January 19, 2012

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Painting Metal Surface Painting of metal - work that requires experience and knowledge. Painting of metal structures is impossible without high-quality metal protection against corrosion. Painting a metal requires the following preparations: surface preparation, degreasing, priming and applying the enamel. In order to perform color of the metal, making a complete cleaning of the surface, it is necessary to achieve good adhesion of the enamel to the metal (ie, adhesion). When painting metal performed on older surfaces, it is necessary to monitor the absolute quality of these works, otherwise new coat of paint will not last. If moisture is possible internal corrosion, and when the temperature drops paint will flake off. Scraping metal, it is important to use an abrasive equipment. Next, paint the metal surfaces require degreasing, for traction, or enamel. External contamination is always present on the All items and structures, and their manifestations in severe soil or enamel will roll off the metal film or give a heterogeneous, which leads to the fact that metal coating will be carried out poorly. Painting of metal primer and asking for more, but the surface before this kind of work should be clean and dry, and it eliminates the long break between its preparation and painting. Primer for metal for painting metal is held in two or more layers (according to the instructions), waiting to dry between coats. Painting of metal structures and padding performed only on a flat, defect-free surface. This is followed by directly painted metal. The gate and the roof, all kinds of fences and elements of play and sports equipment, pipes, doors, radiators and boilers, garages and cornices - but you never know where another metal may find application. Plus much of this material: it is strong and durable, able to endure high temperature and "hold" kick. Minus one - the ability to corrode and collapse under the influence of oxygen What to protect? One of the most effective protection methods against atmospheric corrosion is to apply protective coatings.
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Cellulose Fibre Thermal We consider three types of modern insulation: mineral wool, expanded polystyrene and ecowool. If the mineral wool has long been used in construction in Russia, the polystyrene is a relatively new material, and ecowool and at all exotic. All three materials with the technology of production do not rot, have good insulating properties, are inexpensive and easy to use. Mineral wool are processing of molten rock or slag. In the resulting synthetic vitreous fibers are added binders. It has good heat and sound insulation properties; when wet, these quality of mineral wool are significantly reduced. This insulation is not flammable. The characteristics of mineral wool thermal conductivity, W / (m * K): 0,039-0,054 Group of combustibility: NY, G1, G2 Resistance to deformation: Average Water and biostability: low Destruction temperature, C 350 Density, kg / cu. m: 75-350 life, years: 20-30 Ecowool or cellulose wadding, as a rule, consists of 81% of the treated pulp at 12% - of preservative, and by 7% - of the flame retardants. In fibers of the material is lignin, which gives the sticky when wet. All components of this material are non-toxic, non-volatile, harmless to human natural ingredients. Cellulose insulation does not support combustion, not rot, has good heat and sound insulation. Ecowool capable of holding up to 20% humidity, which has almost no effect on the heat-insulating properties. Material easily gives moisture to the environment and when dry does not lose its properties. Characteristics of Cellulose Fibre Thermal conductivity, W / (m * K): 0,036-0,041 flammability Group: G1, G2 resistant strains: low Water and biological stability: the average temperature of the destruction, C 220 Density, kg / cu. m: 30-96 life, years: 30-50 Expanded polystyrene - the material class of plastics, characterized by cellular structure. Characterized by high water and biopersistence, low specific gravity. A characteristic feature of polystyrene - a low fire, so it usually used at temperatures above 150 C. Burning polystyrene is accompanied by a large amount of smoke and toxic substances. To prevent such effects in this type of insulation material in the...