The oxide is removed from iron by means of ... and the coppered plates come out smooth, and well coated. Brass, or any of the copper alloys, can be made to coat the iron, in the same manner ...

A copper and brass factory is contaminating the Kelani River in Pethiyagoda, harming the environment and the health of ...

Allegations have surfaced that a copper and brass extracting company is discharging heavy metals into the Kelani River, the ...