Method for the production of dark protective layers on flat...

Details Method for the production of dark protective layers on flat... Method for the production of dark protective layers on flat...

2005-07-12

2005-07-12

Zimmerman, John J. (Department: 1775)

Stock material or miscellaneous articles

Composite

Of metal

C428S702000, C148S243000

Reexamination Certificate

active

06916546

ABSTRACT:
The invention relates to the production of protective coatings with a dark color by pickling rolled flat objects, made from titanium zinc, for use in construction. The flat objects are pickled in an aqueous pickling bath containing a mixed acid of sulphuric acid and nitric acid and passivated after rinsing by application of a protective layer. Rolled flat objects such as those made from a titanium zinc alloy are used. The alloy comprises mainly zinc of high purity with additionally a copper content of 1.0 to 2.0 wt. %, a titanium content of 0.06 to 0.2 wt. % and a maximum aluminum contant of 0.015 wt. %.

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“Quality Zinc”, Tuev Produkt und Umwelt GmbH, Institut fuer Umweltschutz und Energietechnik, Am grauen Stein, 51105 Koeln.

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