Taiyo Nippon Sanso Corporation (TNSC) has developed an environmentally friendly cover gas for magnesium fabrication, through joint research with Tokai Rika.

The new cover gas, named MG Shield® - whose principal component is fluoroketon - will be used for the first time in Japan in the magnesium die-casting process at the Otowa Plant of Tokai Rika. TNSC will also provide the plant with carbon dioxide for dilution purposes, as well as with the necessary gas supply equipment and piping.

The Japanese industrial gases giant received an award (involving a financial subsidiary in fiscal 2005) from the Ministry of Economy, Trade and Industry for its success in developing a system employing this new magnesium cover gas, thanks to its contribution to the prevention of global warming.

Conventionally, sulfur hexafluoride (SF6), a gas with a GWP (global warming potential) 22,200 times that of carbon dioxide, has been employed as the cover gas for the prevention of magnesium flaring (combustion) in the magnesium die-casting process. Developed specifically to serve as a substitute for SF6, MG Shield® has approximately the same GWP as carbon dioxide, and its use instead of SF6 would thus do much to retard the global warming process.

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