- How to choose paint for a car. Types of automobile paints and enamels
How to choose paint for a car. Types of automobile paints and enamels
The quality of the painting of the car body, to appreciate that even a novice car enthusiast, largely depends on the right choice of car paint.
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Composition and properties of automotive paint
Regardless of the type of paint in its composition always consists of three main components: pigment, solvent and binder. The pigment sets the tone and color of paint, the binder fixes the pigment to the surface of the body and cover the paint after it dries a glossy protective layer and the solvent is desired to give the paint the required degree of fluidity.
An important parameter of any paint is its hardness, expressed as a percentage relative to the hardness of glass. On the body, painted with a soft paint will cause scratches even with a slight mechanical influences. If you use too hard of a paint in places vibrations and bending of body parts will inevitably receive chips and cracks.
This is why it is so important to find a middle ground between the hardness and ductility of automotive enamel. The hardness of most modern paints is in the range from 50 to 55%.
They are called nitropaints. Appeared for a long time and are used for painting cars almost from the beginning of the era of mechanical engineering. Nitro, part of the pulp and inks, ensures fast drying at normal ambient temperatures. On the painted surface does not have time to settle the dust, so painting does not require any special camera.
Due to the fact that cellulose paint quickly fade and after drying require additional polishing, currently they are used mostly for minor repairs.
Also used in painting works for a long time, however, unlike cellulose paint, when applied to the painted surface creating a more durable and thick layer of enamel, smooth and glossy surface, which after drying does not need to be polished. For quality paint body enough applying one layer of paint.
And they are not without drawbacks. For curing paint layer at temperature of about 200 required at least one day, however for another 30 days until full cure of the paint, it is quite sensitive to mechanical stress and the effects of solvents and other chemically active substances.
To reduce the time of drying glyptal enamels allows drying at temperatures up to 800 C. Another way to accelerate the solidification of the paint is the introduction of the modern glyptal materials of different drying activators and hardeners. The popularity of this type of paint at automotive painters with each year is falling.
Are one of the most popular types of car paints. The main reason for their popularity is the coating after hardening becomes uniform gloss and needs no polishing.
High temperature drying is not required due to incorporation into the enamel is a special hardener, it rapidly cures even at 200 C. in addition, in the process of drying paints have the ability to resolve small defects caused by staining.
Disadvantages of acrylic enamels, two – the need to apply them in two or three layers and fairly high cost.
Not less popularity is used alkyd enamel. Being significantly cheaper than acrylic paints, they provide high reliability and quality paintwork.
Application of alkyd enamel is usually straightforward, the paint lays down smooth with a thick layer, and after drying, the coating becomes uniformly glossy, resistant to aggressive environments and mechanical damage.
Its only disadvantage is the long drying time.
A novelty in the world of automotive enamels are powder paints. With the help of special equipment small particles of dry paint and magnetized by spraying applied on the car body. After exposure to high temperatures, the paint particles melt and create a surface dense layer is a uniform coating.
Some metal surfaces using powder coatings is not limited, they can be used to paint plastic and glass parts of the car body. The resulting coating has high strength and durability.
The disadvantage of using powder coatings is the need to purchase high-tech equipment.
water based Paint
Technology of water based paints just a few years, however, new type of paints is rapidly gaining popularity all over the world. Instead of a toxic solvent they use ordinary water. Due to the extremely small size of the pigment particles, these paints have excellent adhesion and covering power, and therefore can be applied directly to old paint.
Since water evaporates slower than solvents, water-based paints dry much longer than other types of automobile enamels. For applying such inks requires expensive equipment, however with advances in technology it will quickly become popular and will be widely disseminated.We wish you to choose strong and durable paint that is optimal in price and quality!
Good luck to you! No nail, no wand!