Types Of Paints

The brief descriptions of different types of paints are given below:

(1) Aluminium paint: The very finely ground aluminium is suspended in either quick-drying spirit varnish or slow-drying oil varnish as per requirement. The spirit or oil evaporates and a thin metallic film of aluminium is formed on the surface. The advantages of an aluminium paint are as follows:
     (i) It is visible in darkness.
     (ii) It resists heat to a certain degree.
     (iii) The surfaces of iron and steel are better protected from corrosion by this paint than any other paint.
     (iv) It possesses a high covering capacity. A liter of paint can cover an area of about 200 m².
     (v) It gives good appearance to the surface.
     (vi) It is impervious to the moisture.
     (vii) It possesses high electrical resistance.

The aluminium paint is widely used for painting gas tanks, hot water pipes, marine piers, oil storage tanks, radiators, etc.

(2) Anticorrosive paint: This paint essentially consists of oil and a strong drier. A pigment such as chromium oxide or lead or red lead or zinc chrome is taken and after mixing it with some quantity of very fine sand, it is added to the paint. The advantages of as anticorrosive paint are as follows:
     (i) It is cheap.
     (ii) It lasts for a long duration.
     (iii) The appearance of the paint is black.

(3) Asbestos paint: This is a peculiar type of paint and it is applied on the surfaces which are exposed to the acidic gases and steam.

(4) Bituminous paint: this paint is prepared by dissolving asphalt or mineral pitches or vegetable bitumen I any type of oil or petroleum. A variety of bituminous paints is available. The paint presents a black appearance and it is used for painting iro

Following are the advantages of cement paints:
     (i) It requires less skill and time for applying cement water paints and the applying implements can be cleaned with water only.
     (ii) The preparation of surfaces is easier in a cement paint system as it is not necessary to remove the previous coats of cement paints.
     (iii) They are suitable for painting fresh plasters having high alkalinity because cement paints are not likely to be attacked by the alkalinity of masonry surfaces.
     (iv) They become an integral part of the substrata and add to its strength.
     (v) They can be applied over new and damp walls which cannot be painted over with oil paints until they are sufficiently dried.
     (vi) They prove to be economical as compared to the oil paints and they dry more rapidly than the oil paints.

Following precautions should be taken to avoid defects or complaints of the cement paints: