Effect of the Electrolyte Temperature and the Current Density on a Layer Microhardness Generated by the Anodic Aluminium Oxidation

Figure 10

The dependence of the layer microhardness on the electrolyte temperature: c(H₂SO₄) = 1.99 mol·L⁻¹, c(C₂H₂O₄) = 0.06 mol·L⁻¹, U = 8.5 V, t = 20 min. (a) 1 A·dm⁻², (b) 3 A·dm⁻², and (c) 5 A·dm⁻².