Coating general knowledge: Construction Technology of high strength elastic polyurea waterproof coating

Core tip: substrate treatment 1、 Concrete base material 1 Before the surface treatment of concrete base material, the surface shall be firm, dense, flat and free of oil stain, and the base material shall be fully maintained to meet the quality index required by the design 2 The parts with needle holes and cracks on the surface shall be closed, and the dust and waste on the base material shall be removed in time 2、 Metal substrate (take steel substrate as an example) 1 The method of grinding and filling shall be adopted for the candle joint, welding slag, gouging scar, etc on the surface of the base material to make the whole base material smooth transition, and the sharp edge and acute angle shall be polished R ≥ 5mm arc 2 Sand blasting (shot blasting) for rust removal Sandblasting service Paint knowledge | precautions for wall paint color selection Recommended introduction: when painting the wall, the owner sometimes has difficulty in choosing what color of the wall paint to paint In fact, there is no ugly color in the wall paint, only the disharmonious color matching The use of wall color contains the knowledge of health Too strong color will stimulate people's perception, make people have a sense of fidgety, affect people's mental health Grasp the basic principles of wall color and paint a colorful space 1、 Wall paint color selection notice 1 Light color is generally used for the top surface Light colors make people feel light, dark colors make people feel heavy Usually, the treatment of rooms is from top to bottom, from shallow to deep For example, the ceiling and walls of rooms are white and Paint Home News: substrate treatment I, concrete substrate 1, concrete substrate before surface treatment, the surface shall be solid, dense, flat, and free of oil, and the substrate shall be fully maintained to meet the quality index required by the design 2 The parts with needle holes and cracks on the surface shall be closed, and the dust and waste on the base material shall be removed in time 2、 Metal base material (take steel base material as an example) 1 The method of grinding and filling shall be adopted for the candle seam, welding slag, gouging scar, etc on the surface of the base material to make the whole base material smooth transition, and the sharp edge and acute angle shall be polished R ≥ 5mm arc 2 Sand blasting (shot blasting) for rust removal The rust grade and derusting grade of steel surface before coating are reached by sand blasting, and they have certain roughness For the parts that cannot be sand blasted, carry out manual derusting Primer coating shall be used for primer coating, and primer coating (spraying, brushing or roller coating) shall be carried out according to the process recommended by the material manufacturer The function of the primer is to improve the adhesion between the polyurea coating and the substrate, and has a certain sealing effect Note: epoxy primer can also be used for metal substrate primer Polyurea spraying 1 Check the surface condition of the primer of the parts to be coated before spraying, and confirm that the surface has been cured, dry and clean before construction 2 Check the ambient temperature and humidity Construction can only be carried out when they meet the construction requirements Otherwise, construction is prohibited If construction is necessary for special reasons, corresponding reliable measures shall be taken to ensure the project quality 3 Thoroughly check the condition of all kinds of equipment before spraying, and confirm that the performance is in good condition Start the equipment and check the operation condition according to the equipment operation procedure Adjust the equipment and set the process parameters before coating 4 The thickness of spraying shall be approximately uniform In case of multiple spraying, horizontal and vertical cross spraying shall be carried out to ensure uniform coating thickness, and the coating thickness shall be checked at any time during construction 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,