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

Table 2

Values of the corrosion current density and corrosion potential for samples sealed with 12 g/l of La(NO₃)₃ at different temperature and for different treatment times, after PEO treatment.

	(V)	(A/cm^2)
Untreated	−1.88	2.00 × 10^−5
PEO	−1.87	1.50 × 10^−6
12 g/l La 30°C 10 min	−1.73	8.00 × 10^−7
12 g/l La 30°C 30 min	−1.83	4.00 × 10^−7
12 g/l La 40°C 10 min	−1.82	5.00 × 10^−7
12 g/l La 40°C 30 min	−1.69	2.80 × 10^−7
12 g/l La 50°C 10 min	−1.73	9.00 × 10^−7
12 g/l La 50°C 30 min	−1.65	2.80 × 10^−7