Method for converting aluminum and aluminum base,and copper and copper base material surfaces from a hydrophobic to a hydraphilic state
Abstract
Abstract A METHOD OF CONVERTING AN ALUMINUM OR ALUMINUM BASE ARTICLE SURFACE FROM A HYDROPHOBIC TO A HYDROPHILLIC STATE COMPRISING THE STEPS OF MAKING THE SURFACE TO BE CONVERTED THE ANODE IN A BATH COMPRISING AN ACID-FREE AQUEOUS BORAX SOLUTION ATT A TEMPERATURE BETWEEN 100 AND 200* F., AND MAINTAINING AN APPLIED ANODE CURRENT AT A CURRENT DENSITY NOT EXCEEDING 5 AMPERES/SQUARE FOOT FOR A TOTAL CURRENT APPLICATION MAXIMUM OF 300 COULOMBS/SQUARE FOOT. THE HYDROPHILLIC SURFACE PRODUCED IS EXCEPTIONALLY AMENABLE TO SUBSEQUENT COATING BY VARIOUS PAINTS SUCH AS EPOXY BASE, MELAMINE BASE, LATEX, OIL BASE, ETC. COPPER AND COPPER BASE SURFACES ARE SIMILARLY MADE HYDROPHILIC IN THE SAME BATH BUT WITH THE DIFFERENCE IN THAT THE COPPER SURFACE IS MADE THE CATHODE, THE CURRENT DENSITY IS AT LEAST 1 AMPERE/SQUAREE FOOT, AND MINIMUM TOTAL CURRENT APPLICATION OF 30 COULOMBS/SQUARE FOOT IS UTILIZED. THE BATH NEED NOT BE ACID-FREE. THE HYDROPHILIC SURFACE SO MADE IS EXTREMELY EMENABLE TO SUBSEQUENT ELECTROPLATING, RESULTING IN IMPROVED ADHESION.
Inventors
- 👤 L Missel
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |