Powder Coating

As a purchaser of powder coating services, you deserve the highest quality work done at competitive prices on your time schedule. This is what Smisen is prepared to deliver to all of our customers, from prototype to production runs.

Our in-house powder coating plant ensures tight control on both efficiency and delivery, and guarantees that quality remains our highest priority.

Electrostatic spraying is the most widely used method of applying powder-coating materials. This process is the most efficient and effective means of applying powder coatings.

Powder Application Process

The most common way of applying the powder coating to metal objects is to spray the powder using an electrostatic gun. The gun imparts a positive electric charge on the powder, which is then sprayed towards the grounded object by mechanical or compressed air spraying and then accelerated toward the workpiece by the powerful electrostatic charge.

Powder Curing Process

When a thermoset powder is exposed to an elevated temperature, it begins to melt, flows out and then chemically reacts to form a higher molecular weight polymer in a network-like structure. This cure process requires a certain threshold of temperature for a certain length of time in order to reach full cure and establish the full film properties for which the material was designed. Normally the powders cure at 125°C in 10 minutes.

Powder Coating Facility
  • Accommodating parts up to 1900mm long, 2400mm high, and 1400mm wide
  • Batch Type powder coating line
  • Up to 2000 kg per shift capacity

We have a spectrum of RAL colours, finishes and textures ensuring whatever your requirements, we can deliver the highest quality end product. Powder coating textures range from smooth glossy finishes to matte, textured, or wrinkled finishes. Thick coatings are easily achieved easily through powder coating processes.

Typical Powder Coatings Available
  • Epoxy - Excellent corrosion resistance, toughness, adhesion and hardness. Poor weatherability. Can be formulated to be FDA compliant for food contact applications. Decorative or functional coatings available.
  • Epoxy/Polyester Hybrid - Less susceptible to yellowing when cured. Exhibits similar properties to standard epoxy coatings. Poor weatherability makes this unsuitable for outdoor use.
  • Polyester/Urethane - Smooth, thin film with excellent mar and chip resistance and good weatherability. These coatings are generally resistant to diluted acids, hydrocarbons and grease and oil.
  • Polyester/TGIC - Excellent weatherability with excellent mar, chip and corrosion resistance. Excellent edge coverage.
  • Thermoplastic Powder Coatings - Vinyls and PVC powder coatings have a soft feel with good resistance to detergents. Good weatherability allows these coatings to be used in outdoor applications.
Powder Coating Testing & Quality Assurance
Coating Thickness Gauge Test

Coatings are designed to perform their intended function best when applied within a tight thickness range as specified. This ensures optimum product performance. Powder Coating thickness may also affect the application's impact resistance, flexibility, hardness, edge coverage, chip resistance, weathering, resistance to salt spray, and ability to retain gloss.

To make sure that the thickness of the coating conforms to the mentioned specs, we conduct a Coating Thickness Gauge Test on the powder coated products to accurately & quickly measure the coating thickness of the metals surfaces.

Coating Drop/Impact Test

Surface coatings are subjected to mechanical damage by impact which can deform the coating and/or substrate. Applying a variable range of impact load allows for coatings to be tested for elasticity, brittleness and adhesion to the substrate.

Salt Spray Test

The salt spray test is a standardized test method used to check corrosion resistance of coated samples. Coatings provide corrosion resistance to metallic parts made of steel, or brass. Salt spray test is an accelerated corrosion test that produces a corrosive attack to the coated samples in order to predict its suitability in use as a protective finish.