Study of the effect of temperature and concentration on the corrosion behavior of B4C/6061Al neutron absorbing composite in H3BO3 solutions
作者
单位
1 National Center for Materials Service Safety、University of Science and Technology Beijing、Beijing 100083、PR China 2 Nuclear Equipment Division、Beijing Institute of Nuclear Engineering、China Nuclear Power Engineering Co.、Ltd.、Beijing 100840、PR China 3 Division of Surface & Corrosion Science、Dept. of Chemistry、School of Chemistry、Biotechnology and Health、KTH Royal Institute of Technology、SE-100 44、Stockholm
关键词
收录来源
International Corrosion Congress · 第22届国际腐蚀大会
摘要
The corrosion behavior of B4C/6061Al in deionized water and different H3BO3 concentrations (500, 2500, 5000 and 10000 ppm) and temperatures (20 ° C, 50 ° C and 90 ° C) was investigated by combining experimental and modelling studies. In deionized water B4C/6061Al forms γ-AlOOH and Al(OH)3. Increasing temperature will promote γ-AlOOH formation whereas an increase in H3BO3 concentration will dissolve corrosion products. The corrosion resistance decreases from 20 ° C to 50 ° C but increases at 90 ° C, peaking at 2500 ppm H3BO3 for all temperatures. B4C particles in the aluminum matrix cause micro-galvanic effects, increasing the corrosion rate.