DETERMINATION OF THE SURFACE-ACTIVITY OF POWDERS BY ELECTROCHEMICAL METHODS

Two electrochemical methods are suggested in order to control the surf ace reactivity of metallic powder particles with regard to the followi ng electrolytic plating. It is the determination of both the open circ uit potential and anodic dissolution current of a specially constructe d carbon paste electrode containing the investigated powder particles. Iron powder of different granulometric classes activated by grinding, annealing, and chemical reduction was used to prove the suitability o f the chosen methods. It was found that both experimental parameters r eflect the state of the surface.