钐对铜电积用铅基阳极性能的影响

采用二步重熔法制备了不同钐含量的Pb-Sm合金,并考察了钐含量对合金的力学性能、耐腐蚀性能和阳极电位的影响。结果表明,合金抗拉强度随钐含量增大而增大,当钐含量达到0.5%时,抗拉强度为13.9MPa,比纯铅提高了21.9%,当钐含量超过1.0%后,继续提高合金中钐含量,合金抗拉强度提高幅度减缓。当合金中钐含量为0.5%时腐蚀速率比纯铅增加了0.76%,但不会对铅基阳极腐蚀性能产生明显影响。合金电极的阳极稳定电位随钐含量的增加而减小。

Effect of Sm on Property of Pb-base Anode for Copper Electrowinning

Pb-Sm alloy anodes with different Sm content were prepared by two step remelting process. The effects of Sm contents on tensile strength, corrosion resistance and anode potential of Pb-Sm anodes were investigated. The results show that tensile strength rises with increases of Sm content. With mass fraction of Sm of 0.5%, tensile strength of alloy reaches 13.9 MPa increased by 21.9% compared with pure lead anode. With Sm content exceeding 1.0%, the improving extent of tensile strength slows down. With mass fraction of Sm of 0.5%, corrosion rate of alloy rises by 0.76% compared with pure lead anode, which has no obvious effect on corrosion property of anode. The anode stable potential reduces with increase of Sm content.