Method of improving the resistance of Ti-based alloys to corrosion in deep-well environments
US4859415A · kind A · utility
16Cited by
5References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 29, 1987 |
| Grant date | Aug 22, 1989 |
| Priority date | — |
| Expiry date | Oct 29, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C14/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of improving the resistance of oil-well tubular products made of .alpha.-type or (.alpha.+.beta.)-type Ti-based alloys to corrosion in a deep-well environment at high temperatures is disclosed. The method is characterized by adding, as an alloying element, (A) at least one platinum group metal in an amount of 0.02-0.20% by weight, or (B) at least one platinum group metal in an amount of 0.005-0.12% by weight and optionally at least one of Ni, Co, W, and Mo in an amount of 0.05-2.00% by weight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.