A COMPARISON OF CORROSION PROPERTIES BETWEEN LEADED BRASS AND UNLEADED BRASSES CONTAINING BISMUTH IN POTABLE WATER SYSTEMS

摘要

Effect of Bi on dezincification of unleaded brass was evaluated in synthetic tap water. Potentiodynamic, potentiostatic tests, SEM, XRD and EPMA analyses were used to investigate the corrosion characteristics of Bi-containing brasses. As the content of Bi increased, the corrosion resistance of unleaded brass increased. The leaded brass had only a slight tendency to dezincification, whereas the Bi-containing unleaded brasses were more susceptible.