SEALING OF ELECTROLYTICALLY FORMED POROUS FILMS OF ALUMINUM BY NICKEL FLUORIDE PROCESS

Since the early 1980s, nickel fluoride cold sealing of anodized aluminum, on the basis of energy saving processes, has been marketed in industry. Currently, it is possible to substitute cold sealing as an alternative to conventional hydrothermal sealing, almost without any drawbacks, while enabling reduced treatment time, reduced cost of operation and, most important, energy conservation. The most important criteria associated with cold sealing are covered, with attempts to present the findings as an independent view of the process.