Method for chromium plating titanium alloy
US6039860A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 9, 1998 |
| Grant date | Mar 21, 2000 |
| Priority date | — |
| Expiry date | Nov 9, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25D5/38
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method for chromium plating a part made of titanium or titanium alloy eliminates the conventional chemical cleaning of the part prior to electroplating, and instead employs a mechanical cleaning of the part including degreasing the part and then grit-blasting the part with aluminum oxide particles. Immediately following the grit-blasting step, for example within one minute of its completion, the part is connected to the negative terminal of a DC power supply and is then immersed into a bath of chromium plating solution which contains an anode element connected to the positive terminal of the power supply. The part is left in the bath for a period of time so as to deposit a plating of chromium on the surface of the part. For final finishing of the part, a post-plating grinding operation is performed in which the surface speed of the grinding wheel is not greater than about 6500 surface feet per minute and the in-feed rate is less than about 0.00015 inch per pass of the grinding wheel, and preferably is about 0.0001 inch per pass.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.