How and how to paint galvanized corrugated board
Is it possible to paint a galvanized corrugated board is of interest to quite a few people. Indeed, the scope of this material is diverse: from roofing to creating partitions and fencing.
Typically, corrugated board does not need staining, since the manufacturer covers it with a layer of galvanization. However, after ten to twelve years of operation, corrugated board will need to be further treated with protective materials to avoid corrosion and other defects.
In this article, we will consider how to paint a galvanized corrugated board.
The content of the article
Why paint corrugated board
Painting a galvanized corrugated board is not a difficult task and has a number of advantages that are difficult to argue. Moreover, the price of the work is not high, but the effect is positive.
Let's look at the reasons why it is worth covering corrugated board:
- Extending the life of corrugated board due to protection against corrosion and weather conditions;
- Increasing the hardness of the material;
- Decking is not exposed to sharp heat drops;
- Also, a change in color may well be an important factor.. After all, galvanizing may not be suitable for the design of the room.
Caution: Painting is primarily a protection that will extend the life of the material for a long time.
It is better to use paints of French, Italian or German brands for coloring corrugated board. They are able to provide all of the above advantages and increase the durability of corrugated board. You can look at additional and necessary information on video in this article and a photo.
What to use for coloring corrugated board
To the question of what to paint corrugated board, there are several answers, more precisely options.
So:
- The most elementary method is the removal of damage resulting from the transportation of galvanized corrugated board. Removing damage such as scratches, scuffs, or chips is necessary to prevent damage to the material over time. For these purposes, a special spray paint is used, with the help of which, all places with defects on the corrugated board are carefully cleaned and painted.
- Alkyd enamel is also suitable for staining corrugated sheets. Manufacturers of such enamel can present a wide range of colors that can be compared with polymer coatings.
- Such enamel can protect corrugated board from adverse weather factors., sun rays, temperature surges.
Before proceeding with staining with alkyd enamel, the surface of the corrugated board must be carefully cleaned and dried.
Attention: If the surface of the corrugated board needs to be painted completely, then powder paint is used, which contains polymer fine powder, tar, pigment and target additives. When heated, the constituent components polymerize, resulting in a uniform and durable coating.
Coloring the surface of the corrugated board with powder paints is capable of:
- Create protection against ultraviolet radiation and weather conditions;
- To protect the material from the effects of chemical compounds, alkalis, acids, oil products;
- Provide shock resistance, elasticity, rigidity to the material;
- Even with a single application, increase the coating thickness by 60-300 microns.
Powder paints (see How is powder coating of metal products carried out?) are used ready-made and do not require additional use of solvents. It is safe to work with such paint, since it does not cause allergies and irritations, and is fireproof.
Decking painted with such a paint is able to extend the life of up to thirty years. To achieve maximum effect, several steps must be followed.
First, the surface of the material is degreased, then it is necessary to phosphate the surface and thoroughly dry it. After applying powder paint to the corrugated sheet, the material is polymerized, that is, the surface is heated.
Methods for coloring corrugated sheets
Among the methods of staining galvanized corrugated board can be noted:
- Airless;
- Pneumatic;
- Combined;
- Electrostatic.
The method of painting depends on the chosen varnish dye, which includes: plastisol, polyester, enamel, thermopolymer paints. It is worthwhile to dwell in more detail on the technologies of staining corrugated board.
Airless paint technology
This technology is used to paint corrugated sheets with a flat surface.
- The paint material is applied to the surface under pressure, and the pneumatic flow is sharply reduced at the outlet. Thus, the surface is evenly coated with paint, ensuring high economy of paint consumption.
- With airless painting, there are no paint fumes, which is good for worker safety.
Attention: The quality of painting by this method is an order of magnitude lower, especially for corrugated board with a relief surface.
Pneumatic coloring of corrugated board
The quality of surface painting with this method depends on:
- Forms of the painting torch;
- The ratio of compressed air and paint;
- Pneumatic flow rates of grains of varnish-and-paint material.
For pneumatic painting of the surface, compressed air is used, leaving the spray torch, consisting of an aerosol. Such painting forms a large number of paint vapors, as a result of which a lot of material is consumed, and for the safety of workers it is necessary to use a powerful hood.
Combined coloring of corrugated board
For combined staining, sufficiently sophisticated equipment is required, which ensures the movement of grains of the paintwork material and the formation of a torch due to compressed air. Paint is applied to the plane from the nozzle of the coloring device, while the tip of the spray gun allows you to form a perfect torch, due to the auxiliary atomization of the paint particles.
Electrostatic staining
This technique is the most economical of the above. The essence of the method consists in the formation of tiny particles of paint of an electric charge. An electrostatic field is formed between the paint surface and the metal components of the paint-sculler, along which charged particles of paint move.
Attention: As with the airless method, electrostatic painting is ineffective with embossed corrugated surfaces.
The most modern method of staining corrugated board is the use of powder paints. Identical staining techniques for the construction market do not yet exist. Such coloring provides high quality painting with varying degrees of gloss and shape.
The uniqueness of the paint lies in its composition. It contains grains of paint and rubber, and does not contain solvents. The staining process itself is quite time-consuming and not always possible in private conditions.
For painting with powder paints:
- Pre-prepare the surface, namely degrease it and form a phosphate film on it;
- Apply thermopowder paint;
- Provide polymerization of the paint. To do this, warm the powder at a temperature of 200 degrees for 15 minutes.
Despite the complexity of the coloring process, it is precisely the painting with thermopowder paints that makes it easy and quick to apply varnish-and-paint material to the surface of any complexity.
Recommendations for choosing a varnish-and-paint material for painting the surface of corrugated board
There are several recommendations when choosing paint and technology for painting the surface of corrugated board. These simple tips can increase the life of the corrugated board by several years.
- First of all, it is necessary to determine the color of the paintwork material. It is necessary to proceed from the general view of the building so that the corrugated board does not stand out, but looks proportionally.
- Next, you need to determine the most effective and economical way of staining. Since painting with powder paints requires further thermopolymerization at high temperatures, this method is not acceptable for painting private houses. This technology is applicable only at the plant level.
You should pay attention to the characteristics of the paint itself, namely:
- Will the paint provide additional reliability and strength of the surface of the corrugated board, resistance to temperature extremes, adverse weather factors, ultra-resistance to sun rays;
- The ability of paint to corrosion;
- Safety of use of paint, both during application and further operation of the painted product;
- Quality of surface painting: lack of streaks and streaks;
- Admissibility of using corrugated board after painting in extreme frost or heat.
As you can see, you can paint the surface of the corrugated board with various techniques and with your own hands. In this case, the paint must be selected so that it meets all the requirements for its operation.
Coloring corrugated board is a rather complicated and time-consuming process that requires attention to the choice of both the paintwork and the painting method itself.
Is it possible to paint galvanized corrugated board you already know. The most important thing is not to rush and do it carefully, the instruction will help you choose the material and avoid mistakes.
