Alkali Leaching of Ni-Al Alloy Microchannel Lining Layers

Abstract

We investigate alkali leaching of Ni-Al alloy microchannel lining layers to produce a metallic microreactor for high-temperature catalytic reactions. The microchannels and the lining layers were produced by a powder-metallurgical microchanneling process with Ni powder and Al wires. We explored the conditions for the process to produce an Al₃Ni or Al₃Ni₂ lining layer. The Al concentration of the lining layers was successfully decreased by alkali leaching.