(DPS) Dual-Layer Epoxy Anti-Corrosion Powder Coating

Surface Finish Options Overview

Product Introduction:

This dual-layer epoxy powder coating system is carefully formulated using special epoxy resins and functional curing agents. The base layer, like other epoxy anti-corrosion powder coatings, offers excellent anti-corrosion properties. The outer layer, while maintaining anti-corrosion properties, enhances protective performance. Compared to a three-layer PE structure, it offers a lower comprehensive anti-corrosion cost.

Product Usage:

Suitable for complex anti-corrosion environments, especially pipelines crossing through mountainous, river, and hilly areas.

Product Features:

1. Excellent adhesion between the base material and the epoxy layers.
2. Strong resistance to permeation and corrosion with high curing completion rate.
3. High hardness of the outer coating, dense coating, scratch-resistant, and good resistance to plant root penetration.
4. Excellent high-temperature cathodic disbondment resistance and superior mechanical properties.

Powder Performance:

Powder Coating Performance Parameters

Cured Powder Coating Performance Parameters

Execution Standard:

Q/CNPC 38-2002 “Technical Specification for Double Layer Fusion Bonded Epoxy Powder Coating on Steel Pipes”

Curing Conditions:

Application Parameters:

Storage Period:

1. The product can be stored for 6 months in dry conditions below 30°C.
2. The used coating must be re-sealed immediately to prevent moisture absorption affecting performance.
3. Packaging: 20kg paper boxes lined with plastic bags.

Health and Safety:

1. The product is non-toxic and non-flammable, but follow GB15607-1995 coating operation safety regulations when using.

Precautions:

1. The product is not recommended for outdoor use, as fading and chalking may occur with long-term outdoor exposure.
2. The steel pipe surface should be free of oil and moisture, with surface treatment quality reaching Sa21/2 level (GB/T8923), anchor pattern depth should be 40-100um, and the surface should be cleaned of dust and abrasives.
3. The product should be stored in a ventilated, dry, indoor environment below 30°C, away from heat sources, corrosive chemicals, and solvents, avoiding strong light; the maximum stacking height should not exceed 5 layers; avoid long-term pressure, ensure the packaging is sealed to prevent clumping and moisture absorption, affecting fluidization performance.