chromium
铬,铬含量,铬合金,铬元素
Definitions
- 1
- : a lustrous, hard, brittle, metallic element used in alloy steels for hardness and corrosion resistance, as in stainless steel, and for plating other metals: chromium salts are used as pigments and mordants. Symbol: Cr; atomic weight: 51.996; atomic number: 24; specific gravity: 7.1.
- : chrome.
Examples
In rubies, the chromium atoms are positioned close oxygen atoms.
For instance, a ruby gets its brilliant red color by swapping a little bit of chromium for aluminum in its formula.
Starting in 2016, the Altamaha Riverkeeper began testing private wells for contaminants commonly found in coal ash, including hexavalent chromium, a trace metal associated with an increased risk of cancer.
The wells closer to Scherer’s ash ponds — including along Luther Smith Road — generally had levels of hexavalent chromium higher than those farther away.
Dupree recently tested his drinking well, finding levels of hexavalent chromium above the health standards set by California and North Carolina.
Unlike metals like iron, which rusts and corrodes dramatically, chromium remains stable after oxidation and subsequent burial.
The coal ash deposits have heavy concentrations of hexavalent chromium, a carcinogen.
RockMelt is built on open-source code—the Chromium software created by Google and used for its own Chrome browser.
A similar result is obtained when the solution of a chromium salt is treated with a solution of ammonium sulphide.
Any chromium present will now be in solution in the easily recognised form of potassic chromate (see “Chromium”).
Just at that moment a big blue sports roadster pushed a bright chromium nose around the corner of the house.
A small beaded screen had been pulled down from the ceiling, facing two chromium-and-leather lounge chairs.
Hydrated chromium sesquioxide is another mineral emerald green.