Epoxy Anti-Corrosion Powder Coating for Firefighting Pipes

Surface Finish Options Overview

Product Introduction:

This product is formulated using linear phenolic epoxy resin, polyurethane-modified epoxy resin, and advanced curing agents, designed and manufactured based on the latest formulation concepts. It features high reactivity, strong adhesion, high cross-link density, and excellent resistance to chemicals, solvents, cathodic disbondment, impact, and high temperatures.

Product Usage:

For internal and external anti-corrosion coatings of water supply pipes used in firefighting systems.

Product Features:

1. Excellent adhesion to the substrate.
2. Strong anti-corrosion capability.
3. Good leveling, high gloss, and dense coating.
4. Superior high-temperature cathodic disbondment resistance.
5. Extremely strong flexibility, capable of passing the 4/5 flattening and post-grooving tests.
6. Good performance in withstanding high and low temperatures.
7. Strong resistance to boiling water.

Powder Performance:

Property	Specification	Notes
Adhesion	Excellent
Corrosion Resistance	Superior
Leveling	Good, high gloss, dense coating
Cathodic Disbondment Resistance	Excellent at high temperatures
Flexibility	Extremely strong, passes 4/5 flattening and post-grooving tests
Temperature Resistance	Good performance in high and low temperatures
Boiling Water Resistance	Strong resistance

Curing Conditions:

Property	Specification	Notes
Temperature	Referenced to workpiece temperature	Deviations may affect performance
Heating Method	Medium-frequency heating or other heating methods

Application Parameters:

Parameter	Specification	Notes
Applicable Equipment	Frictional charging spray, corona electrostatic spray, dip coating
Film Thickness	150-450um	Adjustable according to workpiece requirements

Health and Safety:

Property	Specification	Notes
Toxicity	Non-toxic
Flammability	Non-flammable
Regulation	GB15607-1995	Coating operation safety regulations

Precautions:

Item	Specification	Notes
Outdoor Use	Not recommended	May cause fading and chalking
Surface Preparation	Oil-free, water-free, surface treatment to Sa21/2 level (GB/T8923), anchor pattern depth 40-100um, clean surface from dust and abrasives
Preheating	Temperature controlled between 180-240°C
Storage	Ventilated, dry, below 30°C, away from heat sources, corrosive chemicals, and solvents, avoid strong light, maximum stack height 4 layers, avoid long-term pressure, keep packaging sealed
Curing Temperature	Preheat steel pipe surface to above 200°C for better curing completion rate

Compliance Standards:

GB/T 5135.20-2010 “Coated Steel Pipes for Automatic Sprinkler Fire-Protection Systems”;
CJ/T 120-2008 “Plastic-Coated Composite Steel Pipes for Water Supply”

Types of powder coating

Powder coatings can be categorized by resin system (epoxy, polyester, hybrid, polyurethane), appearance (smooth, texture, hammer, metallic, pearlescent), or performance level (anti-corrosion, heat-resistant, UV-resistant, architectural grade, automotive grade).

Powder coating colours and effects

Powder coatings offer thousands of colors in gloss, matte, satin, metallic, candy, texture, wrinkle, hammer tone, wood grain, fluorescent, and other custom effects. Special powders can create soft-touch, anti-scratch, anti-fingerprint, or anti-graffiti surfaces.

Powder coating process

The process generally includes surface pretreatment (degreasing, phosphating, chromating, sandblasting), drying, electrostatic spraying, curing in an oven, and cooling. A well-controlled pretreatment and curing process ensures strong adhesion and long service life.

Powder coating benefits

Powder coatings are environmentally friendly, solvent-free, and produce minimal waste. They offer excellent corrosion resistance, weather durability, mechanical strength, and uniform film appearance. The coating is tough, impact-resistant, scratch-resistant, and has a long lifespan.

Applications for Powder Coatings

Powder coatings are widely used in appliances, aluminum profiles, architectural components, automotive parts, bicycles, furniture, outdoor equipment, machinery, electrical cabinets, pipeline systems, and general industrial and consumer goods.

FAQ

What is Powder Coating?

Powder coating is a dry finishing technology where finely ground powder is electrostatically sprayed onto a metal or non-metal surface and then cured at high temperature. After curing, the powder melts into a continuous, durable, and decorative coating layer.

What does powder coating do?

Powder coating protects the substrate from corrosion, weathering, chemical attack, and mechanical wear. It also provides decorative appearance with rich colors, gloss levels, textures, and special effects.

Is powder coating better than paint?

In many industrial applications, powder coating outperforms liquid paint. It forms a thicker and tougher coating, resists corrosion and chemicals better, and does not contain VOCs. It also provides excellent consistency and cost-effective mass production.

Why is it called powder coating?

It is called powder coating because the coating material is a solid powder instead of a liquid paint. The coating is formed by melting and curing powder particles under heat.

What are the different types of powder coating?

Powder coatings include several families depending on resin chemistry:

• Epoxy powders

• Polyester powders

• Epoxy-polyester hybrid powders

• Polyurethane powders

• Acrylic powders

• Fluorocarbon (PVDF) powders

Each type has its own performance features such as corrosion resistance, UV resistance, chemical resistance, outdoor durability, or decorative properties.

Which material is used in powder coating?

Powder coatings are based on thermoset or thermoplastic resins combined with pigments, curing agents, fillers, additives, and in some cases metallic or effect particles. Common substrates include steel, aluminum, galvanized metal, MDF, and certain heat-resistant plastics.

How long will powder coating last?

The lifespan depends on powder type, film thickness, application method, pretreatment, and service environment. Indoor coatings can last more than 10–20 years. High-grade outdoor polyester or fluorocarbon powders can last 15–25 years or longer under UV exposure.