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Refractory alloys Mo-30% W, TZM (Mo-0.5% Ti-0.08% Zr), W-25% Re, and Ta-10% W, and their respective pure metals were exposed to molten zinc and CaCl2-KCl salt mixture at about 800°C under argon cover gas for 110 to 120 h. Materials as-received from suppliers include recrystallized and as-rolled structures. Chemical analysis of alloying constituents revealed that the Mo-30% W contained 28.0% W, that W-25% Re contained 25.26% Re, and that Ta-10% W contained 9.73% w. All pure metals were commercial grades with purities greater than 99.95%. Results for carbon, oxygen, and hydrogen analyses of the material are not available at this time.