Protecting metal and concrete structures from corrosion and aggressive environments is an important task in modern construction and manufacturing processes. Two popular methods of anti-corrosion coating are polyurethane foam coating and the use of high molecular weight polyethylene and thermoplastic paints. In this article we will consider their features, advantages and disadvantages.Application technology
Polyurethane foam coating
Polyurethane foam coating is applied using spray methods, which involve mixing the components just before application. Once activated, a chemical reaction causes the material to expand, forming a strong and flexible layer.
Pros:
- Fast application. The process takes a relatively short time, which is important for reducing equipment downtime.
- Thermal Insulation. Polyurethane foam has excellent thermal insulation properties.
Minuses:
- UV sensitivity. Over time can lose properties under the influence of sunlight, which requires covering with protective layers.
- Need for substrate preparation. The surface must be thoroughly prepared to achieve adhesion.
High molecular weight polyethylene
and thermoplastic paints
High molecular weight polyethylene and thermoplastic paints are applied using the ANTICOR POLY portable gas flame application unit or other specialized spray equipment. These materials provide a durable and flexible coating that is resistant to aggressive chemicals and mechanical damage.
Pros:
- Resistance to chemicals. Provides reliable protection against acids, alkalis and other aggressive agents.
- Durability. The service life of such coatings can reach decades with proper application.
Minuses:
- Pre-impregnation with a high-temperature primer is required when applying the coating to concrete.
Economic aspects
Cost of materials
Comparing the cost of materials for polyurethane foam coating and high molecular weight polyethylene with thermoplastic paints shows that both options have their own characteristics. Polyurethane foam materials may be less costly at the purchase stage, but preparation and application may require additional funds.
Long-term costs
Despite the higher initial cost of high molecular weight polyethylene and thermoplastic paints, their durability can lead to lower maintenance and repair costs in the future.
Aesthetic qualities
- Coating Appearance. Polyurethane foam coating has a textured surface, which can be a disadvantage aesthetically. In contrast, high molecular weight polyethylene and thermoplastic paints are available in a variety of colors and can be adapted to different designs.
- Resistance to impact. The coating made of high molecular weight polyethylene and thermoplastic paints is more resistant to external factors (water, mechanical impact), which allows it to maintain its appearance for a long time.
Conclusion
Comparison of polyurethane foam coating and coating with high molecular weight polyethylene and thermoplastic paints demonstrates that each method has its pros and cons. Choosing the right coating depends on the specific application, operating conditions and budget. For those looking for a quick and effective solution, polyurethane foam may be a good choice. At the same time, if long-term protection and resistance to aggressive influences are required, it is worth considering the use of high molecular weight polyethylene and thermoplastic paints.