Corrosion of diamond-like-carbon-coated nickel in 0.25 m sodium chloride

Diamond-like carbon (DLC) was deposited on to high-purity nickel using an acetylene plasma. The corrosion resistance of coated and uncoated nickel was electrochemically measured in 0.25M NaCl at 22-degrees-C. This work presents the first report of the deposition of DLC on to nickel and the first potentiodynamic electrochemical testing of DLC. The DLC-coated nickel had a corrosion rate more than two orders of magnitude less and a corrosion potential 0.22 V greater than those of the uncoated nickel.