Chrome Steel

—Steel containing 1.2 to 1.5 % of chromium, which confers upon it extraordinary hardne and tenacity, rendering it suitable for projectiles, armor plates, safes, ete. Chromic Acid Cell. A primary cell employing as a depolarizer, chromium trioxide di olved in water forming a mixture popularly known as chromic acid. This cell was formerly known as the pota ium bichromate cell from the fact that originally the chromium trioxide was obtained from pota ium bichromate. The plates employed are carbon and amalgamated zinc. f Chromium. A white metal, very infusible, with a specific gravity 6.8, principally occurring in nature as chrome iron ore, which is found in the Shetland Islands, Bosnia and California. Alloyed with steel in small quantities, it produces a material of extreme hardne and tenacity, and its compounds and derivatives are numerous and useful. Chrome alum is employed in drang and calico printing; bichromate of potash is used for electrical purposes.