The effect of very high heat fluxes on the corrosion of 1100 and 6061 aluminum alloys by water was investigated. The purpose of the investigation was to determine whether aluminum would have adequate corrosion resistance for use as a fuel-element cladding material in the High-Flux Isotope Reactor; therefore the test conditions generally simulated those expected to exist during reactor operation. At heat fluxes between 1 and 2 x lo6 E3tu/hr*ft2 and with coolant temperatures and velocities in the ranges of 131 to 250°F and jl to 51 fps, respectively, a layer of boehmite (~A~~o~. H~o)

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