Electroless process for treating metallic surfaces and products formed thereby
AssigneeElisha Holding LLC
InventorsRobert L. Heimann, Brank Popov, Bruce Flint, Dragan Slavkov, Craig Bishop
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Abstract
The disclosure relates to a process for forming a deposit on the surface of a metallic or conductive surface. The process employs an electroless process to deposit a silicate containing coating or film upon a metallic or conductive surface.
Claims19
An electroless method for treating a substrate having an electrically conductive surface comprising:
- contacting at least a portion of the surface with a medium comprising at least one silicate and having a basic pH and wherein said medium is substantially free of chromates,
- drying the substrate,
- rinsing the substrate,
- drying the substrate.
An aqueous medium for use in an electroless process for treating a conductive surface comprising a combination comprising water, at least one water soluble silicate, colloidal silica, at least one dopant and wherein the medium has a basic pH and is substantially free of chromates and VOCs.
An electroless method for treating a metallic or an electrically conductive surface comprising:
- exposing at least a portion of the surface to a medium comprising a combination comprising water, colloidal silica, and at least one water soluble silicate wherein said medium has a basic pH,
- drying the surface,
- rinsing the surface,
- drying the surface;
- and
- contacting the treated surface with at least one composition that adheres to the treated surface.
An article comprising an electrically conductive substrate comprising zinc wherein at least a portion of which has an inorganic and chromate free surface and at least one composition adhered to said article and wherein said has an ASTM B117 exposure to white rust of greater than 72 hours.
Dependencies are inferred from the claim text.