This application relates to a method for forming an enclosure for a portable electronic device, the enclosure including a metal substrate that is overlaid by an anodized layer. The method includes dyeing the anodized layer by exposing pores of the anodized layer to a dye. The method further includes sealing the dye within the pores by exposing the anodized layer to a zinc-based sealing solution, where an external surface of the anodized layer having the pores that are sealed includes an amount of zinc between about 3 wt % to about 6 wt %.

Disclosed is a method of sealing an anodization layer including contacting the anodization layer with a solution at a temperature greater than freezing and less than 160° F. wherein the solution comprises graphene particles and a corrosion inhibitor.

The invention relates to a method of processing of materials using a moving interface, the method comprising: providing a working material, the working material comprising a substrate with a metallic film on at least one side of the substrate; providing an energy source adjacent to the working material, where the energy source is electrical current between a cathode and the working material as an anode; providing for relative controlled movement between the working material and the energy source, where the relative controlled movement is a motor attached to the working material via a linkage; activating the energy source such that the energy processes the working material; moving the energy source and/or the working material relative to the other to control the amount of processing of the working material achieved by the energy, where the processing of the working material is anodization; immersing the working material at a controlled speed into an anodizing bath equipped with a cathode; starting anodization of the metallic film at the edge of the metallic film furthest from the anode connection and just below the anodization bath, and immersing the working material into the bath such that the anodization is moved up the metallic film towards the edge nearest the anode connection, resulting in a complete conversion to oxide, except for a non-anodized small metal or conductive edge where the anode voltage is connected to the workpiece.

Examples of a susceptor for supporting a substrate includes a base metal formed of aluminum or a material containing aluminum, an anodized layer covering a surface of the base metal and having cracks therein, and a CF coating of polymer provided in the cracks such that the exposure of the base metal is avoided.

A process includes means for depositing an anti-corrosion coating filled with liquid oil on an aluminum substrate. Aluminum is anodized and then treated with a thin hydrophobic sub-coating. The pores created through anodization are then impregnated with liquid oil. Oil penetration is maximized and residual air is minimized by first filling the pores with a filling solution, replacing the filling solution with an exchange fluid, and then replacing the exchange fluid with perfluorinated oil. The oil gives the surface coating anti-wetting properties and self-healing properties, thereby protecting the aluminum substrate underneath from corrosion.

Colored oxide coatings having multiple oxide layers are described. Processes for forming the multilayer oxide coating can include converting a portion of a metal substrate to a primary oxide layer, coloring the primary oxide layer, and depositing a secondary oxide layer on the primary oxide layer. The primary oxide layer and the secondary oxide layer can be at least partially transparent such that a texture of an underlying metal substrate surface is visible through the multilayer oxide coating. A top surface of the secondary oxide layer can be polished to a high gloss to give the multilayer oxide coating an appearance of depth.

The disclosure relates to thin layers comprising a catechol containing polymer or oligomer, as well as methods of making and using the thin layers comprising the catechol containing polymer or oligomer. The layers demonstrate improved adhesion between two materials without substantial modification of the adhesive matrix.

Disclosed is a method of providing corrosion protection to an anodized metal including providing a metal having an anodization layer wherein the anodization layer includes a barrier portion; contacting the anodization layer with a first solution at a first temperature to seal the barrier portion; and contacting the anodization layer with the sealed barrier portion with a second solution at a second temperature to deposit a precipitated rare earth compound in the anodization layer with the sealed barrier portion; wherein the first solution includes a transition metal oxyanion and has a pH of 3 to 6 and the second solution includes a trivalent rare earth cation.

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.

According to various embodiments, a method for manufacturing a metal housing can be provided, comprising: a step of forming a metal base made of a metal material; a step of pretreating the surface of the metal base such that the surface has a predetermined gloss and flatness; an anodizing step of forming a predetermined oxide film on the flat surface of the metal base; a step of coloring the oxide film by using a colorant having a desired color; a sealing step for maintaining the performance and characteristics of the colorant on the colored oxide film; and a step of laminating at least one deposition layer on the upper part of the sealed oxide film.