Effect of Equal-Channel Angular Pressing on Pitting Corrosion of Pure Aluminum

Figure 4

Morphology of Al after anodic oxidation for 5 min at 0.3 V nobler than the pitting corrosion potential in a solution containing 0.1 mol·dm⁻³ of Na₂SO₄ and 300 ppm of Cl⁻. (a, b) Pure Al without ECAP. (c, d) Pure Al with ECAP.

(a)

(b)

(c)

(d)