Industrial anti-corrosion coatings come in many varieties. When selecting, consider the corrosion environment, substrate type, service life requirements, and application conditions to design a compatible primer-midcoat-topcoat system.
Step 1: Determine the corrosion environment category. According to ISO 12944, corrosion environments are classified from C1 (very low) to C5 (very high), plus Im (immersion in seawater). Different categories require specific coating systems and film thicknesses.
Step 2: Define service life requirements. Typically categorized as low (under 5 years), medium (5-15 years), or high (over 15 years). Higher service life requirements demand more robust coating system specifications.
Step 3: Select the coating type. Choose the appropriate primer, intermediate coat, and topcoat based on the corrosion environment and required service life. Common systems include: Epoxy zinc-rich primer + epoxy iron mica intermediate coat + polyurethane topcoat (suitable for C3–C4 environments); Epoxy zinc-rich primer + epoxy iron mica intermediate coat + fluorocarbon topcoat (suitable for C5 environments).
Step 4: Assess construction conditions. Consider temperature and humidity limits, drying time requirements, and available equipment. Some coatings have strict environmental requirements; select accordingly based on actual site conditions.
Step 5: Consider cost. Since coating prices vary significantly, choose the most cost-effective option that meets your protection requirements.
CASUL Coatings has a professional technical team that recommends the most suitable anti-corrosion coating system tailored to your specific operating conditions.