Chemistry: electrical and wave energy – Processes and products
Patent
1988-08-03
1989-09-12
Kaplan, G. L.
Chemistry: electrical and wave energy
Processes and products
C25D 310
Patent
active
048657000
ABSTRACT:
A composition and method are disclosed for electroplating microporous chromium layers without the requirement that microparticles be present either in the chromium layer or in a sublayer. A composition used contains chromic acid and sulfoacetic acid and, optionally, dichromate ion, sulfate ion and/or fluoride ion but being substantially free of iodide, selenide or bromide ions. A deposit having at least 20,000 micropores per square inch results. The process may be used to make multiple layer articles having an outer layer of microporous chromium.
REFERENCES:
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patent: 3625039 (1971-12-01), Kubach et al.
patent: 3745097 (1973-07-01), Chessin et al.
patent: 3825478 (1974-07-01), Clauss et al.
patent: 4007099 (1977-02-01), Wu
patent: 4472249 (1984-09-01), Chessin
Metz Robert J.
Sovran Joseph G.
Henn R. B.
Kaplan G. L.
M&T Chemicals Inc.
Marcus S. A.
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