Apparatus and method for inhibiting the leaching of lead in...

Details Apparatus and method for inhibiting the leaching of lead in... Apparatus and method for inhibiting the leaching of lead in...

C - Chemistry, Metallurgy

22

C

C22C 9/08 (2006.01) B05D 7/22 (2006.01) C23C 18/31 (2006.01) F16L 58/08 (2006.01)

Patent

CA 2190464

A copper alloy plumbing fixture (2) containing interdispersed lead particles (10, 12) coated noncontinuously on a water contact surface (4) to resist the leaching of lead into the potable water system. The leach resistant fixture is prepared by immersing conventional copper alloys in a bismuth nitrate solution, selectively and noncontinuously coating the lead dispersoid particles on the water contract surface (4) with bismuth. Tin may be substituted for bismuth to obtain similar results.

L'invention concerne une pièce de plomberie à alliage de cuivre contenant des particules de plomb interdispersées revêtant de manière discontinue une surface en contact avec l'eau afin de résister à la lixiviation du plomb dans des systèmes d'eau potable. La pièce résistant à la lixiviation est préparée par immersion d'alliages de cuivre classiques dans une solution de nitrate de bismuth, et application de manière sélective et discontinue de bismuth sur les particules dispersées de plomb se trouvant sur la surface au contact de l'eau. On peut remplacer l'étain par du bismuth afin d'obtenir des résultats similaires.

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