 Cadmium electroplating , consuming 6 % of the global production , is used in the aircraft industry reduce corrosion of steel components . This coating is <unk> by <unk> salts . A limitation of cadmium plating is hydrogen embrittlement of high @-@ strength <unk> from the electroplating process . Therefore , steel parts heat @-@ treated to tensile strength above 1300 MPa ( 200 <unk> ) should be coated by an alternative method ( such as special low @-@ embrittlement cadmium electroplating processes or physical vapor deposition ) . 
