Surface modification of cold drawn steel wire rod has been performed using a set of microwave plasma torches operating at 2.45 GHz, 3 kW maximum power, with the aim to modify the wire surface morphology and chemical composition prior to hot dip coating with Znbased alloys. The effect of varying the carrier gas type and flux is investigated experimentally and by numerical simulation. Adhesion of the zinc-based coating after plasma treatment, compared to untreated samples, as well as corrosion resistance, resulted improved, however treatment reproducibility can be still considered poor.
Continuous microwave plasma processing of cold drawn steel wire rod / Veronesi, Paolo; Rosa, Roberto; Leonelli, Cristina; Cavatorta, Giovanni. - (2011), pp. 411-414. (Intervento presentato al convegno 13th International Conference on Microwave and Radio Frequency Heating, AMPERE 2011 tenutosi a Toulouse, fra nel 2011).