Steelcord-Method

The steel wire first passes the lubricant removal, where all the impurities such as grease and others are put away from the wire.

Afterwards the wire is lead through the patenting furnace to anneal the wire and afterwards the wire is cooled by e.g. a quenching bath. Then the pickling section attacks the surface of the wire by using the base acid of the copper bath to get the wire more activating in the plating bath. After the rinsing of the pickling the wire gets copper-plated in a copper pyrophosphate bath.
Then secondly after an additional rinsing the wire is plated with zinc and also rinsed.

The finally thermal diffusion (fluidized bath) mixes the two layers together in order to create a brass layer. After the final rinsing that the wire passes, the process is completed.