Fig. 3From: Enhanced Corrosion Resistance of PVD-CrN Coatings by ALD Sealing LayersSEM surface images and cross-sectional images of the pure CrN and CrN hybrid coatings with various sealing layers. a, e, i CrN. b, f, j CrN-Al2O3. c, g, k CrN-TiO2. d, h, l CrN-Al2O3/TiO2. The corresponding AFM images were inserted in Fig. 3a–d Back to article page