Fabricated titanium article having improved corrosion resistance
A titanium article having improved corrosion resistance resulting from a direct or indirect attachment of a platinum group metal or alloy thereof or incorporation of this metal or alloy thereof into a minor surface portion of the article.
1. A titanium article having improved corrosion resistance, comprising a titanium substrate having a direct or indirect attachment to a minor surface portion thereof, said attachment comprising a platinum group metal or platinum group metal alloy, or having an integral incorporation of a platinum group metal or platinum group metal alloy, wherein the platinum group metal is present in an area less than 1% (excluding 0) of the surface area to be protected or any minor surface area for the platinum group metal alloy, whereby said article exhibits better corrosion resistance than said article without said attachment or integral incorporation.
2. The titanium article of claim 1 , wherein said attachment or integral incorporation is present in an article surface area to an attachment or integral incorporation ratio of 10 to 10000.
3. The titanium article of claim 1 , wherein said attachment or integral incorporation is present in an article surface area to attachment or integral incorporation ratio of 50 to 10000.
4. The titanium article of claim 1 , or claim 2 , or claim 3 , wherein said platinum group metal is platinum.
5. The titanium article of claim 1 , or claim 2 , or claim 3 , wherein said platinum group metal alloy includes Ti-0.3-15% Pd or Ti-0.3-15% Pt.
6. The titanium article of claim 1 , or claim 2 , or claim 3 , wherein said platinum group metal alloy includes 1% Pd or 1% Pt.
7. A titanium article having improved corrosion resistance, comprising a titanium substrate having a direct or indirect attachment to or having an integral incorporation of a minor surface portion thereof by welding of a platinum group metal or platinum group metal alloy, wherein said attachment or integral incorporation is present in an area less than 1% (excluding 0) of the surface area to be protected or any minor surface area for the platinum group metal alloy, whereby said article exhibits better corrosion resistance than said article without said attachment or integral incorporation.
8. The titanium article of claim 7 , wherein said attachment or integral incorporation is present in an article surface area to attachment or integral incorporation ratio of greater than 10 to 10000.
9. The titanium article of claim 7 , wherein said attachment or integral incorporation is present in an article surface area to attachment or integral incorporation ratio of greater than 50 to 10000.
10. The titanium article of claim 7 , or claim 8 , or claim 9 , wherein said platinum group metal is platinum.
11. The titanium article of claim 7 , or claim 8 , or claim 9 , wherein said platinum group metal alloy composition range includes Ti-0.3-15% Pd or Ti-0.3-15% Pt.
12. The titanium article of claim 7 , or claim 8 , or claim 9 , wherein said platinum group metal alloy includes 1% Pd or 1% Pt.
13. A titanium article having improved corrosion resistance, comprising a titanium substrate having a direct or indirect attachment to a minor surface portion thereof, said attachment comprising a plating of a platinum group metal or platinum group metal alloy wherein said attachment is present in an area less than 1% (excluding 0) of the surface area to be protected or any minor surface area for the platinum group metal alloy, whereby said article exhibits better corrosion resistance than said article without said attachment.
14. The titanium article of claim 13 , wherein said attachment is present in an article surface area to attachment ratio of greater than 10 to 10000.
15. The titanium article of claim 14 , wherein said attachment is present in an article surface area to attachment ratio of greater than 50 to 10000.
16. The titanium article of claim 13 , or claim 14 or claim 15 , wherein said platinum group metal is platinum.
17. The titanium article of claim 13 , or claim 14 , or claim 15 , wherein said platinum group metal alloy includes Ti-0.3-15% Pd or Ti-0.3-15% Pt.
18. The titanium article of claim 13 , or claim 14 , or claim 15 , wherein said platinum group metal alloy includes 1% Pd or 1% Pt.
19. A titanium article having improved corrosion resistance, comprising a titanium substrate having a direct or indirect attachment to a minor surface portion thereof, said attachment comprising a vapor deposited platinum group metal or platinum group metal alloy, wherein said attachment is present in an area less than 1% (excluding 0) of the surface area to be protected or any minor surface area for the platinum group metal alloy, whereby said article exhibits better corrosion resistance than said article without said attachment.
20. The titanium article of claim 19 , wherein said attachment is present in an article surface area to attachment ratio of greater than 10 to 10000.
21. The titanium article of claim 19 , wherein said attachment is present in an article surface area to attachment ratio of greater than 50 to 10000.
22. The titanium article of claim 19 , or claim 20 , or claim 21 , wherein said platinum group metal is platinum.
23. The titanium article of claim 19 , or claim 20 , or claim 21 , wherein said platinum group metal alloy includes Ti-0.3-15% Pd or Ti-0.3-15% Pt.
24. The titanium article of claim 19 , or claim 20 , or claim 21 , wherein said platinum group metal alloy includes 1% Pd or 1% Pt.
25. A titanium article having improved corrosion resistance, comprising a titanium substrate having directly or indirectly attached to or having an integral incorporation of a minor surface portion thereof by means of a mechanical fixture comprising a platinum group metal or platinum group metal alloy, wherein the platinum group metal is present in an area less than 1% (excluding 0) of the surface area to be protected or any minor surface area for the platinum group metal alloy, whereby said article exhibits better corrosion resistance than said article without said mechanical fixture.
26. The titanium article of claim 25 , wherein said mechanical fixture is present in an article surface area to mechanical fixture ratio of greater than 10 to 10000.
27. The titanium article of claim 26 , wherein said mechanical fixture is present in an article surface area to mechanical fixture ratio of greater than 50 to 10000.
28. The titanium article of claim 25 , or claim 26 , or claim 27 , wherein said platinum group metal is platinum.
29. The titanium article of claim 25 , or claim 26 , or claim 27 , wherein said platinum group metal alloy composition range includes Ti-0.3-15% Pd or Ti-0.3-15% Pt.
30. The titanium article of claim 25 , or claim 26 , or claim 27 , wherein said platinum group metal alloy includes 1% Pd or 1% Pt.
31. The titanium article of claim 25 , or claim 26 , or claim 27 , wherein said mechanical fixture comprises a prefabricated component containing the platinum group metal or platinum group metal alloy.