2010年8月13日星期五

Should I be concerned with Cobalt in my Ring?


Absolutely YES!

Many tungsten and tungsten carbide rings have Cobalt in them. The alloy containing Cobalt is easier to procure and rings containing Cobalt are commonly sold. However, rings containing Cobalt will develop a negative reaction to your skin. After a short period, the ring will develop oxidation spots that cannot be removed or polished out. This is due to the Cobalt reacting to the human body in which many people's skin can be irritated causing itching. You can easily prevent this from happening by purchasing one of our Cobalt-free, hypoallergenic, Tungsten Forever Carbide rings. As following, we will talk about the concept and compound of cobalt.

Cobalt (pronounced
/ˈkəʊbɒlt/ KOH-balt)[3] is a hard, lustrous, gray metal, a chemical element with symbol Co and atomic number 27. Cobalt-based colors and pigments have been used since ancient times for jewelry and paints, and miners have long used the name kobold ore for some minerals.
Cobalt occurs in various metallic-lustered
ores, for example cobaltite (CoAsS), but is mainly produced as a by-product of copper and nickel mining. The copper belt in the Democratic Republic of the Congo and Zambia yields most of the cobalt mined worldwide.

Cobalt is used in the preparation of
magnetic, wear-resistant, and high-strength alloys. Smalte (cobalt silicate glass) and cobalt blue (cobalt(II) aluminate, CoAl2O4) gives a distinctive deep blue color to glass, ceramics, inks, paints, and varnishes. Cobalt-60 is a commercially important radioisotope, used as a tracer and in the production of gamma rays for industrial use.
Cobalt is an essential trace element for all animal organisms as the active center of coenzymes called
cobalamins. These include vitamin B12 which is essential for mammals. Cobalt is also an active nutrient for bacteria, algae, and fungi.
Common oxidation states of cobalt include +2 and +3, although compounds with oxidation state +1 are also known. The most common oxidation state for simple compounds is +2; cobalt compounds in the +3 state are oxidizing agents. Cobalt(II) salts form the red-pink [Co(H2O)6]2+ complex in aqueous solution. Adding excess chloride will change the color from pink to blue, due to the formation of [CoCl4]2−.[2] the compound is harmful for our health.
According to my description, so you should be careful to choose the tungsten rings whether the rings has the cobalt in the future. It is helpful for your health and your life!

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