Colour Coating of Steels Sep14

Colour Coating of Steels...

Colour Coating of Steels  Colour coating is a term used to describe the application of a decorative and/or protective organic coating to steel substrate supplied in coil form. Colour coated steel is also called as pre-painted steel. Colour coatings are paint coatings and are specialty products, which are used to give the steel a long term protection under a broad range of corrosive conditions, extending from atmospheric exposure to full immersion in strongly corrosive solutions. A colour coating provides little strength to the substrate steel, yet it protects the steel so that its strength and integrity can be maintained. Colour coating of steel is a continuous and highly automated industrial process for efficiently coating of coils of steel. In this process of application of colour coating, the substrate steel gets protective and decorative coating. This process of colour coating is also called a duplex coating. The process of colour coating of steel according to EN 10169:2010 is a ‘process in which an organic coating material is applied on rolled metal strip in a continuous process which includes cleaning, if necessary, and chemical pre-treatment of the metal surface and either one side or two side, single or multiple application of (liquid) paints or coating powders which are subsequently cured or / and laminating with permanent plastic films’. The first colour coating line was started in Europe during 1940s. It became immediately very popular due to its basic inherent advantages which are given below. Higher productivity A highly sophisticated and computerized controlled coating application Environmental benefits and energy saving More consistent properties of the coated sheets Lesser wastage of coating material Colour coating usually refers to the application of liquid paint coat over the substrate in an automatic, continuous process after pre-treatment. The pre-painted colour coated steel is a...