Coating process: coating construction of anticorrosive coating

Key tips: 1 Construction conditions of anticorrosive coating (1) The construction environment shall be well ventilated, clean and dry, the indoor construction environment temperature shall be above 0 ℃, the outdoor construction environment temperature shall be 5-38 ℃, and the relative humidity shall not be greater than 85% It is not suitable to operate in rainy days or when the steel structure surface is dewed Winter should be carried out under heating conditions, and the room temperature must be kept balanced (2) The fabrication or installation of steel structure is completed, calibrated and accepted (3) Pay attention to coordination with civil engineering, especially with decoration and coating engineering Which is the price of Dajin diatom mud Recommended brief introduction: which is the price of Dajin diatom mud? How to buy genuine diatom mud? Guangdong diatom mud agent suggests placing a basin of cold water in the air conditioning room, so that the diatom mud wall can breathe effectively The feature of the breathing wall is obvious When the indoor air is dry, the diatom mud wall will release the absorbed water quickly Put it out to help regulate the indoor dry humidity It is suggested to place a basin of cold water in the air conditioning room, so that the wall of diatom mud can breathe effectively The feature of the wall that can breathe is obvious When the indoor air is relatively dry, the wall of diatom mud will absorb the water Coating home news: 1 Construction conditions of anticorrosive coating (1) the construction environment shall be well ventilated, clean and dry, the indoor construction environment temperature shall be above 0 ℃, the outdoor construction environment temperature shall be 5-38 ℃, and the relative humidity shall not be greater than 85% It is not suitable to operate in rainy days or when the steel structure surface is dewed Winter should be carried out under heating conditions, and the room temperature must be kept balanced (2) The fabrication or installation of steel structure is completed, calibrated and accepted (3) Pay attention to the coordination with civil engineering, especially with decoration and coating engineering, and prepare Cross plans and measures 2 After coating pretreatment coating is selected, the following operation procedures are usually carried out before coating (1) Open the barrel Before opening the barrel, the dust and sundries outside the barrel shall be removed to avoid mixing into the paint barrel At the same time, the name, model and color of the coating shall be checked to see whether they are in conformity with the design regulations or selection requirements In case of skinning, take out all the paint to avoid affecting the coating quality (2) Stir The paint and sediment in the barrel can be used only after they are stirred evenly (3) Ratio The two-component coating must be mixed in strict accordance with the proportion specified in the instructions before use Once the mixture is mixed, it must be used up within the specified time (4) Ripening After the two-component coating is mixed and stirred evenly, it needs a certain curing time to use, so as to ensure the performance of the film (5) Dilution Due to the influence of different conditions such as storage conditions, construction methods, working environment and temperature, some coatings sometimes need to use diluent to adjust viscosity (6) Filtering Generally, 80-120 mesh metal screen or nylon wire screen is used for filtration, and the purpose of quality control has been achieved 3 Brush antirust paint (1) the primer shall be applied after the metal structure surface is cleaned, otherwise the metal surface will be oxidized and rusted again The painting method is to spread oil (open oil) on the top and bottom of the oil brush, evenly brush the oil horizontally and vertically, and then level the brush trace (2) The antirust paint required by the design can be applied to the metal structure once If the antirust paint has been painted before, check whether there is any damage and rust spot, remove the original rust paint layer, polish it thoroughly with wire brush and gauze, and then brush the antirust paint again (3) When the oil base paint or epoxy primer is used, it shall be evenly applied on the metal surface During construction, adjust the primer and viscosity to 18-22st for spraying and 30-50st for brushing (4) The primer is mostly dried naturally When using epoxy primer, it can also be baked The quality is better than that of natural drying 4 Local puttying (1) after the antirust primer dries completely, the sand holes, missing edges, pits and other places of the metal shall be plastered with gypsum putty (2) Oil putty and fast putty can be used It can also be mixed with iron red alkyd primer (50%) and varnish (50%), and added with appropriate amount of gypsum powder and water to form putty for priming (3) Generally, the first layer of putty is thick, so when mixing, the oil content shall be reduced one by one, and the gypsum powder amount shall be increased, which can be hung once, without needing to be smooth The second putty needs to be smooth and smooth, so the oil content can be increased when mixing, and the putty can be adjusted to be thinner (4) When applying putty, first fill the local depression with rubber scraper or steel scraper After the putty is dry, it shall be sanded and the dust on the surface shall be removed, then a layer of primer shall be applied, and then a layer of putty shall be applied The number of layers of putty shall be determined according to the different conditions of metal structure Generally, the metal structure surface can be scratched for 2-3 times (5) Sanding shall be carried out after one layer of putty is not dried If the first layer of putty is rough, it can be sanded with coarse iron sand cloth and wood block; the second layer of putty can be sanded with fine iron sand or 240 water sand paper; the last two layers of putty can be sanded carefully with 400 water sand paper 5 The brushing operation must be carried out according to the design and specified number of layers The main purpose of coating layer number is to protect the surface of metal structure for durability, so it is necessary to ensure the coating layer and thickness, so as to eliminate the pores in the layer, resist external erosion, and achieve the purpose of corrosion prevention and maintenance 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,