A copper alloy having silicon as the main alloying element; zinc, manganese, aluminum, iron, or nickel may be added; high-silicon bronze contains 96% copper and 3% silicon; low-silicon bronze contains 97.7% copper and 1.5% silicon.
In both permanent mold and sand-cast conditions, silicon bronze and silicon brass alloys demonstrated the best corrosion resistance, while leaded-tin bronze showed the least.
Aluminum bronze results in alumina deposits, silicon bronze in silica deposits and trace aluminum in brass results in the complex gahnite (zinc alumina spinel).
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