Uses of Chromium and Erbium

Chromium

Erbium

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Uses

It is used to harden the steel and produces a stainless steel and other various alloys.
It is also used to give proper finish to polished mirrors. Its chromium plates are used in bathroom fittings.

Automobile Industry, Chemical Industry

Alloys

Highly Toxic

✔✘

0.11 Blood/mg dm-3

0.33 p.p.m.

It has a tendency to get tarnished in the open air, but when alloyed with elements like erbium, vanadium, its hardness levels decreases.
Its compounds like Erbium oxide is used in safety glasses of welders and metal workers.

Chemical Industry

Alloys

Mildly Toxic

✔✘

0.00 Blood/mg dm-3

0.00 p.p.m.