controlled atmosphere
Explanation:
možná i toto zde?
Controlled atmospheres
The high temperature of annealing may result in oxidation of the metal’s surface, resulting in scale. If scale is to be avoided, annealing is carried out in a special atmosphere, such as with endothermic gas (a mixture of carbon monoxide, hydrogen gas, and nitrogen gas). Annealing is also done in forming gas, a mixture of hydrogen and nitrogen.
The magnetic properties of mu-metal (Espey cores) are introduced by annealing the alloy in a hydrogen atmosphere.
|  Ales Horak
Local time: 07:08
Native speaker of:  Czech
PRO pts in category: 16
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The translation workplace 
peer agreement (net): +4
