Improvement of the Corrosion Resistance of Aluminium Alloys Applying Diff erent Types of Silanes - Advanced Materials for Agriculture, Food and Environmental Safety - page 48

Figure 2.7 SEM of the FIB cross-section of anodized AA-2024 without HTS and
treated with bis-sulfur silane 5% (20000x), anodic layer ≈ 2.6 μm. No i lling of the pores.
Conversion layer is very thin (≈ 360 nm).
Figure 2.8 SEM of the FIB cross-section for anodized AA-2024 without HTS and treated
with BTSE 5% (20000x), anodic layer ≈ 2.5μm, sealing layer is very thin. No i lling of the
pores. Conversion layer is very thin. (≈ 260 nm).
Figure 2.9 SEM of the FIB cross-section for anodized AA-2024 + HTS and treated with
a mixture of bis-amino silane and VTAS (20000x), anodic layer ≈ 2.5 μm, sealing layer is
very thin. No complete i lling of the pores. Conversion layer is very thin.