Method for providing corrosion resistance to metal objects
AssigneeHenkel Kommanditgesellschaft auf Aktien (Henkel KGaA)
InventorsHelmut Eschwey, Joachim Galinke, deceased, Renate Galinke, nee Jansen, heir, Heinrich Linden, Bernd Wegemund, Norbert Wiemers
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Abstract
Method for providing corrosion protective coatings for metal surfaces. The coatings contain conventional coating components to which are added at least one zinc or lead salt of five- or six-membered heterocyclic compounds substituted by at least one hydroxyl or mercapto group and the ring includes at least one nitrogen atom and at least two conjugated double bonds, of which at least one has the formation. ##STR1## as corrosion inhibitors.
Claims7
The method of providing corrosion resistance to a metal object which comprises the steps of applying to said object a layer of a corrosion-protective composition which contains a corrosion-protecting amount of at least one zinc and/or lead salt selected from the group consisting of zinc, lead and mixed lead/zinc salts of mercaptobenzothiazoles, mercaptopyridines, single or polynuclear-s-triazines containing at least one hydroxyl or mercapto group on the triazine ring, cyanuric acid and thiocyanuric acid, in a film-forming vehicle, and then drying said layer to form a continuous coating thereon.
Dependencies are inferred from the claim text.