Approximately 13 million tons of zinc is produced annually worldwide. Sixty percent of this is used for galvanizing to protect steel from corrosion thus significantly prolonging the service life of steel products. Approximately fifteen percent goes into the production of zinc alloys, mainly to supply the die casting industry, fourteen percent goes into the production of brass and bronze and eight percent into the production of compounds including zinc oxide and zinc sulfate. The remainder is zinc alloys, mainly rolled, utilized in semi-manufactured applications including coinage and architectural applications.