Process for pretreating steel plates for enamelling
Abstract
Abstract A PROCESS OF PENETRATING STEEL PLATES FOR ENAMELLING BY DEGREASING, PICKLING, METALLISING, NEUTRALISING AND DRYING, WHEREIN METALLISING IS CARRIED OUT GALVANICALLY IN AN ACID BASE WHICH CONTAINS BESIDES NICKEL AND/OR COBALT IONS MAGNESIUM AND CHLORINE IONS, THE NICKEL AND COLBALT IS APPLIED TO THE SURFACE TO BE ENAMELLED IN QUANTITIES OF FROM 0.3 UP TO 0.7 G./M.2, CALCULATED AS METAL. OPTIONALLY, BEFORE THE METALLISING STEP AN ELECTROLYTICALLY DEGREASING AND PICKLING STEP IS PERFORMED. BY THE AFORESAID TREATMENT THE OVERALL TIME CONSUMPTION OF PRETREATMENT CONSIDERABLY SHORTENED. THE PRETREATING IS SUITABLE FOR STEEL SURFACES TO BE ENAMELLED AND IS PARTICULAR ADVANTAGE WITH DIRECT ENAMELLING PROCESSESS.
Inventors
- 👤 H Hoffmann
- 👤 G Trogel
- 👤 W Immel
- 👤 E Knaak
Bibliographic Details
Claims Analysis
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 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 |