Steel structure gathering tips for construction

The polyganic material has significant advantages such as its excellent anticorrosive performance, excellent wear resistance and impact characteristics, as well as continuous and seamless, strong adhesion, fast construction, and fast solidification. It can effectively ensure the long -term stability of the steel structure Operation provides reliable technical support for engineering applications in related fields.

In terms of application fields, pool coatings play a vital role in anti -corrosion projects such as chemical storage tanks, pipelines, and cross -sea bridges to provide reliable guarantees for building waterproof projects. Structural applications also show excellent performance, effectively provide protection, and extend the service life.

Steel structure spraying polychen construction process
Substrate processing

Sand spraying/shot blasting is performed so that the surface reaches the SA2.5 level. For residues such as oil pollution, salt, solvents, etc., it is necessary to clean up to ensure durability. Increase the thickness of the contact area to ensure the thickness of the coating. The treatment of the corner is recommended at the corner of the corner to transition to a smooth transition to reduce the stress concentration of this site.

Brushed polyurethane primer

Spraying on the base layer of the steel structure can increase the adhesion of the polyurethane coating to the base layer. It is recommended to spray to form a dot-like film-forming distribution.Primer curing standard: The construction of polyurethane spraying can be carried out without material and without obvious liquid by sticking hands.

Spray

Take the order of up, then down, and then bottom, and the small area of ​​cross -crossing movement is sprayed. The movement speed is performed at the thickness of 0.35 to 0.50mm per layer. The width of each spray should be less than 1200mm. It is greater than 120mm. While spraying, it is necessary to clean up the pollutants under the feet and the pipelines at any time to avoid the quality of the garbage from failing to meet the standard.

Applying the puppet paint paint (beautiful weather, not necessary)

Use a special spraying tool to spray the polycard surface coating material evenly to minimize the construction binding seams. The coating should be painted within the prescribed time, and the connection of the front and rear materials should be taken. The impurities should be cleared immediately during the construction.

During construction and maintenance time, the control staff enter and exit. If the temperature at the construction time is 10 to 25 degrees, the maintenance time is 24 to 48 hours. The adhesion can be performed after 7 days after the construction of the polycase coating. Places with heavy load demand need to be maintained for more than 7-10 days, and its performance has reached the best.

Precautions for the construction of steel structure spraying polyurethane

 

01 construction environment

① The recommended range of the construction environment is 3 ° C -38 ° C.

② Wind power ≤ level 3

③ The environmental humidity is ≤80%. The grassroots and unskilled ground must be 3 ° C higher than the dew point temperature to prevent the dew in the construction process.

 

02 Steel structure pre -processing

① The surface of the pre -processing steel structure can be treated with sandblast blasting and other methods to ensure oil -free, rust and dust.

② Practice or repair the unclear part to ensure that the coating is uniform.

03 Paint paint
① Construction method: The short-haired roller or spray gun is evenly coated. It should not be too thick. The recommended dosage is 0.05-0.12kg/㎡.
② Qualified construction standards: The bottom material has no large area of ​​exposure; the construction is the next step when the film has been made, and the construction is re -applied for too long.
③ The curing time is 1-8 hours, the higher the temperature, the faster the fixed.

04 Spraying pool layer construction
①Capya should be performed within 2-8 hours after the construction of the bottom paint.
②. ② Roll the packaging bucket for 3-5 minutes before use, which can make the material distribution in the barrel more uniform. ③M material (blue barrel) Before construction, you need to insert the mixer and stir evenly for 5 minutes and keep the stirring state during use.
④ Construction in strict accordance with the proportion of 1: 1, the imbalance of the proportion will cause the polychen performance to be severely reduced or lost.
⑤ Control the thickness of the coating coating, and check the regular inspection to ensure the design requirements.
⑥ Monitor the quality of coating to avoid problems such as foaming and peeling.

05 face paint paint
① The construction of the surface paint should be carried out within 2-24 hours completed by the condensation of the agglomeration. After more than 48 hours, the interface agent needs to be applied.
② Construction method: Use a short -haired roller to cross the cross evenly/spray gun evenly, and should not be too thick.

06 Construction Safety and Protection
① Safety education and training of construction personnel to ensure safety measures and coating performance.
② Smoking and fire sources are prohibited on the spot to maintain good ventilation.
③ Construction workers should wear protective supplies to avoid touches of coatings to contact the skin and eyes.

07 Precautions after construction
① The performance gradually reached the optimal performance within one week after the pool is sprayed. It is recommended that the performance test and other performance tests are recommended after at least 72 hours, and it is appropriately extended at low temperature.
② It is forbidden to wash with strong oxidized substances.