General knowledge of coating: requirements for construction environment of coating engineering

Core tip: the coating construction has the specified coating construction environment The ambient temperature for coating construction should be 10-30c, and the relative humidity should not be more than 85% When the surface temperature of the concrete base is close to the dew point, condensation and condensation are likely to occur, so satisfactory coating film cannot be formed During coating construction, the surface humidity of the base layer should be 2-3 ℃ higher than the dew point Air humidity has a greater impact on the coating Under high humidity, the water in the air is easy to condense on the surface of the film, and may enter the film, which will cause defects such as whitening of the film The influence of humidity on epoxy coating is small, and it will not affect the coating greatly; but for Polyurethane Application scope and advantages of roller ceramic coating Recommended introduction: the surface of ceramic rubber plate used for roller ceramic coating is cast into durable rubber plate by hundreds of independent small ceramic pieces Each ceramic piece has raised characteristics Under general conveyor belt pressure, thousands of unique cast bumps can produce positive traction, prevent slipping and extend the service life of conveyor belt roller At the same time, the bottom layer adopts high-quality rubber, which has strong elasticity and can play a good impact resistance role The scope of application of roller ceramic coating is one three six 83857180 (the same as V) 1 Roller coating in extremely harsh working environment 2 The belt joint is not suitable for fixing with iron buckle; 3 It is suitable for leather Coating home news: coating construction has a specified coating construction environment The ambient temperature for coating construction should be 10-30c, and the relative humidity should not be more than 85% When the surface temperature of the concrete base is close to the dew point, condensation and condensation are likely to occur, so satisfactory coating film cannot be formed During coating construction, the surface humidity of the base layer should be 2-3 ℃ higher than the dew point Air humidity has a greater impact on the coating Under high humidity, the water in the air is easy to condense on the surface of the film, and may enter the film, which will cause defects such as whitening of the film Humidity has little effect on epoxy coating, and will not have a great effect on the coating; however, for polyurethane coating, when the humidity is more than 80%, the moisture in the air will react with isocyanate in the coating to generate gas, which makes the coating bulge and bubble In the coating construction of some bridges, in order to catch up with the progress, some construction units constructed when the humidity was more than 80%, resulting in the coating bubbles and falling off, which seriously affected the project quality During the construction, the method of combining construction barometer with on-site temperature and humidity measurement and control is adopted (1) the construction barometer mainly records the weather forecast of the day, including weather, temperature, humidity and wind speed as reference (2) thermometer and hygrometer shall be used on the construction site, and the temperature and humidity on the site shall be checked by a specially assigned person before construction If they do not meet the requirements of coating construction, coating is not allowed Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,