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采用真空非自耗电弧熔炼方法制备了4种不同Mo含量的Zr-0.4Fe-1.0Cr-xMo(x=0,0.2,0.4,0.6,质量分数,%)合金材料,研究了其在500℃,10.3 MPa过热水蒸汽中的耐腐蚀性能以及添加Mo对合金耐腐蚀性能的影响.结果表明,Zr-0.4Fe-1.0Cr-xMo合金中含有大量细小的第二相粒子,其腐蚀速率远远低于Zr-4,N18和M5合金.Mo的添加促进了氧化膜生长过程中的演变,降低了耐腐蚀性能.不含Mo合金的氧化膜生长动力学在整个腐蚀周期(2000 h)内一直保持近似立方规律,而含Mo合金的氧化膜生长动力学在500-1000 h内由近似立方规律向直线规律转变.
Four kinds of Zr-0.4Fe-1.0Cr-xMo (x = 0,0.2,0.4,0.6, mass fraction,%) alloy materials with different Mo content were prepared by vacuum non-consumable arc melting method. ℃ and 10.3 MPa, and the effect of adding Mo on the corrosion resistance of the alloy was also studied.The results show that the Zr-0.4Fe-1.0Cr-xMo alloy contains a large number of fine second phase particles, the corrosion rate Which is much lower than that of Zr-4, N18 and M5 alloys. The addition of Mo promotes the evolution of the oxide film during the growth and reduces the corrosion resistance.The growth kinetics of the oxide film without Mo alloy during the whole corrosion period (2000 h) Within the law has been maintained almost cubic, and Mo-containing oxide film growth kinetics within the 500-1000 h from the approximate cubic law to a straight line changes.