Types of Industrial Paint Coatings
Epoxy-Asphalt/Coal Tar Paint
Consisting of a mixture of epoxy and asphalt or coal tar, these paints offer excellent water resistance and good adhesion to steel and cement. They maintain adhesion over a long period of exposure and have excellent chemical resistance to acids, alkalis, and salts. They have the ability to achieve high film build in a few layers. However, they have limited resistance to weathering and are only available in dark colors.
Commonly used on steel and cement surfaces where good chemical resistance and moisture resistance are required.
Vinyl Resin Paint
Vinyl resin paints do not require oxygen, nor any catalyst or additive to dry the film. Their main advantages are that they dry quickly, are stable, and have good flexibility and abrasion resistance. Vinyl paints have the highest chemical resistance of all types of coating, their permeability is extremely low, and they can be used for immersion in water.
They are usually used in areas where good chemical resistance is required.
Acrylic Paint
Acrylic paints are thermoplastic polymers that are resistant to oxidation and can achieve decorative effects in relief without the risk of cracking. They are easy to use and offer great performance in strong chemical environments, are waterproof, and extremely flexible. They have good resistance to rubbing. They are used both outdoors and indoors and have good resistance to atmospheric agents.
Zinc Silicate Paint
These paints have in common the fact that the pigment provides cathodic protection to the steel substrate. They offer excellent weather resistance, both in humid tropics and in dry and cold climates. However, they should be applied on perfectly clean steel surfaces, as any organic pollutants prevent adhesion.
They are usually used as protective steel primers. With the subsequent application of an epoxy resin coating, the anticorrosive system is excellent, perhaps the best.
Nitrocellulose Paint
Their main binder is cellulose nitrate, plasticized for flexibility. Solvents used are fast evaporating and have a characteristic odor. Their main advantages are the formation of hard and abrasion-resistant films, good resistance to weathering, and they dry quickly.
They are used to varnish wood in general when they are colorless and on metal surfaces or furniture when they are colored.
Hammered Paint
Typically finished with aluminum particles or silicone, these paints have a finish similar to an area hit by a ball-peen hammer. They offer good resistance to wear, conceal defects in the substrate, and dry fast.
They are usually used on metal surfaces, both indoors and outdoors.
Aluminum Paint
Aluminum paints offer excellent resistance to weathering. When using a phenolic binder, they are highly resistant to marine atmospheres and resist high temperatures.
They are usually used on steel surfaces and as external antioxidant primers, preferably in storage tanks of flammable liquids.
Fire Retardant Paint
A coating whose specific mission is to retard the destructive action of fire by reacting in the presence of flames, forming a multicellular insulating layer. There are three types of fire retardant paints:
- Intumescent: Swell and foam upon contact with flame.
- Contact: Emit fire-extinguishing gases.
- Mixed: Combine foaming and gas emission.
Some fire retardant paints may experience premature aging from light exposure. Minimum requirements typically include: adhesion, ease of application by ordinary means, quick drying, moisture resistance, and weatherability.
Their application is suitable for protecting metal structures from fire damage.