How to choose paint for coatings
Choose a coating, depending on how the product will be used. If the pipes are designed for hot water supply( for example, heating or bathroom), then it is necessary to choose a material that can protect against rust when exposed to hot water. Seeing on the package labeling "hot water", you can safely take it from the store shelves. Anticorrosive paints are: pentaphthalic, organosilicon and alkyd. It is also possible to use water-dispersible, but only before it is carefully primed the surface to be painted. Oil paints should not be used because they quickly change their color.
- Alkyd paints. Pros: give a good coating, excellent tolerate high temperatures, resists mechanical influences and wear-resistant. The palette of colors of this paint is diverse. Cons: unpleasant smell even after drying.
- Water-dispersible. Pros: quickly dry out and do not have a pronounced smell. Cons: with time lose color and need updating.
- Acrylic. Pros: they give a glossy shine and come from organic components, they keep the original appearance for a long time. Cons: dry for a long time and have a persistent and sharp odor of acetone, other solvents.
For cold water pipes are painted with materials that can withstand condensate. They must adhere well to the metal and be applied without missing. It is necessary to clean the pipes from the old coating, otherwise the new layer will peel off. Even if everything looks normal, it is possible that the old layers are corroded and have already started to peel off.
There are many types of paints in shops. The most popular of them are PF-115, because they are inexpensive and durable. But also polyurethane, epoxy materials, which are more resistant to various influences, can be used.
You can also try a special enamel for rust, but it is much more expensive than conventional paints, as it contains a rust inhibitor, a primer with adhesion and a direct enamel.
How to paint pipes: step-by-step instruction. Step 1: prepare surfaces for painting
The main thing in the first stage of work is cleaning the old coating, in particular, places with rust. To do this, use a tin brush, which has a coarse bristle. Also it is necessary to use all sorts of solvents. As part of safety, wear gloves and a protective mask against fumes and dust. That the old paint was removed practically imperceptibly, the surface is heated with a hair dryer, and only then they begin to clean. After that, with a special coating, grease, dirt and dust are cleaned. All of the above is done in order to keep the metal as long as possible.
Step 2: priming the pipes for the durability of the service
The main guarantee of rust protection and uniform application of the finish coat is the priming of the surface. Builders recommend the use of alkyd paints, because they are able to cope with the safety of steel surfaces. Priming the coatings with one layer and waiting for the next work to continue until it dries completely.
Step 3: we paint the pipes
You will need a soft medium-sized brush. The paint should be applied in several layers, as this will give an even coverage. It is best to paint in 2 layers, with the second applied only after the complete drying of the 1 st. Do not use thick paint, because it stains in a thick layer, and when dried, it forms unaesthetic stains. Therefore, it is diluted with a solvent to lie flat.
Important! To protect the walls and floor from the paint spots, you can lay a plastic film on the surface and fix it with adhesive tape.
Also, in order not to have to repeat all the work again and again, the pipes must be absolutely dry.
How much paint is needed: the calculation formula
Usually on packages with paint denote how much paint is used per 1 m² in one layer. But if there is no notation, we can use a simple formula.
Pipe length( area) X Pipe diameter X number π( 3,14).
Do not forget to take into account the fact that the paint is applied in 2 layers, and then buy the right amount of paint.
How to paint polypropylene pipes
Often it is not necessary to paint plastic pipes, but to enhance the aesthetic qualities of the product, they are still painted. For plastic, as for metal, there is a primer, but from its use of use is not so much. The best paints for polymer products are mineral, acrylic, pentaphthalic and emulsion. The only thing that should not be used is water-soluble paint, as it will very quickly be erased when cleaning. You can use any color from the palette relating to the selected paint.
A visual demonstration of the above instructions is shown in the video.
Successes in repairing you! Add more colors to your home!