Anodic behaviour of brass – a ring‐disc study

Abstract

Using electrodes of the ring-disc type the authors have investigated the dissolution of brass in sodium sulfate, sodium chloride, ammonium chloride and hydrochloric and sulfuric acids as well as mixtures of these chemicals. Using potential current curves the influence has been assessed o f concentration, pH, speed of rotation, aeration and additional anions and cations. The results obtained show the ranges of preferential dissolution of zinc, the simultaneous dissolution of copper and zinc and corresponding Tafel slopes.

Lower concentration ultrafine particulates improve the surface properties of metals and alloys

“…Such anodic sites may be grain‐boundaries, micro‐voids, inclusions and other stress concentration‐points, including dislocation, etc. [1, 2, 3, 4, 5, 6].…”

“…The galvanic incompactivity of these combinations can be considerably reduced by making the brass component more active and the zinc‐alloy more inert, at par with the adjoining steel structures. Dealloying of brass[3], also known as dezincifiction, is an age‐old problem. Such preferential dissolution of either zinc and copper and sometimes preferential dissolution of both copper and zinc, have been encountered in various industrial applications.…”