Colored, corrosion-resistant aluminum alloy substrates and methods for producing same
a technology of aluminum alloy and color, applied in the field of aluminum alloy treatment, can solve the problems of limited color selection, corrosion and wear resistance of anodized substrates, and protective compounds applied to anodized surfaces that give rise to other limitations
Inactive Publication Date: 2014-09-18
ARCONIC INC
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Benefits of technology
The present disclosure describes treatments for aluminum alloys, specifically for objects with a porous oxide layer. The treatment involves applying a liquid containing a silicon monomer to the object and allowing the monomer to infiltrate the oxide layer and polymerize there to bond with the oxide layer and pigment particles. The pigment can be titanium dioxide, which acts as a colorant, and can enter the pores of the oxide layer. A corrosion inhibitor can also be added to the liquid. The treatment results in a layer of silicon-containing polymer that is interlocked with the oxide layer and has the pigment particles fixed in it. This results in a durable and color-imparted coating on the aluminum alloy object. The method can be used on wheels and other objects formed from various aluminum alloys.
Problems solved by technology
Conventional anodizing processes, resultant anodized substrates and coloring techniques have limitations with respect to corrosion and wear resistance and color selection.
Some protective compounds applied to the anodized surfaces give rise to other limitations.
Method used
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[0031]Reference is now made to the accompanying drawings, which assist in illustrating various features of the instant application. In one approach, the instant application relates to aluminum alloys having a sulfate-phosphate oxide zone. One embodiment of an aluminum alloy having a sulfate-phosphate oxide zone is illustrated in FIG. 1. In the illustrated embodiment, an aluminum alloy base 10 includes a sulfate-phosphate oxide zone 20. In general, and as described in further detail below, the aluminum alloy base 10 may be modified with a mixed electrolyte (e.g., sulfuric acid plus phosphoric acid) to produce the sulfate-phosphate oxide zone 20 (indicated by shading lines slanting downwardly from left to right). The sulfate-phosphate oxide zone 20 may promote, among other things, adhesion of polymers to the aluminum alloy base 10, as described in further detail below.
[0032]The aluminum alloy base 10 may be any material adapted to have a sulfate-phosphate oxide zone formed therein via...
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Abstract
A silicon polymer treatment with included pigments for anodized aluminum objects such as wheels. Titanium dioxide may be dispersed in polysiloxane or polysilazane to form a white polymer treatment on the object. Other beneficial components, such as corrosion inhibitors may be included in the polymer matrix.
Description
BACKGROUND[0001]Metallic substrates, including aluminum and aluminum alloys, may be anodized to increase corrosion and wear resistance of the substrate. Anodizing is an electrolytic passivation process used to increase the thickness and density of the natural oxide layer on the surface of metal parts. Anodic films can also be used for a number of cosmetic effects, either via thick porous coatings that can absorb dyes or via thin transparent coatings that add interference effects to reflected light. Anodic films are generally stronger and more adherent than most paints and platings, making them less likely to crack and peel. Anodic films are most commonly applied to protect aluminum alloys, although processes also exist for titanium, zinc, magnesium, and niobium.[0002]Conventional anodizing processes, resultant anodized substrates and coloring techniques have limitations with respect to corrosion and wear resistance and color selection. Some protective compounds applied to the anodiz...
Claims
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IPC IPC(8): C25D9/06
CPCC25D9/06C25D11/04C25D11/08C23C18/1254C25D11/246C23C18/122C23C18/1245C25D11/24
Inventor LEVENDUSKY, THOMASASKIN, ALBERTVEGA, LUIS FANOR
Owner ARCONIC INC