Galvanized steel is steel dipped in molten zinc. This creates a fantastic rust-resistant barrier, but it also creates a surface that is chemically "active." The Soap Factory:
– Applies water-soluble resins formulated with chromium, often cured via baking. astm d2092 pdf
The ASTM D2092 standard is important for several reasons: Galvanized steel is steel dipped in molten zinc
| Method | Recommendation | Use Case | |--------|----------------|-----------| | Solvent Cleaning (SSPC-SP 1) | Remove oil, grease, and wax. | Mandatory before any other cleaning. | | Hand/Power Tool Cleaning (SSPC-SP 2/SP 3) | Limited effectiveness. | Small repairs only. | | Sweep Blasting (SSPC-SP 7 / NACE No. 4) | Light abrasive blast to create surface profile (0.5–1.5 mils). | Best adhesion for heavy-duty coatings. | | Chemical Treatment | Apply wash primer or phosphate conversion coating. | When blasting is not possible. | | Mandatory before any other cleaning