A METHOD OF REDUCING THE QUANTITY OF LEAD RELEASED BY BRONZE AND/OR BRASS WATER-SYSTEM COMPONENTS INTO LIQUIDS THAT ARE INTENDED FOR HUMAN CONSUMPTION

A method of reducing the quantity of lead released by water-system components made of metal alloys containing lead when they are in contact with liquids intended for making beverages for human use comprises at least the following steps in sequence: - preliminary reduction of the quantity of lead con...

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Bibliographische Detailangaben
Hauptverfasser:	STEFANO CARRERA, CLAUDIO VOLONTE
Format:	Patent
Sprache:	eng ; por
Schlagworte:	APPARATUS THEREFOR 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 ELECTROFORMING ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FIXED CONSTRUCTIONS INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, ORDISTRIBUTING WATER METALLURGY MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLICMATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASSC23 AND AT LEAST ONEPROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25 NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS SEWERAGE SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION WATER SUPPLY
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Beschreibung
Zusammenfassung:	A method of reducing the quantity of lead released by water-system components made of metal alloys containing lead when they are in contact with liquids intended for making beverages for human use comprises at least the following steps in sequence: - preliminary reduction of the quantity of lead contained in the material constituting the components, - coating of the components thus treated, at least on the surface which is to come into contact with the liquids, by the chemical deposition of a tin layer, - coating of the water-system components, at least on their surface that was treated by the deposition of the tin layer, by the electrolytic deposition of a covering metal alloy.