| Brasses are the most widely used copper-based alloys because of the good corrosion resistance and formability. The leaching of lead to potable water could produce serious medical problems. Due to the leads toxicity, nontoxic bismuth is the most alternative to lead for the machinability of brass. Effect of Bi on dezincification of unleaded brass was evaluated in synthetic tap water. Potentiodynamic, potentiostatic tests, open-circuit potential measurements, SEM, and EPMA analyses were used to investigate the corrosion characteristics of Bi-containing brasses. The leaded brass had only a slight tendency to dezincification, whereas the Bi-containing unleaded brasses were more susceptible. As the content of Bi increased, the corrosion resistance of unleaded brasses increased due to the decreased amount of βphase. |
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