The invention relates to the field of
metal surface modification and provides a preparation technology of an
antioxidant and conductive
spinel coating. The method comprises the follow steps:
smelting after Co
metal powder and Mn
metal powder are uniformly mixed, then carrying out annealing to well smelt CoMn
alloy, and cleaning up the well smelt CoMn
alloy treated through annealing as deposit
electrode material for reservation; taking a prepared deposit
electrode as a
cathode in the process of
sedimentation, taking metal as the material of a
basal body, under the protection of
inert gas, and carrying out electro- spark deposition on the surface of the metal, that is a CoMn
alloy coating layer is produced; and carrying out heating and pre-oxidation on the prepared CoMn
alloy coating layer in
air atmosphere, that is a CoMn
spinel coating is formed on the surface of the CoMn
alloy coating layer. According to the invention, alloy
atomic ratio can be accurately controlled, the conducting material of the
electrode is oozed into the surface of a metal piece to form the alloy layer, the prepared coating and the
basal body have the characteristic of metallurgical bonding, the bonding force is strong, and the coating forms a
spinel which meets the protecting requirements of an SOFC (
Solid Oxide Fuel
Cell) metallic union body.