The aluminum-based coating was sprayed onto a substrate made of MA5 magnesium alloy by detonation and thermal vacuum methods. Potentiodynamic polarization studies were carried out to evaluate corrosion resistance of the modified surfaces. Thermal vacuum coating is non-porous, but thin (approx. 50 μm). The plasma-electrolytic oxidation (PEO) layer of the aluminum coating almost does not interact with the magnesium base during the process of synthesizing the oxide ceramic coating. The corrosion resistance of the detonation coating was twice as high as that of the MA5 magnesium alloy, but the layer synthesized on the PEO coating neutralized this effect. This is related with the growth of the PEO layer through the sprayed coating (thickness approx. 200 μm) to the base and the presence of through pores in it, which over time causes the spalling of such a combined coating. The opposite electrochemical picture is observed on the surface of the thermal vacuum sprayed coating without and with the presence of the PEO layer on it. Here the corrosion currents are lower in 25 times and by 2 orders of magnitude, respectively. Such a significant difference in the corrosion resistance of aluminum coatings is caused by their porosity and structural defects due to the peculiarities of the technological process.

采用爆炸法和热真空法将铝基涂层喷涂到MA5镁合金基材上。进行动电位极化研究以评估改性表面的耐腐蚀性。热真空镀膜无孔，但很薄（约 50 μm）。在合成氧化物陶瓷涂层的过程中，铝涂层的等​​离子体电解氧化（PEO）层几乎不与镁基发生相互作用。爆炸涂层的耐腐蚀性是 MA5 镁合金的两倍，但 PEO 涂层上合成的层抵消了这种影响。这与 PEO 层通过喷涂涂层（厚度约 200 μm）生长到基底以及其中存在通孔有关，随着时间的推移，会导致这种组合涂层剥落。在热真空喷涂涂层的表面上观察到没有和有PEO层的情况相反的电化学图。这里的腐蚀电流分别降低了 25 倍和 2 个数量级。铝镀层耐腐蚀性能如此显着的差异是由于其工艺过程的特殊性造成的孔隙率和结构缺陷造成的。