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NEWS
PRESS
05/10/2023

How to avoid bubbles and porosity to a cast metal surface

Powder coating is a technique that provides an extremely durable coating. However, defects such as bubbles, pinholes, craters, or porosity can occur and, in addition to spoiling the coating’s aesthetic appearance, they can compromise its functionality, quality and durability over time. There are several reasons for these defects, but they can be avoided with a few tricks.

Substrate preparation

It is essential that the substrate is clean, dry and free of any contaminants before applying powder coating. This is especially true for exhaling substrates, such as steel castings, galvanized steel, aluminum and its alloys, as these metals can release entrapped gasses during curing. To achieve a clean and smooth surface that facilitates the coating film’s adhesion, removing all traces of oil, grease, rust, or other residues from the substrate is necessary.

Environmental conditions

Environmental conditions also affect the result of powder coating. If the environment where the application is done is too hot or too moist, this can create adverse conditions for the application.

The best conditions for application are a maximum temperature of 35°C and Humidity between 20-70 %.

Powder coating selection

Once the substrate has been prepared, the selection of a suitable powder coating becomes critical.

To achieve the best results on this type of substrate, it is important to use a quality powder coating that promotes outgassing and allows the entrapped gasses in the substrate to escape.

RIPOL’s OGF Series consists of powder coatings based on polyester resins (topcoat, single coat) and epoxy or epoxy-polyester (primer), formulated with enhanced outgassing characteristics for applications on exhalant substrates. These coatings are designed to mitigate the expulsion of gas during the powder coating curing process, preventing the generation of bubbles and promoting an optimal aesthetic result.

The OGF polyester series also offers excellent weathering, UV and good chemical resistance.

Coating Application

Finally, to achieve good coating distribution and adhesion, air pressure, electrostatic tension, distance and spray angle must be carefully adjusted, remembering to apply the coating in thin, even layers.

By carefully following all these steps, the powder coating will result in a smooth, homogeneous, defect-free and durable finish capable of meeting aesthetic and functional customer needs.

We encourage you to contact us for any questions or concerns about powder coating.

PRESS
04/04/2024

RIPOL 22LN1G61092: The Perfect Combination of Conductivity and Adhesion

Have you experienced Topcoat adhesion problems after using a powder coating primer? Are you looking for a product that provides excellent corrosion protection? RIPOL 22LN1G61092 is the ideal solution! This new primer belongs to the CONDUCTIVE Series based on pure epoxy-based powder coating developed to minimize electrostatic discharge (ESD) and create an active barrier effect for superior anticorrosion power.

08/03/2024

Poor coating adhesion? Discover the winning strategy for a flawless and durable coating

Coating surfaces is a process that requires precision and attention to detail. Each element can affect the aesthetics and durability of the finished product. How can we avoid or solve this problem without compromising quality? Discover the winning strategy for a flawless and durable coating.

05/02/2024

Innovation and Sustainability at the 18th Wagner-Service Symposium

RIPOL, The Powder Coatings Company, is proud to announce its participation in the 18th Wagner-Service Symposium, the most important event in Poland and one of the most relevant in Europe for the powder and liquid coatings sector. The Symposium will take place in Warsaw from 21st to 23rd February 2024 and will bring together the main suppliers of equipment, components, coatings and other elements of the complex coatings sector.

19/01/2024

RIPOL: quality of powder coatings for architecture guaranteed by QUALICOAT

RIPOL, the Italian company producing high-quality powder coatings, has received, again for 2024, the prestigious QUALICOAT certification for its product series dedicated to the world of architecture. The 52L, 55R, 56L, 58L and 59L series have been submitted to the severe laboratory tests required by the European organization QUALICOAT, confirming their quality and reliability.