Powder

Coating

A type of coating that is applied as a free-flowing, dry powder. Unlike conventional liquid paint which is delivered via an evaporating solvent, powder coating is typically applied electrostatically and then cured under heat or with ultraviolet light.  

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Powder

Coating

A type of coating that is applied as a free-flowing, dry powder. Unlike conventional liquid paint which is delivered via an evaporating solvent, powder coating is typically applied electrostatically and then cured under heat or with ultraviolet light.  

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Plant and working procedures

Preparation process

Powder coating is a coating which is applied on the job in a powder form, it does not require any liquid carrier while the paint can be applied on a job in a liquid form only and requires the liquid carrier which causes the dropping sag, run and storage problem etc. It is a dry paint, which gives almost 100% finish maximum material use with no wastage in over spray, spillage etc.

powder coating oven

Wash bay preparation

  • Powder plant receives incoming job
  • Material/job is inspected and signed for by supervisor
  • Parts are then put through 7 stage wash system by operator
  • Operator pack parts in designated area

Powder coating procedure

  • Production supervisor is given colour finish instructions
  • Powder material is drawn from stores and batch numbers are allocated
  • Linesman clean and prepare the parts and ensure all welds and joints are clear from dust and grit. All exposed threads are covered with masking tape
  • Production supervisor checks oven temperature and line speed is at correct settings for the parts
  • Parts are then put through the paint and bake process
  • Production supervisor inspects completed parts for correct finish and paint thickness
  • Production supervisor performs hatch test if required by instruction
  • Hatch test sample is kept for reference
  • Parts are then placed in storage area

Assembly procedure

  • Assembly supervisor is given job instruction
  • Relevant parts are drawn for packing area
  • Assembly team complete the job
  • Each assembly work completes a quality control form and then signs off on the job
  • Job is then stored in despatch bay

Powder coating preparation

Pre Inspection

The job is inspected for fit and finish to ensure all components are fitted to final product.

Degreasing Bath

The product is submerged for 20 minutes in a degreasing solution at a temperature of 60 Degree Celsius. This removes all grease and oils. Then the product is rinsed in a clean water tank to remove excess chemicals.

Descaling Bath

The product is submerged for 30 minutes in a Acid solution at a temperature of 50 Degree Celsius. This removes all the scale from the steel. Then the product is rinsed in a clean water tank to remove excess chemicals.

Zinc Phosphate Bath

The product is submerged for 15 minutes in a Zinc Phosphate solution at a temperature of 60 Degree Celsius. This adds a fine corrosion resistant coating. Then the product is rinsed in a clean water tank to remove excess chemicals.

Sealant Bath

The product is submerged for 10 minutes in a sealing solution at a temperature of 50 Degree Celsius. This adds a final coat to seal the product and allows for better adhesion when applying the powder.