EFFECTS OF ALLOYING ADDITIONS AND TEMPERATURE ON THE CORROSION OF ALUMINUM-NICKEL-IRON ALLOYS IN HIGH TEMPERATURE WATER

摘要

The corrosion resistance of a number of aluminum-nickel iron alloys has been studied in static water at 260-350°C. Small additions of Ti, Zr and be were found to improve the corrosion resistance. The effect of increased nickel (demonstrated previously) and these minor additions was found to be additive, and the alloy of best corrosion resistance (AECL 10197) had the weight per cent composition Ni, 2.0; Fe, 0.5; Si, 0.2; Ti, 0.2; Zr, 0.05; Be, 0.05. At 300°C, the static corrosion rate of 10197 was 0.5 x 10-3 inches/ year. The significance of the results is discussed in terms of reactor technology and the mechanism of corrosion.