Coating processes – Interior of hollow article coating – Metal base
Patent
1995-05-17
1999-07-06
Bell, Janyce
Coating processes
Interior of hollow article coating
Metal base
148282, 148253, 148254, 138145, 427318, 427399, B05D 722, C23C 806
Patent
active
059195193
ABSTRACT:
A method of treating a potable water supply component, for example a pipe, pipe coupling or tap body, made of a leaded copper-based alloy such as a brass or gun metal, in order to inhibit the leach out of lead from the alloy by potable water during service, comprises treating at least internal surfaces of the component with an aqueous solution of an acid that forms a substantially water insoluble compound with lead. The acid is preferably ortho-phosphoric acid.
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patent: 3420715 (1969-01-01), Ayres
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patent: 4089707 (1978-05-01), Shaffer et al.
patent: 4233088 (1980-11-01), Kronstein
patent: 5076941 (1991-12-01), Boffardi et al.
American Army Standard MIL-M-10578 (1980).
Oliphant, WRC, "Changing Perceptions As To The Significance of Potential., Sources of Lead Contamination in Domestic Water Systems", pp. 1-16 (1992) (no mo.).
Boffardi, Materials Performance, vol. 29, No. 8, Aug. 1, 1990.
Bell Janyce
IMI Yorkshire Fittings Limited
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