ACID ZINC SULFATE METAL PRETREATMENT

Disclosed is a phosphate-free aqueous acidic conversion coating comprising zinc sulfate and sulfuric acid. The conversion coating finds special use as a conversion coating to metal substrates prior to application of a cold forming lubricant or prior to application of a paint. The conversion coatings...

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Bibliographische Detailangaben
Hauptverfasser:	Kim, Jennifer, Roelofs, Robert R
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL METALLURGY SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION
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Beschreibung
Zusammenfassung:	Disclosed is a phosphate-free aqueous acidic conversion coating comprising zinc sulfate and sulfuric acid. The conversion coating finds special use as a conversion coating to metal substrates prior to application of a cold forming lubricant or prior to application of a paint. The conversion coatings according to the present disclosure avoid the issues associated with phosphate containing conversion coatings but provide similar benefits to phosphate-based conversion coatings. Optional components of the conversion coating solutions include one or more of pH adjustment neutralizers, coating stabilizers, coating accelerators, coating refiners, etchants, paint adhesion promotors and mixtures thereof. In an additional option, manganese oxide can be used in place of zinc oxide.