EFFECT OF β-QUENCHING ON THE CORROSION RESISTANCE OF Zr-4 ALLOY IN LiOH AQUEOUS SOLUTION
SHEN Yuefeng1), YAO Meiy1, 2)i, ZHANG Xin1), LI Qiang1, 2), ZHOU Bangxin1, 2), ZHAO Wenjin3)
1) Institute of Materials, Shanghai University, Shanghai 200072
2) Laboratory for Microstructures, Shanghai University, Shanghai 200444
3) The Key Laboratory for Nuclear Fuel and Materials, Nuclear Power Institute of China, Chengdu 610041
Cite this article:
SHEN Yuefeng YAO Meiyi ZHANG Xin LI Qiang ZHOU Bangxin ZHAO Wenjin. EFFECT OF β-QUENCHING ON THE CORROSION RESISTANCE OF Zr-4 ALLOY IN LiOH AQUEOUS SOLUTION. Acta Metall Sin, 2011, 47(7): 899-904.
Abstract To investigate the effect of $\beta$--quenching on the corrosion behavior, Zr--4 specimens were
$\beta$--quenched and subsequently annealed at 480---600 ℃ for 2---200 h. The corrosion tests were carried out in
0.01 mol/L LiOH aqueous solution at 360 ℃/18.6 MPa. The microstructure of Zr--4 specimens and fracture
surface morphology of oxide films on the corroded specimens were observed by TEM and HRSEM,
respectively. The results show that Zr--4 specimens exhibit excellent corrosion resistance as Zr--Sn--Nb
alloys in LiOH aqueous solution after increasing the solid solution content of Fe and Cr in $\alpha$--Zr matrix by
suitable quenching rate from $\beta$--phase to avoid the formation of $\beta$--Zr.
When the cooling rate is too fast, the specimens show worse corrosion resistance due to the formation
Supported by Defense Technology Key Laboratory Fund Project (No.9140C70040108C70), National\par Natural Science Foundation of China (No.50971084), High Technology Research and Development Program of China (No.2008AA031701), Natural Science Foundation of Shanghai (No.09ZR1411700) and Shanghai Leading Academic Discipline Project No.S30107)
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