Polyurea anti-corrosion construction technology

Spraying polyurea anti-corrosion elastomer technology and steel structure anti-corrosion coating play an important role in extending the service life of steel structures. Strengthening polyurea elastomer technology during the anti-corrosion construction process ensures the construction quality of anti-corrosion coatings.

On the basis of accumulated experience, polyurea anti-corrosion coatings have created polyurethane spraying equipment and polyurea spraying equipment suitable for modern production and construction technology. Polyurea anti-corrosion spraying equipment has high utilization rate, stronger power, high degree of self-control, accurate proportion, high pressure full mixing, good cleaning and spraying effect, high atomization degree, high surface flatness, long service life of accessories, and low maintenance cost.

Requirements for spraying polyurea on concrete foundations. Ensure that the moisture content of new concrete is less than 6%, and maintain a certain level of flatness without sanding. If there are honeycombs or caves on the foundation, it must be repaired with high-grade rapid setting cement. If there are sand running defects, sand consolidation agents must be used to consolidate the sand. The old concrete layer must be cleaned of surface attachments such as paint or other substances. If oil seeps into the ground, it is necessary to use a spray gun for thermal drying, and pay attention to the baking temperature to avoid damaging the concrete structure. After all surface cleaning work is completed, dry grind the concrete floor with a 300 concrete floor self vacuum grinder until the natural pores of the concrete are exposed. According to needs, coarse grinding and fine grinding can be selected, and a vacuum cleaner can be used to thoroughly remove dust. Polyurea anti-corrosion primer can be applied to fully wet and penetrate. Then scrape polyurea special putty on the dry primer, polish and vacuum it, and use it as a backup to create a clean, good, and flat concrete foundation surface for polyurea thermal spraying.

Polyurea anti-corrosion spraying construction process:

1. Cleaning the leveling layer: Before the polyurea anti-corrosion spraying construction, use cleaning tools to clean the leveling layer and thoroughly remove foreign objects such as cement dust and grease from the cement surface.

2. Special parts treatment: large cracks (5) mm or more, small cracks (5mm or less), waterproofing around pipes, drainage pipes, roof interlayer, protruding parts, etc.

3. Check the moisture content of the leveling layer: Elastomer needs to be sprayed on the dry leveling layer, and the adjusted cement floor should be naturally dried to a moisture content below 8%.

4. Primer coating: The concrete base surface adopts room temperature hardening single component permeable primer, which is applied by brushing, roller brushing, or spraying. The function of the primer is to cut off the upward penetration of water in the leveling layer, prevent the swelling and detachment of the polyurethane anti-corrosion spraying elastic layer, further strengthen the surface of the leveling layer, improve the bonding strength between the polyurethane anti-corrosion spraying elastic layer and the base layer, and prevent pinholes in the elastic body.

It does not contain catalyst and can be quickly solidified on any curved surface. Beveled and vertical surfaces are sprayed and formed without sagging. gel is used for 5 seconds and has a walking strength of 1 minute.

Polyurea anti-corrosion is not sensitive to moisture and temperature, and is not affected by environmental temperature or humidity during construction. Can be constructed on ice; Construction at -28 ℃; Can be cured in the freezer.

Solid content of 100%, free of any volatile organic compounds (VOCs), green and environmentally friendly.

Spraying or pouring can be carried out in a 1:1 volume ratio, with a thickness range of several hundred micrometers to a few centimeters per construction, overcoming the drawbacks of previous multiple constructions.

Polyurea anti-corrosion has excellent physical and chemical properties, such as tensile strength, elongation, flexibility, wear resistance, aging resistance, corrosion resistance, etc.

The polyurea anti-corrosion has good thermal stability, which can be used for a long time at ℃, and can withstand short-time thermal shock at 350 ℃.

Like ordinary coatings, various colors and dyes can be added to make products of different colors.

The formula system can be adjusted arbitrarily, with a feel ranging from soft rubber to hard elastomer. Good reproducibility, continuous coating, continuous, dense, seamless, pinhole free, aesthetically pleasing and practical.