METHOD OF PRODUCING TIN-FREE LEAD COATINGS ON STEEL

A method of providing a substantially tin-free lead coating on a steel substrate comprising treating the surface of the substrate with an SnCl2-containing flux and then immediately immersing the substrate in molten lead. According to the preferred embodiments, the flux is floated on top of the lead...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	POOL, KARL, H, TELANDER, MONTY, R, PITMAN, STAN, G, WESTERMAN, RICHARD, E
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:	A method of providing a substantially tin-free lead coating on a steel substrate comprising treating the surface of the substrate with an SnCl2-containing flux and then immediately immersing the substrate in molten lead. According to the preferred embodiments, the flux is floated on top of the lead such that the substrate can be passed from the flux to the lead without exposing it to oxidizing air. Méthode permettant d'obtenir un revêtement de plomb pratiquement exempt d'étain sur un substrat en acier. Ladite méthode consiste notamment à traiter la surface du substrat avec un flux contenant du SnCl2 et d'immerger immédiatement après le substrat dans du plomb fondu. Dans des modes préférés de réalisation, on fait flotter le flux au-dessus du plomb de sorte qu'on peut faire passer le substrat du flux dans le plomb sans l'exposer à l'oxydation de l'air.