OFFICIAL REPORTS ON CORROSION

High‐temperature aluminium alloys. This report is a compilation of corrosion studies performed during the period February 1955 to October 1957 to evaluate aluminium alloys developed for use as cladding material for fuel elements in pressurised water‐cooled reactors at temperatures ranging from 500 to 600°F. The alloy compositions included basic 2S aluminium containing nickel and iron, and special alloys of aluminium and copper. Specimens of each alloy were evaluated in semi‐static and in dynamic streams in isothermal test loops at the American Naval Laboratory. These loops were designed to simulate operating conditions of interest (exclusive of radiation) to the pressurised‐water reactor programme using water conditioning compatible with the most advanced technology for crude and corrosion control for pressurised water systems. Studies of the most promising alloys of aluminium and nickel were extended to include corrosion‐irradiation environments in the test loops at M.T.R. and boiling heat‐transfer conditions in heat throughput loops at A.N.L. The data include supplementary information published in reactor engineering division quarterly reports Nos. 1 and 2, internal memoranda, and reports to the U.S. Navy Task Group on Aluminium Alloys. Subsequent studies are to be described in another report. Referenced ANXL 5546, this 72‐page report has 47 illustrations and is priced $2.