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探讨了铝中夹杂物含量对组织、电化学性能和力学性能的影响。采用逐渐增加铝屑量的方法,向铝熔体中引入夹杂物,对夹杂物的形态进行了金相观察;测试了材料的极化曲线,得出合金的自腐蚀电位Ek、自腐蚀电流icoor;测试了不同铝屑含量下材料的硬度及抗拉强度,对比了材料的延展性。试验结果表明,随着铝屑加入量的增加,夹杂物逐渐增加;试验材料的极化曲线随着铝屑的增加,逐渐右移,线性极化电阻由大变小,自腐蚀电位逐渐向负方向移动,自腐蚀电流变大,表明材料耐腐蚀性能随着夹杂物的增加而下降;材料的硬度和抗拉强度增加,延展性降低,塑性变差。
The effects of inclusions in aluminum on microstructure, electrochemical properties and mechanical properties were discussed. Adopting the method of increasing the amount of aluminum scrap, the inclusions were introduced into the aluminum melt and the morphology of the inclusions was observed metallographically. The polarization curve of the material was tested and the self-corrosion potential Ek and icoc The hardness and tensile strength of the material under different aluminum content were tested, and the ductility of the material was compared. The experimental results show that the inclusions increase gradually with the addition of aluminum scrap. The polarization curve of the test material gradually shifts to the right with the increase of aluminum flake. The linear polarization resistance decreases from large to small and the corrosion potential gradually decreases to negative The direction of movement, self-corrosion current becomes larger, indicating that the corrosion resistance of the material decreases with the increase of inclusions; the hardness and tensile strength of the material increases, the ductility decreases, and the plasticity deteriorates.