アルミニウムの水腐食にたいする放射線効果

抄録

The corrosion of “four-9” aluminium in pure water was investigated as a function of the intensity of γ-irradiation at ordinary temperature. A low exposure less than 10²R/hr produced no effect in practise, but the higher exposure remarkably retarded the corrosion. The minimum corrosion rate was observed at about 10⁴R/hr. An intensive exposure over this value stimulated the localized attack of the metal and the dispersion of the corrosion product. The formation of hydrogen peroxide was found to be insufficient in amount to cause the inhibition of corrosion at any rate of exposure, although the co-operative action of the oxidative free radicals and the hydrogen peroxide was postulated. The stimulation of corrosion at the highest exposure was attributed to the radiation chemical destruction of the protective film on aluminium.