Abstract
A comparative study of oxidation behavior of molten magnesium in HFC-134a/air and HFC-134a/CO2 atmospheres was made. It was found that the oxidation behavior of molten magnesium in HFC-134a/air mixtures was different from that of molten magnesium in HFC-134a/CO2 mixtures, and the difference was increased with decreasing the concentration of HFC-134a. As the concentration of HFC-134a was high, the oxidation rate of molten magnesium in HFC-134a/CO2 atmospheres was slightly slower than that in HFC-134a/air atmospheres. However, when the concentration of HFC-134a was low, the oxidation rate of molten magnesium in HFC-134a/CO2 atmospheres was much slower than that in HFC-134a/air atmospheres. These results indicate that the atmosphere of HFC-134a with CO2 as diluent can provide more effective protection to molten than that with air diluent at the same HFC-134a concentration, especially when HFC-134a concentration is low.
| Original language | English |
|---|---|
| Pages (from-to) | 1913-1918 |
| Number of pages | 6 |
| Journal | Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering |
| Volume | 37 |
| Issue number | 11 |
| State | Published - Nov 2008 |
Keywords
- CO
- HFC-134a
- Magnesium melt
- Oxidation