alexa Electrochemical Corrosion Of Zircaloy-2 Under PWR Water Chemistry, But At Room Temperature
ISSN: 2155-9619

Journal of Nuclear Medicine & Radiation Therapy
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International Conference on Nuclear Chemistry
December 08-09, 2016 San Antonio, USA

Hani Mohamed Hamed Tawfik Mohamed
Nuclear Materials Authority, Egypt
Posters & Accepted Abstracts: J Nucl Med Radiat Ther
DOI: 10.4172/2155-9619.C1.009
Abstract
Electrochemical corrosion of Zircaloy-2 was tested at room temperature in lithium hydroxide (LiOH) concentrations that ranged from 2.2 to 7000ppm and boric acid (H3BO3) concentrations that ranged from 50 to 4000ppm. Following the corrosion experiments, the oxide films of specimens were examined by SEM to examine the oxide existence. LiOH concentrations as high as 1 M (7000-ppm lithium) can lead to significantly increased electrochemical corrosion rate. It is suggested that the accelerated corrosion in concentrated solution is caused by the synergetic effect of LiOH, pH and porosity generation. In solutions containing 100ppm of lithium, the presence of boron had an ameliorating effect on the corrosion rates of Zircaloy-2. Similar to acceleration of corrosion by lithium, the inhibition by boron is due to a combined effect of pH neutralizing and its participation in the corrosion process.
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