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ABSTRACT'lllis paper investigates t11e combustion of magnesium and boron powders in hot steam. A thermochemical analysis reveals theoretical results of such interactions. An experimental investigation demonstrates that stable exotllennic oxidation takes place, resulting in actual combustion at 1100 °c for magnesium atld 800 °c for boron. 'llle reaction generates large qUatltity of gaseous products consisting of ahnost pure hydrogen atld correspondiIlg to about 60 per cent of a complete chemical reaction.metals indicates the possibility of stable combustion in a steam atmosphere and the use of this heat for metal and steam preheating. It can be seen that from this point of view magnesium and especially boron are the metals of particular interest (Table 1 ).

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