Galvanizing procedure

Like most coating processes the secret to achieving a good quality coating lies in the preparation of the surface. Following items describe the steps for metal surface preparation before starting the painting on surface. This can definite total in 3 steps:

  1. Washing and cleaning the surface of iron parts with degreasing solution by hand. This     step helps to better result in the next step.
  2. Moving metallic components in phosphate processing part and washing the surface with solution of phosphate and water by hand in all side.
  3. Drying the water and wet for 20-120 min. (drying time must not be less than 20 min)

Painting procedure

After the preparation, surface painting steps shall be started. Procedure that use for painting is inclusive 2 steps.

  • spray the polyester powder type color with electrostatic gun to surface with regulated voltage and suitable distance between gun head and surface.
  • move the painting surface in the warm cabin for 10-15 min. (Tem. Approximately190-210◦C)

Quality Control Procedure

  1. Visual check:

Complete cured coating surface with suitable film thickness checked by naked eyes, such as bit, crater, haze, and flow-out.

2. Film thickness DIN EN ISO 2360:

Film thickness tester describes a method for non-destructive measurements of the thickness of non–conductive coatings on electrically conductive (generally metallic) basis materials, using amplitude–sensitive eddy current instruments.

3. Color ISO 7724:

Color RAL Coating film shall be selected according to the document and owner request.

4. Adhesion Test DIN EN ISO 2409:

In the paint industries the principle concern with respect to adhesion is that of a coating remaining firmly attached to the substrate. One simple test to evaluate this is the cross-cut adhesion test. In this test the painted panel is subjected to a series of cross cuts at right angles to each other on the surface each series at a distance of 2mm apart. The amount of paint which is removed by brushing the surface is compared to a set of standards. This test is carried out using adhesive tape which is attached to the surface and then pulled away.

Surface preparation & painting procedures