Cold tide hit, water-like paint construction must pay attention to the matter!

Introduction:
, a chinese New Year's cold wave is brewing, ready to go. It is expected that from December 28 to 31, this cold wave will sweep across most of Our country from north to south, bringing "frozen" cooling and mixed rain and snow, which will be the strongest cold wave to affect our country this winter. By then, temperatures in 25 provincial capitals will be at their lowest level this winter, and the central and eastern regions will be facing their coldest New Year's Day

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winter has come for the north and inland urban areas, but the lower latitude of Guangdong is still a higher temperature, for water-like paint construction, temperature and humidity are very suitable. And the temperature in the north dropped sharply, the temperature is often below 0 degrees C, the preservation and construction of water-like paint has increased a lot of difficulty.
recently, when the editor turned over the reader's message, he saw one of the messages consulting the construction of water-like paint in winter. It is well known that the freezing temperature of water is 0 degrees C. The "glue temperature" of the coating is 5 degrees C. Therefore, the applicable temperature of water-type paint is set at more than 5 degrees C. In other words, changes in the low temperature environment will have many effects on the construction of water-like paint.
should we pay attention to in the construction of water-like paint in winter?
environmental requirements
1, water-quality primer spraying should be carried out as soon as possible after sand blasting rust removal, generally should not exceed 4h.
2, ordinary formula products construction, steel surface temperature and ambient temperature should generally not be lower than 5 degrees C, the temperature of the substrate to be coated should be at least 3-5 degrees C above the dew point;
3, winter formula product construction, steel surface temperature and ambient temperature should generally not be lower than 0 degrees C, the substrate temperature to be coated should be at least higher than the dew point 3-5 degrees C or more;
4, paint film drying process to ensure that the ambient humidity is less than 85%, and good ventilation. Low temperature, high humidity will cause the paint film drying time is slow, in winter as far as possible between 10 to 15 o'clock construction, to ensure that the paint film has a long enough time to dry; At the same time in the paint film drying process can not be caught in the rain, invisible dew.
Methods to raise the temperature of the construction environment:
electric heating method: winter poured concrete using electrical energy heating maintenance, including electrode heating, electric blanket, frequency vortex, coil sensing and infrared heating method. Water-based paint construction can learn from these methods, the simplest is the use of iodine tungsten lamp irradiation, improve the surface temperature of the coating, generally can be increased to 50-70 degrees C.
Set up warm sheds: This is to borrow from agricultural arguments, warm sheds are indoors do not heat the greenhouse, even in the coldest seasons, but also rely on the sun to maintain a certain indoor temperature level to meet the needs of vegetable crop growth. We can also build similar temporary heating sheds in the construction of water-based paint, the large construction environment divided into one or several small spaces, each space can be placed according to the actual situation of small heating devices, such as electric stoves, electric heating and so on.
about the winter coating summary - only the construction environment is controlled, the coating process is reasonable, in order to do a good job of water-based paint winter coating!
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