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Winter is coming, with the temperature drop, the temperature difference between day and night becomes bigger, which has a great impact on the construction of paint. Non-drying, hanging and other ills are common problems in autumn and winter paint construction, which bothers many construction teams.
Have "environmental protection", "fashion" temperament, water-based paint once listed to become the darling of the paint industry, by the end-user favorite, but because of the "proud", "high cold" personality, water-based paint construction process often need a hundred care, a little careless will appear coating accident . Coupled with the coming of winter, the construction of water-like paint is facing a huge test.
below for the reporter to analyze and summarize the experience and lessons of water-based paint winter coating foundation, after a lot of detailed theoretical exploration and practical research, brought water-based paint winter painting "six-step" note analysis, to help you easily play winter coating.
step1: Substrate treatment - "three degrees"
cleanliness: oil removal and rust removal must be carried out before coating to reduce paint film defects (ideal rust removal grade: injection cleaning Sa21/2 grade) Roughness: smooth, dense surface to be coated Need to deal with the appropriate roughness substrate temperature: control at 10 to 50 degrees C is appropriate
Step2: water paint deployment - "good water"
can only use pure water or drink tap water can not use hard water, salt water, acid water Moldy water body can not add oily dilute material, otherwise there will be particles, shrink holes and other issues
Step3: construction viscosity - "high point good"
water-based industrial paint viscosity should be higher than the same type of oily products water-based paint atomization process thinner volatile than paint, if Low viscosity easy to produce flow hanging ideal construction viscosity range: 20 to 70s (4 cups) water-like paint is mostly non-Newtonian fluid (shearing and reducing viscosity), medium and high viscosity under easy atomization, convenient construction
Step4: coating equipment - " To be dedicated "
water-based paint coating can use oil spray gun, but before use to thoroughly clean the residual solvents and coatings in the spray gun all lines and metal parts in contact with water-based paint need to use stainless steel electrostitive spraying, water-based paint generally does not need to be adjusted, but spraying Equipment (spray gun, pump) need to be replaced with water-specific equipment
Step 5: coating matching - "look recommended"
metal white blank surface must be coated with primer or primer paint, can not directly construct paint water-like paint spray film thickness Should not be too high, otherwise easy to hang and affect the dryness recommended for each dry film thickness: finish is not greater than 40 sm, primer is not greater than 60 m recommended thin coating multiple channels can be used "oil base and water surface" matching, but large-scale coating before verification of adhesion is not recommended "Water bottom and oil surface", especially in a single component of water-like primer construction paint
Step6: coating drying - "controlling temperature and humidity"
increase temperature control, dehumidification equipment, to ensure that the coating environment temperature is not less than 10 degrees C, humidity is not higher than 75% If you can in the best construction window (temperature: 20 to 35 degrees C, humidity: 45 to 70%), the coating effect is better
after the above "six steps" careful care, water-based industrial paint "high-cool miss" seconds become "soft green cute", showing "fashion", "environmental protection" temperament at the same time, the coating effect also captured the hearts of more users.
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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