Construction environmental conditions 1, temperature: generally controlled at 0 ~ 35℃; 2. Humidity: generally controlled at no more than 80% (atmospheric humidity); 3. Outdoor construction is prohibited under the conditions of rain, fog, high air humidity and sandstorm; 4. In case of rain and fog during field operation and open-air construction, the coated steel structures shall be covered with ponchos before coming off work.
The coating is 1, and the primer is mixed according to the ratio of A: B = 6: 1; 2. After the primer is fully stirred evenly, it can be cured at 23 2℃ for 20~30 minutes before construction. Generally, the cured coating is used up within 3~4 hours, and the remaining materials that are not used up in time and have become thicker shall not be diluted before use; 3. When applying the second primer, the coating interval shall be at least 6 hours and at most 2 weeks; 4. Only after the primer is dried (12~24 hours) can the matching construction topcoat be painted; 5. The topcoat shall be prepared according to the ratio of A: B = 5: 1, and the construction can be started after it is evenly prepared. 6, whether primer or topcoat in the deployment of paint, the proportion and measurement must be accurate; 7. When the number of topcoats increases, the painting interval shall be at least 2 hours and at most 48 hours; 8, after the completion of the construction, must stay for 48 hours, can be put into use.
Construction method and quantity of brushing, roller coating or spraying. If the coating is too thick in the construction process, 0~6% special thinner can be used appropriately, and it is not advisable to overdo it. Generally, the coating is divided into one bottom and two sides or two bottom and two sides.
Precautions for construction and storage of anticorrosive coatings: 1. Prepare the coating in strict accordance with the weight proportion of the product description, and carry out construction and maintenance.
2, paint should be stored in a dry, ventilated, cool place, it is forbidden to rain exposure, and close to the fire; Transportation shall comply with the safety regulations for flammable transportation.
3. In order to ensure the quality of the coating, in case of wind, sand, rain, snow and fog, the open-air construction of the coating should be stopped.
4. When the ambient temperature is lower than-10℃ and higher than 40℃ or the relative humidity is higher than 80%, it is not suitable for construction.
5. Before painting, after the previous layer is completed, the next layer should be painted. If the paint film is completely cured, it should be roughened before brushing the next layer.
6. The coating equipment shall be delivered after the anticorrosive coating is completely cured (usually 5-7 days in summer, 7- 10 days in winter, solvent-free coating system 10- 15 days), and the uncured coating shall be rain-proof.
7. During winter construction, each layer of paint should be thoroughly dried, and the time for recoating between layers is longer than that for summer construction.
8, winter construction should try to avoid the evening or night, low temperature construction will cause pulverization, cracking, warping, peeling and other ills.