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| >> GLOSSARY OF TERMS |
| Z |
| ZINC (Chemical Symbol Zn) - Element No. 30 of the periodic system; atomic weight 65.38. Blue-white metal; when pure, malleable and ductile even at ordinary temperatures; melting point 7870?F., boiling point 16650?F., specific gravity 7.14. Can be electrodeposited; it is extensively used as a coating for steel (See Galvanizing) and sheet zinc finds many outlets, such as dry batteries, etc. Zinc-base alloys are of great importance in die casting. Its most important alloy is brass. |
| ZIRCONIUM (Chemical Symbol Zr.) - Element No. 40 of the periodic system. Atomic weight 91.22. Specific gravity 6.5 and melting point at about 3200? +/- 1300?F. Because of its great affinity for oxygen and combines readily with nitrogen and sulfur it is used as a deoxidizer and scavenger in steel making. It is used as an alloy with nickel for cutting tools and is used in copper alloys. |
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