Patent ID: 7468122

Claim:
A method of manufacturing a composite layer on a basic metal substrate comprising: dipping a basic metal into an electrolyte comprising: nickel sulfamate [Ni(NH 2 SO 4 )] in a concentration range of 50.0 g/l to 300.0 g/l; boric acid in a concentration range of 10.0 g/l to 20.0 g/l; nickel chloride (NiCl 2 ) in a concentration range of 1.0 g/l to 10.0 g/l; coumarin (C 9 H 6 O 2 ) in a concentration range of 0.02 g/l to 0.5 g/l; sodium dodecyl sulfate [CH 3 —(CH 2 ) 11 —OSONa] in a concentration range of 4.0 g/l to 60.0 g/l; an inorganic silicon carbide (SiC) powder and in a concentration range of 20.0 g/l to 70.0 g/l; sulfuric acid in a concentration range of 15.0 ml/l to 70.0 ml/l; and, distilled water; and electroplating the basic metal substrate to form a nickel-alumina composite layer on the basic metal.