Paints and varnishes / | How to paint the metal? |
More recently, the idea of painted metal surfaces using waterborne paints seemed utopian. The most common of Metal - iron rapidly oxidizes in the presence of water, and then water-dispersion paint. Conventional water-dispersion paints, of course, are not suitable for this purpose. In this case, the need specialized materials to form a dense protective coating having corrosion resistance and have good adhesion to metal. All these scientists were able to solve the problem at once.
Now in Europe, it came down to the fact that the water-dispersion paints began to use in difficult areas such as automotive and shipbuilding. We have let's not get so far, and consider the possibility of painted metal in construction. Let's start with the most difficult - the roof.
Metal roofs can be divided into three groups according to the materials used:
- The first - from black iron.
- The second - galvanized iron.
- Third - ferrous metals: aluminum alloys, copper, etc.
The third group is extremely rare because of the high cost, so it is not necessary to be considered. The first and second - much more accessible and common, although much more expensive slate. With black iron everything is clear, it must necessarily paint. Usually for these purposes in the old used oil and alkyd paints. Those who love to paint often, can do so in the future. For the " lazy " it may be advisable acrylic water dispersion enamel roof with anti-corrosion effect. Such coverage will cost you a little more expensive than oil or alkyd paint, but last much longer. In addition to being more durable acrylic coating under atmospheric conditions, it still has a high and constant elasticity of aging. In the case of metals it is very important, because They have large linear expansion due to temperature fluctuations. In oil and alkyd paints elasticity less than that of acrylic, but they also lose its aging. As a result, at a certain moment, this type of ink just begins to flake off from the metal surface.
Paint galvanized roof - operation ambiguous. The zinc layer protects the iron well for 10-15 years. Here at the end of this period, it is necessary to paint. However, a new and better paint galvanized roof. It will prolong its life and give a more pleasant appearance. In galvanized iron more passive surface than the black. Therefore, in this case it requires a specialized material with greater adhesion and flexibility than the embodiment with black iron. Oil and alkyd paints generally are not suitable for this task. On the galvanized roof they will last no more than one season, and specialized acrylic enamel will delight you for years to come.
If a sheet of iron progofrirovat a certain way, and then paint acrylic enamel corrosion, you will get an analogue of metal, but several times cheaper. One company has already benefited from our advice and successfully sells painted galvanized gofrolist, creating competition to foreign analogues. To tell the truth, creating a water-dispersion paints for metals, we did not expect how much would be wide range of applications possible. For example, they were simply not interchangeable with the color of various explosive and flammable objects. All solvent-based paints are well lit, and their vapors are explosive and more. When use of an ordinary object - is not so bad, but if gas storage or storage facility, there is no place for jokes. The slightest spark, not to mention the butt, and with a team of painters can be forgiven, for that matter, and with the object.
Water-dispersed materials are completely safe vetom respect. There is a successful experience of painting a variety of metal structures and facilities: hangars, garages, fences, gates, even trucks and rail cars. A small amount of rust is not a problem. Anti-corrosion additives not only passivate its further spread, and transform the already formed. If the surface of the metal has a strong e rust damage, we can apply a special anti-corrosion acrylic primer with a converter rust, and then produce a painting. And all this quickly, odorless and with maximum comfort at work. So when you need to paint the metal surface, not in a hurry to wear a gas mask or cotton-gauze bandage, when working with acrylic water-dispersion materials you do not use.