Surface Tolerant Epoxy Primer for Metal Surfaces DFP – 600

DryFiX DFP-600 Premium Surface Tolerant Anti-Corrosive Epoxy Primer

The Invincible Barrier Against Corrosion in Heavy Industry and Marine Projects

DryFiX DFP-600 is formulated to the highest engineering standards specifically for the most demanding site conditions where physical or environmental constraints prevent abrasive grid/shot-blasting, fine rust cannot be completely eradicated, and only mechanical cleaning (to St 2 - St 3 levels) is feasible. This premium, two-component, polyamide-cured epoxy primer is heavily fortified with anti-corrosive zinc phosphate pigments. Unlike standard paints, it passivates microscopic rust residues on the surface, halting the progression of corrosion (oxidation) at a cellular level.

It serves as the primary "corrosion shield" for the protection of steel structures, active ship decks, hatch covers, pier and bridge piers, petrochemical storage tanks, and pipelines exposed to severe marine conditions, dense industrial atmospheres, and aggressive chemical gases. Its "Surface Tolerance" capability—the ability to tolerate minor surface defects, moisture, and residues—minimizes surface preparation costs and downtime in mega-projects. Welding itself to the steel, it creates a flawless, inseparable adhesion bridge (load-bearing backbone) for subsequent polyurethane or epoxy topcoats.

DFP-600 Technical Specifications and Performance Values

Professional Application Instructions and Site Procedures

1. Steel Surface Condition and ISO/SSPC Surface Preparation Standards

Although DFP-600 is a "surface-tolerant" primer, this does not mean the substrate can be left heavily contaminated. For a long-lasting corrosion armor, it is critical that the underlying structure is sound and suitable for adhesion.

• Oil and Salt Removal: Steel surfaces must be completely degreased and cleaned of industrial dirt, grease, and especially invisible "marine salts" that penetrate the surface in marine projects, as these reduce adhesion to zero. Solvent cleaning (SSPC-SP 1) or high-pressure fresh water jetting must be utilized for this purpose.
• Mechanical Cleaning (Where Blasting is Not Possible): Loose rust, weld spatter, mill scale, and flaking old paint must be completely removed. In areas where open abrasive blasting (Sa 2.5) is not possible, meticulous mechanical cleaning to ISO 8501-1 St 2 or St 3 standards using wire brushes, pneumatic chippers, or grinders must be performed to achieve a sound, roughened steel profile.
• Previously Painted Surfaces: If the product is applied for corrosion repair over old but sound epoxy or polyurethane coatings, the existing paint surface must be abraded (via sweep-blasting or hand sanding) to remove the gloss and enhance adhesion.

2. Component Integration and Exothermic Reaction

DryFiX DFP-600 is a chemically cured, two-component reactive system. Mixing by estimation must be strictly avoided.

• Component A (Resin) is briefly mixed mechanically within its own bucket to ensure the complete and homogeneous distribution of heavy anti-corrosive zinc phosphate pigments and fillers that may have settled at the bottom.
• Subsequently, Component B (Hardener) is added into Component A, strictly adhering to the 7:1 weight ratio. The materials must never be arbitrarily divided.
• Using an ex-proof (non-sparking), low-speed mixer (300-400 rpm), the components are mixed continuously for at least 3-4 minutes until a smooth, uniform color consistency is achieved, taking care not to entrap air.
• The combination of the two products generates heat and initiates the curing process. The pot life of the material is 1 hour at +25°C. Only an amount of material that can be applied within this 1-hour window should be prepared, and application must proceed rapidly without leaving the mixture in the bucket.

3. Application System, Airless Dynamics, and the "Stripe Coat" Rule

• On massive steel structures, hatch covers, or bridge piers, the fastest, most homogeneous, and least wasteful application method is Airless Spray (Recommended Tip Size: 0.015" - 0.021", Pressure: 150 - 200 bar).
• Brushes and short-nap epoxy rollers should generally be reserved for local repairs, touch-ups, or stripe coating rather than large areas.
• Critical Site Rule (Stripe Coat): Corrosion always initiates at sharp points. Paint tends to pull away from bolt and nut heads, weld seams, rivets, flanges, and sharp steel edges due to surface tension as it dries. Therefore, prior to the general airless spray application, a generous "Stripe Coat" must be brushed well into these high-risk areas, providing extra protection to the weakest points of the steel.
• Unless otherwise specified in the project, the coating must be applied homogeneously without runs or sags to yield an average 40 microns Dry Film Thickness (DFT) per coat. Continuous measurements should be taken during application using Wet Film Thickness (WFT) gauges.

4. Critical Environmental Tolerances and Dew Point

• Application must take place when the ambient and steel surface temperatures are between +10°C and +45°C. At temperatures below +10°C, the chemical reaction of the polyamide hardener stalls, and curing will not occur.
• The relative humidity of the air must strictly not exceed 80%.
• To prevent condensation (invisible micro-sweating on the steel) and the formation of "flash rust" beneath the primer, the steel surface temperature must be at least 3°C above the currently measured Dew Point, verified with a digital hygrometer.

5. HSE (Health, Safety, Environment), Procedures, and Storage

• Containing high-performance industrial solvents, this product is strictly for professional shipyard, factory, and construction site use.
• Because the solvent vapors are heavier than air, they settle near the floor, posing a fire and explosion hazard. In confined spaces, inside tanks, or ship holds, exceptionally strong ex-proof (flameproof) mechanical ventilation must be provided, and the area must be kept free from static electricity and sparking tools.
• Skin and eye contact must be strictly avoided, and vapors must not be inhaled. A full-face respirator with active carbon filters, chemically resistant nitrile gloves, and anti-static coveralls must be worn. Always consult the Material Safety Data Sheet (MSDS) for emergencies, spills, and first aid.
• Product containers must be stored between +5°C and +35°C in dry, well-ventilated, enclosed storage areas away from direct sunlight.
• Immediately after application, before the material can cure, spray guns, hoses, and mixing equipment must be thoroughly flushed and cleaned with DryFiX Epoxy Thinner.