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US 5,837,117 AGranted
Two-stage process for electrolytically polishing metal surfaces to obtain improved optical properties and resulting products
AssigneeSatma
InventorFrancis Allegret
Life of this patent
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Abstract
A process for polishing a metal surface, typically based on Al, Mg, Ta, Ti, Zr, Hf or their alloys, comprises a first conventional polishing step by chemical or electrolytic means and a second electrolytic micro-polishing step by anodizing in a mineral, organic or mixed acid solution to form a oxide layer of the barrier type having a thickness between 100 and 500 nm.
Claims17
Process for polishing a metal surface comprising:
- a first polishing step by chemical or electrolytic means to obtain a surface roughness less than about 10 nm, followed by
- a second electrolytic micro-polishing step by anodizing in a solution of mineral acid, organic acid or mixture thereof to form an oxide layer of barrier oxide layer having a thickness between about 100 and 500 nm.
Dependencies are inferred from the claim text.