Coating processes – With pretreatment of the base – Metal base
Patent
1993-03-24
1994-06-21
Beck, Shrive
Coating processes
With pretreatment of the base
Metal base
427337, 427387, 4273884, B05D 312
Patent
active
053227131
ABSTRACT:
Metal sheet protected against corrosion by a silane treated inorganic aluminate coating. A thin aluminate coating was formed by immersing a galvanized steel sheet into an alkaline solution containing 0.005M dissolved aluminate for about 30 seconds. The sheet was dried to form an adherent aluminate coating having a thickness of at least 50 .ANG.. The aluminate coated sheet was immersed into a solution containing 1.0 vol.-% hydrolyzed organofunctional silane for about 5 seconds forming a silane film having a thickness of at least 20 .ANG. on the outer surface of the aluminate coating. Thereafter, the silane treated aluminate coated sheet was painted. The silane film formed a covalent bond between the outer paint layer and the inner aluminate layer. A steel sheet treated with the silane sealed aluminate coating had good corrosion protection, good paint chipping resistance and good paint formability.
REFERENCES:
patent: 5108793 (1992-04-01), van Ooij et al.
Sabata Ashok
van Ooij Wim J.
Armco Inc.
Beck Shrive
Bunyard R. J.
Fillnow L. A.
Johnson R. H.
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