Surface treatment of magnesium and its alloys
AssigneeMagnesum Technolgy Limited
InventorsIan Mawston, Serguei Panov
Life of this patent
Estimating the term…
Abstract
Methods of polishing and/or brightening surfaces of magnesium or magnesium alloy are disclosed. Polishing and/or brightening methods suitable to both high and low aluminium content magnesium articles are disclosed. In each of the methods, the surface is polished and then passivated. Using the disclosed methods it is possible to control aspects of the appearance of the surface to thereby, for example, obtain a bright and shiny surface to a magnesium or magnesium alloy article which is both stable and corrosion resistant. It is also possible to provide a predetermined texture to the surface using optional steps.
Claims30
A method of polishing and/or brightening a magnesium or magnesium alloy surface composing the steps of:
- i) polishing the surface, and
- ii) passlvating the polished surface,
- wherein the polishing step is carried out by a chemical polish and/or electro-chemical polish while said surface is immersed in a polishing composition of one or more of the following components;
- a phosphoric acid solution, monopmpylene glycol, ethylene glycol, dnd nitric acid.
A method of polishing and/or brightening a magnesium or magnesium alloy surface as hereinbefore described and with reference to any one of the accompanying drawings.
A magnesium or magnesium alloy surface polished or brightened according to the method substantially as hereinbefore described and with ret to any one of the accompanying drawings.
Dependencies are inferred from the claim text.