PFA 9810T Powder Topcoat

PFA 9810T is a natural-color fluoropolymer powder topcoat designed for thick-film non-stick and corrosion-resistant coating systems.

The coating provides a combination of high toughness, low surface adhesion, good film formation and strong barrier performance. After proper electrostatic spraying and controlled baking, the powder melts and levels to form a smooth, continuous PFA coating layer.

PFA 9810T is suitable for metal components requiring protection against corrosive chemicals, surface adhesion and elevated operating temperatures. Through multiple coating and baking cycles, the total coating thickness can reach approximately 300 μm or more, depending on the substrate, primer system, component geometry and application process.

The product is designed for use with compatible PFA primers, including black and green primer options.

Key Features

• High PFA content
• Excellent chemical and corrosion resistance
• Strong barrier performance
• Smooth and continuous film formation
• Good leveling performance
• Low-adhesion and non-stick surface
• High toughness
• Suitable for multilayer thick-film systems
• Total coating thickness up to approximately 300 μm
• Suitable for electrostatic powder spraying
• Fluidized-bed application can be evaluated
• Designed for use with compatible PFA primers

Typical Physical Properties

The listed values are typical reference data and should not automatically be treated as guaranteed finished-coating specifications.

Compatible Primer System

PFA 9810T should be applied over a compatible primer to improve adhesion to the metal substrate.

Available primer options include:

• Black PFA primer
• Green PFA primer
• Other compatible primer systems subject to evaluation

A typical coating structure includes:

1. Prepared metal substrate
2. Compatible PFA primer
3. PFA 9810T powder topcoat
4. Additional topcoat layers where required
5. Final melting and inspection

The primer should be selected according to the substrate, operating medium, coating thickness and intended application.

Surface Preparation

The coating performance depends heavily on correct substrate preparation.

Recommended steps include:

• Remove oil, grease and surface contamination
• Degrease the substrate thoroughly
• Sandblast where required
• Remove dust and residual abrasive
• Apply the compatible primer uniformly
• Avoid contamination before topcoat application

Poor surface preparation may cause:

• Weak adhesion
• Pinholes
• Bubbling
• Delamination
• Uneven film thickness
• Premature coating failure

Powder Sieving

If the powder contains agglomerated particles, it can be screened before application.

Recommended screening options:

• 60-mesh stainless-steel screen
• 80-mesh stainless-steel screen

The screen and handling equipment must be clean and free from oil, moisture and incompatible powder residues.

Application Equipment

PFA 9810T can be applied using:

• Conventional industrial electrostatic powder-spray equipment
• Fluidized-bed coating equipment, subject to the component and process

For electrostatic spraying, the voltage should be kept only as high as necessary to maintain stable powder charging and deposition.

Excessive powder accumulation may cause:

• Foaming
• Uneven film thickness
• Poor leveling
• Trapped air
• Surface defects

The coating should be applied in controlled, uniform layers rather than depositing excessive powder in a single pass.

Recommended Application Process

Initial Topcoat Application

The powder may be sprayed directly over the wet primer film and then baked.

Reference baking conditions:

• Metal surface temperature: approximately 380–400°C
• Holding time: approximately 10–15 minutes

All stated temperatures refer to the actual metal surface temperature rather than only the oven-air temperature.

Recoating Process

For multilayer coating:

1. Apply one controlled layer of PFA powder.
2. Bake at approximately 370–390°C for 10–15 minutes.
3. Remove the component after the coating has melted correctly.
4. Apply the next powder layer while following the validated recoating process.
5. Repeat until the required total thickness is achieved.

The exact baking cycle depends on:

• Substrate material
• Component thickness
• Part geometry
• Oven performance
• Primer type
• Layer thickness
• Required final coating properties

Recommended Film Thickness

Applying excessively thick layers in one coating cycle may increase the risk of:

• Foaming
• Pinholes
• Incomplete melting
• Uneven film thickness
• Internal stress
• Delamination

Multiple controlled coating cycles are generally preferred for thick-film applications.

Typical Applications

PFA 9810T can be used for coating:

• Chemical tanks
• Process vessels
• Pipes and fittings
• Valve bodies
• Pump components
• Chemical containers
• Laboratory equipment
• Industrial trays
• Hoppers
• Mixing components
• Heating equipment parts
• High-temperature non-stick components
• Corrosion-resistant metal assemblies

Final suitability depends on the contacted chemical, concentration, pressure, temperature and coating-system design.

Main Application Benefits

Corrosion Protection

The melted PFA film creates a barrier between the metal substrate and corrosive process media.

Non-Stick Performance

The low-surface-energy coating helps reduce adhesion of process materials and may simplify cleaning.

Thick-Film Capability

Multiple layers can be applied to increase coating thickness and improve barrier protection.

High-Temperature Performance

The finished PFA coating can be used in elevated-temperature environments, subject to the coating structure, substrate and operating conditions.

Smooth Surface Finish

Correct spraying and baking can produce a smooth, uniform coating with good leveling.

Storage and Stability

• Store in sealed original packaging
• Recommended storage temperature: 10–30°C
• Keep the powder dry
• Protect from moisture and contamination
• Keep away from excessive heat
• Avoid direct sunlight
• Keep the package tightly closed after use

When stored correctly in a sealed and dry environment, the powder can maintain long-term stability.

Handling Damp or Caked Powder

If the powder becomes damp or lightly caked during long-term storage:

1. Dry it at approximately 80–100°C under controlled conditions.
2. Allow the powder to cool in a clean and dry environment.
3. Screen it using a clean 100–150 mesh stainless-steel screen.
4. Conduct a coating trial before returning it to production use.

Severely contaminated or degraded material should not be used without technical evaluation.

Quality Control

Inspection may include:

• Powder appearance
• Particle-size distribution
• Color
• PFA content
• Density
• Coating thickness
• Surface appearance
• Leveling
• Adhesion
• Pinholes
• Spark or holiday testing
• Chemical-resistance testing
• Batch identification
• Packaging inspection

Testing methods and acceptance criteria should be agreed upon before production.