A process for the reduction of the lead leaching out in drinking water supply systems

摘要

A process for the surface treatment of installation components from lead-containing copper alloys for the reduction of the lead, which can be leached out by the action of a fluid medium, in particular of water in a drinking water supply system, characterized in that the surface of the lead in a first step to a solid lead or lead carbonate hydroxide is reacted with additional supply of oxygen and in that the resulting lead hydroxide or lead carbonate in a second step under the influence of at least one of the acids tetrafluoroboric acid, fluorine silicic acid, nitric - and / or hydrochloric acid and is transported away.