In painting, proper surface preparation (substrate treatment) is essential to achieve a good finish. The most effective method of surface preparation is blast treatment.
"Surface preparation" refers to the process of preparing the underlying material or substrate. Metals are melted, cooled, and solidified during the manufacturing process, but when exposed to high temperatures, they combine with oxygen in the atmosphere to form a film known as an oxide layer.
If painting is done without removing this oxide layer and impurities, contaminants can mix between the paint and the substrate, leading to poor adhesion. Additionally, the functionality of the paint may not be realized due to the influence of impurities, preventing it from exhibiting its intended performance.
However, by using blasting to prepare the substrate, the surface oxide layer, rust, and other contaminants can be completely removed. Furthermore, using angular abrasives creates countless fine irregularities on the substrate, increasing the surface area for paint adhesion and preventing peeling.
By cleaning and preparing the substrate with blasting before painting, the lifespan of the paint film can be extended two to three times, providing long-term economic benefits.
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