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The Basics & Importance of Surface Preparation

Surface preparation procedure of treating the surface of a substance to increase adhesion to coating. The most important function that effects coating performance is the quality of surface preparation. This procedure can be done mechanically or chemically. This is also known as grit blasting. The surfaces that are most commonly prepared are:

  • Steel
  • Wood
  • Plastic
  • Concrete
  • Aluminium

Selecting the right paint for your project is crucial, but the condition of the surface you will apply it to is even more important. In fact, over 75% of all early coating failures can be linked to surface preparation that is incomplete.

The requirement to remove flaky and loose pieces is obvious, if it is painted over, the pieces will eventually come off and so will the paint. Even very small bits of grease, dirt or grime is able to interfere with the ability of the coating to properly stick to the surface. Even though the surface appears to be clean, it truly may not be.

Irrespective of the condition of the surface, the initial step should always be to wash and rinse it and follow minimal preparation steps. This minimal surface preparation is usually a twostep procedure:

Step 1: The surface is needed to be washed with a cleaning solution in order to remove all grease, oil and other surface toxins.

Step 2: If there is loose rust or other materials such as the previous coating, remove using mechanical solution such as sanding blocks, wire brushes, putty knives and paint scrapers.

When a surface is clean and only adherent material remains, it is truly clean. Rust, paint and mill scales are considered adherent if they are not able to be removed by lifting will a putty knife using moderate pressure. This is sound rust. The surface is ready to paint with a primer suitable for direct application to sound rust.

Here at Total Blasting, we offer excellent quality products at competitive prices. With over 30 years’ experience in the surface preparation industry. Visit our website and enquire online for more information today!

 

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