Sealing of PEO Coated AZ91 Magnesium Alloy Using La-Based Solutions

Figure 15

Scanning electron micrographs (backscattered electrons) of the surface of the samples before and after 7 days of immersion. In detail PEO treated before (a) and after (b) immersion, sealed at 30°C for 10 min before (c) and after (d) immersion, and sealed at 50°C for 30 min before (e) and after (f) immersion.