Liquidus Curves and Corrosion of Fe, Cr, Ni, Co, V, Cb, Ta, Ti, Zr, in 500–750 C Mercury

Abstract

Abstract Liquldus curves of Fe, Cr, Ni, Co, V, Cb, Ta, Ti and Zr with Hg have been investigated at temperatures from 500 to 750 C (932–1382 F). From the results, relative corrosion rates have been estimated for each of these pure metals at 600 C (1112 F) in Hg which is saturated at 500 C. Predicted corrosion rates increase in the sequence: Ta, Cb, Fe, Co, V, Cr, Zr, Ti, Ni„ A stress-sensitive penetration of grain boundaries of Cb-lZr by Hg was shown to be associated with selective leaching of Zr from the alloy. Annealing the alloy before stressing it reduced but did not eliminate this attack.