What are the precautions for autumn and winter coating construction?

With most parts of the country began to enter the autumn and winter festival, many areas in the north recently floated a small snowflake, we have opened the "autumn pants" mode ahead of time. If you want to catch the small tail of 2017 coating, small editor or remind everyone must do a good job of paint "warm" work Oh. Small editor organized the winter paint construction precautions Oh, let's see it!
with the arrival of cold air, the weather is getting colder and colder
the
. Cold winter, low temperatures, in the paint construction process, need to pay attention to avoid a series of adverse factors brought about by winter:
one. Substrate treatment
1, wood: the selection of low water content of the plate, the general plate moisture content should be less than 12%, as far as possible below 10%. Buy a good plate to protect, do not be caused by moisture moisture rate rise, good conditions before the construction to do drying treatment, to avoid decoration because of the plate moisture problems leading to whitening, cracking and other phenomena.
2, steel: after rust removal to dust, and then wipe the substrate with cotton diluent, due to the low temperature outside the winter, outdoor construction in winter general not in the morning, the general construction time should be after 10 a.m., after handling the clean substrate, should be sprayed immediately rust-proof paint, so as not to cause the substrate rust again.
two. Use of tools
if the use of air compressor in winter, it is also necessary to install oil and water separator, in order to prevent the compressor oil and water on the paint film adverse effects, the use of the process as far as possible every day to the compressor inside the oil and water release, to prevent mixing into the paint, resulting in bubbles on the surface of the paint film.
wednesday. Proper use of thinners
in the winter paint construction process, should pay attention to the difference between winter products and summer products. Due to differences in winter and summer temperatures, the selection of thinners is very important, for example, in summer, paint thinners are adjusted to be slower and drier, and in winter, paint thinners are adjusted slightly faster to dry. Therefore, summer thinner products should not be used in winter, otherwise, because of slow drying and bring bite primer and other paint film ills.
Thursday. Construction environment
in winter, the temperature is low, at this time, it is not appropriate to work at low temperature, because in the winter low temperature situation, the performance of chemical materials will change, and coatings are composed of a variety of chemical materials, so in the winter coating construction process, we need to pay attention to avoid a series of adverse factors brought about by winter.
1, winter paint construction, outdoor construction temperature can not be less than 5 degrees C, humidity can not be greater than 85%. Therefore, outdoor construction in winter generally do not take place in the morning, (because the surface of the work piece in the morning there is water or ice fog, sprayed with paint is easy to cause paint film off). The general construction time should be after 10 a.m. In addition, winter rain and snow outdoor is not easy to carry out paint construction indoor construction temperature is generally not less than 10 degrees C, in order to ensure the volatile harmful gases and paint drying, to open the window ventilation after construction.
2, prohibit each layer of coating film in poor drying, not normal grinding when the construction, otherwise easy to cause bite bottom, shedding and other phenomena.
3, low winter temperature, paint table dry time is long, paint film surface and external air contact time is relatively long, air dust particles easily adhere to the paint film surface, the formation of particle phenomenon (air drying is more obvious). Therefore, in order to better paint film effect, before coating construction, pay attention to the clean environment.
4, strictly prohibited one-time thick coating, otherwise it will cause bite bottom, whitening, cracking, pinholes, bubbles and other paint film ills.
5, after tuning the paint placement time should not be too long, the longer the time, the more gloss will drop, with the best tune.
6, the temperature of the coating varies with the ambient temperature, when the temperature is lower, the viscosity will increase a lot, which will lead to an increase in the amount of thinner, at this time the gloss of the coating, fullness will be reduced. Winter construction due to low temperature, to receive good construction results, it is best to work, paint temperature, the environment adjusted to about 20 degrees Celsius. Otherwise, it is difficult to achieve the ideal paint film.
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