Process for producing a coating on the surface of a substrate based on lightweight metals by plasma-electrolytic oxidation
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United States of America Patent
Stats
-
Sep 9, 2014
Grant Date -
Oct 18, 2012
app pub date -
Apr 3, 2012
filing date -
Apr 14, 2011
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The present invention relates to a process for producing a coating on the surface of a substrate by plasma-electrolytic oxidation. Improved corrosion protection for lightweight metals, in particular for magnesium or magnesium alloys, is achieved by the process. Furthermore, biocompatible protective layers can also be produced on these materials, with the option of controlling degradation of the substrate. The layers are amorphous. They are produced by plasma-electrolytic oxidation in which the substrate is dipped as electrode together with a counterelectrode into an electrolyte liquid and a sufficient electric potential for generating spark discharges at the surface of the substrate is applied, wherein the electrolyte comprises clay particles dispersed therein. Substrates can therefore be any machine components, automobile components, railroad components, aircraft components, ships' components, etc., or bioimplants such as bone replacement materials or medical bone screws made of a lightweight metal such as magnesium or a magnesium alloy.
First Claim
Other Claims data not available
Family
International Classification(s)
- 2012 Application Filing Year
- C25D Class
- 441 Applications Filed
- 326 Patents Issued To-Date
- 73.93 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 1 Citation Count
- C25D Class
- 15.19 % this patent is cited more than
- 11 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Mar 9, 2026 |
