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

Figure 8

Scanning electron micrographs (backscattered electrons) of the surface and cross section of sealing coatings formed on AZ91 magnesium alloy with 12 g/l of La(NO₃)₃ at 30°C for 10 minutes (a-b) and 30 minutes (c-d).