The effect of the electrolyte composition for hard anodizing of aluminum on the corrosion resistance of the synthesized anodic coatings was studied. The hard anodizing was carried out at temperatures of –4–0°C for 60 min at a current density of 5 A/ dm² . The basic electrolyte was a 20% aqueous solution of H₂SO₄ . Hydrogen peroxide (H₂O₂) was added to the electrolyte in concentrations of 30; 50; 70 and 100 g/L to determine strong oxidants influence on the characteristics of the anode layers. The concentration of 70 g/L H₂O₂ in the electrolyte, which ensures the synthesis of the thickest and least porous coating, was optimal. At the initial moment of immersion of anodic coatings synthesized in hydrogen peroxide electrolyte, their corrosion resistance decreases. When peroxide electrolyte concentration increases from 30 to 100 g/L, corrosion currents increase by 30 and 90%, respectively. However, with increasing exposure of coatings in the environment, their corrosion current density decreases more intensively with a decrease in their porosity. After 14 days, no dependence of the coatings corrosion durability on the composition of the electrolyte observed, what indicated a complete closure of the pores.

研究了铝硬质阳极氧化电解液成分对合成阳极镀层耐腐蚀性能的影响。硬质阳极氧化在–4–0°C 的温度下进行60 分钟，电流密度为5 A/dm ²。碱性电解质为20％的H ₂ SO ₄水溶液。将过氧化氢(H ₂ O ₂ )以30的浓度添加到电解液中； 50； 70 和 100 g/L 以确定强氧化剂对阳极层特性的影响。电解质中70 g/LH ₂ O ₂的浓度是最佳的，可确保合成最厚且孔隙最少的涂层。合成的阳极涂层在过氧化氢电解液中浸泡的最初时刻，其耐腐蚀性能下降。当过氧化物电解质浓度从30 g/L增加到100 g/L时，腐蚀电流分别增加30%和90%。然而，随着涂层在环境中暴露的增加，其腐蚀电流密度随着其孔隙率的降低而更加强烈地降低。 14 天后，没有观察到涂层耐腐蚀能力对电解质成分的依赖性，这表明孔完全闭合。