Method for coating electrode surfaces with an electrically conducting corrosion protection layers used as bipolar plates in fuel cells comprises using metal powder or metal precursors and reactive boron, carbon and/or nitrogen compounds

摘要

Method for coating electrode surfaces with an electrically conducting corrosion protection layers using reactive thermal deposition comprises feeding metal powder or metal precursors and reactive gaseous, liquid or solid boron, carbon and/or nitrogen compounds into the plasma zone of a plasma stream, reacting the metal powder or metal precursors forming metal borides, carbides, nitrides and/or carbonitrides in the plasma and depositing the reaction products and the unconverted metals in nanocrystalline or amorphous form on the substrate. An independent claim is also included for high grade steel electrodes with the nanocrystalline coating.