采用XRD，OM,SEM,EDS和电化学等方法，研究了镍含量对AlMgZnSnCuMnNix高熵合金相结构、显微组织和电化学性能的影响。结果表明，当镍含量较低时，合金由FCC(面心立方)相、四方相以及少量未知结构组成。随着镍含量的增加，四方相消失。AlMgZnSnCuMnNi合金显微组织的均匀性优于AlMgZnSnCuMn合金，在两种合金中，每个区域都由多种元素组成，不存在单一元素组成的区域。当镍含量较高时，在自腐蚀电位以上较宽的电位范围内，出现了明显的钝化区间。AlMgZnSnCuMnNix合金的自腐蚀电位都比较低。随着镍含量增加，合金的自腐蚀电位整体来讲是上升的，从-1.429 V(vs. SCE,下同)上升到-1.029 V。自腐蚀电流密度从x=0时的2.41×10-4 A/cm2降低到x=1时的1.13×10-5 A/cm2。

The effects of Ni content on the variation of phase structure, microstructure and electrochemical properties of AlMgZnSnCuMnNix high-entropy alloys were investigated by XRD, OM, SEM, EDS and electrochemical testing. The results showed that the alloys were composed of FCC， tetragonal and a small amount of unknown structure phases when the content of Ni was low. The tetragonal phase disappeared with the increase of Ni content. The microstructure uniformity of AlMgZnSnCuMnNi alloy was better than that of AlMgZnSnCuMn alloy. In the two kinds of alloy, each region had a variety of elements. There was no region consisted of single element. When the content of Ni was high, there was an obvious passivation range in a wide range of potential above the self-corrosion potential. The AlMgZnSnCuMnNix alloys exhibited lower self-corrosion potential. With the addition of Ni from x=0 to 1.0, the self-corrosion potential of the alloys increased gradually from -1.429 V(vs. SCE) to -1.029 V and the current density decreased from 2.41×10-4 A/cm2 to 1.13×10-5 A/cm2 correspondingly.