Liquid epoxy resin coating anti-corrosion steel pipe

Introduction to anti-corrosion steel pipes with liquid epoxy resin coating

Definition and Composition

Liquid epoxy resin coating anti-corrosion steel pipe is a type of steel pipe, and its surface coating is a two-component, high solid coating mainly composed of epoxy resin. Component A is composed of epoxy resin, pigments, additives, and auxiliaries, while component B is a curing agent formulated with modified amines, divided into primer and topcoat.

characteristic

Corrosion resistant and durable

It can effectively prevent the erosion of corrosive media such as acid, alkali, salt, etc. After multiple anti-corrosion treatments, the surface is smooth and uniform, without obvious defects. The anti-corrosion layer is firmly bonded to the steel pipe, providing reliable anti-corrosion protection.

The cured paint film is tough, water-resistant, non-toxic, non polluting to water, and has excellent durability. It can be used for a long time in harsh industrial environments without being easily damaged. For example, in transportation pipeline systems in industries such as petroleum and chemical, they can resist the erosion of various corrosive media.

Strong adhesion

There is good adhesion between paint films, and the stability and integrity of anti-corrosion coatings.

Good mechanical performance

It has good mechanical strength, tough paint film, wear resistance and impact resistance, smooth and wear-resistant outer surface, and can effectively reduce friction loss of pipelines.

energy conservation and environmental protection

The liquid epoxy resin coating anti-corrosion steel pipe coated with epoxy water inside and outside is a product that combines steel and plastic. The coated steel pipe has high strength, good rigidity, and strong pressure resistance. Due to the plastic coating on the inner wall, the inner surface is smooth, which can reduce fluid resistance, increase flow rate, and prevent scaling and the growth of microorganisms. It can fully achieve the purpose of energy conservation and environmental protection in terms of flow rate and usage effect.

application area 

Water supply related fields

Widely applicable for inner wall coating of water supply equipment such as drinking water tanks, water pipelines, water tanks, and water towers, as well as for use in cargo holds for sugar and grains. It can also be used as an inner wall coating for swimming pools and cooling towers in power plants.

energy sector

In the oil and gas industry, the corrosion resistance of oil and gas pipelines can effectively extend their service life and reduce maintenance and replacement costs.

The inner wall coating of metal and concrete that can be used to install fuel oil and gasoline is also applied in the internal protection of various finished oil tanks, oil pipelines, etc.

Chemical industry field

Suitable for anti-corrosion protection of chemical equipment and pipelines, it can effectively prevent corrosion and leakage of chemical substances, ensuring the safety and reliability of production equipment.

Construction field

Can be used as anti-corrosion coating for buildings and bridges to improve the durability and stability of structures; It can also be used for anti-corrosion protection of tap water pipelines and heating pipelines, reducing the risk of pipeline blockage and leakage, and ensuring the normal operation of water sources and heating equipment.

Construction and storage requirements

Construction requirements

Surface treatment: Before painting, the surface dust, oil, oxide scale, etc. of the object must be cleaned up to Sa2.5 level to ensure the quality of the painting. It is strictly prohibited to bring in water during construction. For different steel surfaces, different primers are recommended. For example, epoxy zinc rich primer is recommended for steel structures that have undergone sandblasting treatment; For ordinary rust removed steel structures, it is recommended to use epoxy red lead anti rust primer; Galvanized steel structures and stainless steel are recommended to use epoxy zinc yellow primer.

Paint mixing: The construction mixing method is to open the large mouth of component A, add component B into component A, and mix thoroughly. Slowly add the curing agent into the main paint according to the weight ratio of the paint and curing agent, stir evenly, and let it stand for 10-20 minutes. The maturation time and shelf life shorten with the increase of temperature.

Usage time: This material is required to be used as needed, and the formulated coating must be used up within eight hours. Unfinished materials should be sealed and stored. Construction should be stopped on rainy days or when the relative humidity exceeds 75%. For areas with severe corrosive media, it is recommended to apply multiple coats of paint.

Storage requirements

The product should be stored in a cool and dry place, protected from direct sunlight, isolated from sources of fire, and kept away from heat sources.

Production method (taking internal and external coated epoxy resin composite pipe as an example)

Pre treatment: Pre treat the base pipe (galvanized steel pipe) and polish it. The advantage is that it can make the coating on the inner and outer walls of the substrate uniform and have good leveling properties, meeting the CJ/T120-2008 standard and GB/T513520-2010 standard.

Preheating: Place the polished steel pipe into an electric oven for preheating. When the temperature reaches 230-250 ° C, it is usually preheated for about an hour and a half.

Coating: Coating the preheated pipes.

Curing: After coating, put it into a curing box for curing, and hold it for 15 minutes when the temperature reaches 200 degrees; Alternatively, after spraying, the heating equipment can be preheated to 180 degrees to cure the sprayed substrate. After 30 minutes of preheating and curing, the curing agent inside the epoxy resin can be completely cured, making the coating adhesion on the inner and outer walls stronger.