The Influence of Radiation on Pit Solution Chemistry as it Pertains to the Transition from Metastable to Stable Pitting in Steels.

Galuszka-Muga, Barbara

University of Florida

关键词: 63 Radiation, Thermal, And Other Environmental Pollutant Effects On Living Organisms And Biological Materials;    Corrosion;    Carbon Steels;    12 Management Of Radioactive Wastes, And Non-Radioactive Wastes From Nuclear Facilities;    Irradiation;   

DOI  :  10.2172/840166
RP-ID  :  DOE/ER/63299
RP-ID  :  FG07-01ER63299
RP-ID  :  840166

美国|英语

来源: UNT Digital Library

【 摘 要 】

An investigation was undertaken of the effect of gamma radiation on metastable pitting of mild carbon steels immersed in a solution similar to those existing at high level waste (HLW) deposits in the US. The object was to observe the extent to which a dosage rate of 1 Mrad/hour (10 Kgrey/hour) affected measurable electrochemical parameters such as pitting potential, open circuit potential, rate of metastable pitting and repassivation potential. Methods for reliably measuring electrochemical potentials in a high radiation field were developed. Exploratory analyses were made of the ion product release and electrolyte composition change in a confined volume simulating the conditions of a corrosion initiated pit during gamma irradiation. As expected the results indicated that the metastable pitting rate (as well as the general rate of corrosion) was significantly enhanced by a radiation field.