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topic 26483

Etching nickel


I want to etch a porous pure nickel material. The desire is to increase the entire surface area (internal and external) before a platinum catalyst is deposited into the pore system. Any recipes or instructions would be greatly appreciated. 


Brian Winslett
Research - Asheville, North Carolina


Electroless nickel plate it (8% phosphorous) then immerse for 20 seconds in 1:1 nitric acid at 50 °C. I don't know if this is covered by any patents, but it was presented by Christian Johnson of the National Bureau of Standards (now NIST) as "Unique Surface Morphology with Extremely High Light Absorption Capacity" at one of the "Electroless Nickel conferences" sponsored by "Products Finishing" (I think the 1st one, in 1980).

Ted Mooney, Teds signature
Ted Mooney, P.E.
Pine Beach, New Jersey
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