Aluminium alloys strips with high surface homogeneity and method for making same
US6834708B1 · kind B1 · utility
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7References
31Claims
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Key dates
| Filing date | Aug 8, 2000 |
| Grant date | Dec 28, 2004 |
| Priority date | — |
| Expiry date | Aug 8, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25D11/04
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An aluminum alloy strip of high surface homogeneity, intended for applications requiring good visual quality or specific optical properties, such as reflectors and anodized plates for construction and decoration. The strip may be characterized by an upper side having, after a 1 &mgr;m thick sulphur anodic treatment, an optical roughness value SN measured on three 5 cm longitudinal sections and three 5 cm transverse sections, such that there is mean variation on each section, defined by the ratio:(Maximum SN−minimum SN)/Mean SN which is less than 20%, and a difference &Dgr;SN=SN max−SN min which is less than 20.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.