Plasma chemical reduction of model corrosion brass layers prepared in soil Lucie Radkova, Petra Mikova, Radek Prikryl and Frantisek Krcma Eur. Phys. J. Appl. Phys., 75 2 (2016) 24717 Published online: 08 August 2016 DOI: 10.1051/epjap/2016150588