Following are the various types of paints adopted for safeguarding steel structure in coastal regions:
- Cement Paint: Cement paint contains dry cement as a base mixed with the boiled linseed oil which acts as a vehicle. They are available in many shades in the form of powder. They have a good water-proof in quality. They also possess good strength, density, hardness and durability they provide an excellent decorative appearance.
Uses of Cement paints
- Painting brickwork, stone masonry and concrete which is already plastered
- Painting of corrugated iron sheets.
- Lasting finish in offices, public building, hotels etc.
- Bituminous and Tar Paint: Bituminous paints contain bitumen as a base, They are highly resistant to alkalis and also exhibit a good covering power. The surface which is painted with this paint is rendered with a black colour that can be modified by mixing the colouring pigments.
- Aluminium paint: In aluminium paints finely ground aluminium powder is dissolved in drying spirit vanish or slow drying oil varnish depending upon the requirement of the paint. When the spirit or oil gets evaporate, a thin metallic film is formed on the surface which is painted. Aluminium paints possess certain qualities which are as follows,
- It prevents the rusting of iron steel in a better way compared to any other paint.
- It exhibits good waterproofing and water-resisting qualities
- It renders a good appearance to the surface painted because of its silvery shining texture
- it has a great spreading power
- They are good heat and electric resistant.
- Oil Paint: Oil paint generally refers to the ordinary paints which consist of two main ingredients such as base and a vehicle. In addition to these two ingredients, it may also contain drier, inert filler and colouring pigments. They exhibit a good appearance, good capacity, considerable durability and resistance against the atmosphere weathering agencies.
Uses of Oil Paints
Oil paints can be variably applied on all the surfaces of internal nature such as walls, ceilings metalwork, woodwork, etc.
- Enamel Paints: The main constituents of enamel paint are metallic oxide, oil, petroleum spirit and resinous matter mixed with each other.
Uses of Enamel Paints
They are used for painting of stairs, decks, porches, concrete surfaces, etc.
- Rubber base Paint: Rubber base paint is obtained by dissolving synthetic resins in suitable solvents and are further mixed with other pigments. It has excellent acid, alkali and moisture resistant properties, dries quickly and is of moderate cost.
- Anti-corrosive Paint: The main constituents of this paint are oil, a strong drier and colouring pigment which is mixed with pure and very fine sand the paint after its application on the surface provides the surface with the black colour which lasts for a long period of time.
- Graphite Paints: Graphite paints are generally adopted for painting the black colour materials. These paints are very durable and are unaffected by sulphur films, ammonia (or) chlorine gases. Therefore, it can be used for painting steel structures in the coastal region.