COPPER AND ZINC ELUTION PREVENTING METHOD OF COPPER-ALLOY-MADE PLUMBING INSTRUMENT INCLUDING VALVE AND PIPE JOINT, COPPER-ALLOY-MADE PLUMBING INSTRUMENT USING THE METHOD, AND FILM-FORMING AGENT
申请人:SUGAYA Norikazu
公开号:US20120125458A1
公开(公告)日:2012-05-24
A method is provided for preventing copper and zinc from being eluted from a copper-alloy-made plumbing instrument that includes valves and pipe joints and suppresses copper and zinc from being eluted from the copper-alloy-made plumbing instrument while using for the plumbing instrument copper alloy as-is that includes bronze and brass, to provide a copper-alloy-made plumbing instrument using the method and to provide a film-forming agent. The method forms on at least a liquid-contact portion of the copper-alloy-made plumbing instrument a film of an organic substance comprising unsaturated fatty acid and coating with the film both copper and zinc in the surface layer of the liquid-contact portion of the plumbing instrument, thereby suppressing the elution of copper and zinc.
806. Syntheses of long-chain acids. Part VII. Preparation and reduction of some alkadiynoic acids