Research on Electrochemical Corrosion Behavior of Al-B4C Neutron Absorbing Materials
[Purposes]This paper aims to investigate the electrochemical corrosion performance of Al-B4C neutron absorbing material.[Methods]TheAl-B4C composites with different boron carbide contents were prepared by ball-milling powder-pressure forming-vacuum sintering.Then electrochemical corrosion experiments were tested on the electrochemical workstation.The corrosion solution is 5%NaCl solution.[Findings]The results show that:when the content of boron carbide is less than 30%,the corrosion resistance of the material gradually increases with the increase of the content of boron carbide,when the boron carbide content reaches 40%,the corrosion resistance of the material rapidly decreases,and the passivation phenomenon of the four materials occurred in their respective potential ranges.[Conclusions]The passivation phenomenon is most obvious when the content of boron carbide is 10%,and the material corrosion method is mainly pitting corrosion.
Al-B4 C compositesneutron absorber materialelectrochemical corrosionmicrostructure
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