treatment that is applicable in particular in the field of aviation for protecting certain mechanical parts of airplanes or helicopters that are subjected simultaneously to corrosion and to wear, including applying to the substrate, a sol-gel treatment step forming a sol-gel layer; and after the sol-gel treatment step, a hard oxidation step forming a hard oxide layer.

A porous region structure and a method of fabrication thereof are disclosed. The porous region structure is characterized by having a hard mask interface region with non-uniform pores sealed and thereby excluded functionally from the structure. The sealing of the hard mask interface region is done using a hard mask deposited on top of an anodization hard mask used to define the porous region of the structure. By excluding the hard mask interface region, the porosity ratio and the equivalent specific surface of the porous region structure can be controlled or quantified with higher accuracy. Corrosion due to exposure of an underlying metal layer of the structure is also significantly reduced by sealing the hard mask interface region.