Introduction to Color Coated Galvanized Steel Coil

Albany NY

10 May, 2022

5:09 AM

Description

Color coating on steel gives it a protective organic coating that makes the steel long-lasting protection even just in corrosive conditions. This coating does not improve the strength of the steel but gives it the required protection to ensure that its integrity and strength are maintained. The process of production of color coated steel coil is just one that is highly automated. This coating is additionally known as a duplex coating. This organic coating is used on the coil in the continuous process that includes its cleaning, chemical pre-treatment, and the use of primers and paints. The paints are then cured or can be laminated with permanent films of plastic. Europe pioneered industrial coating lines in the 1940s and also the advantages that it had made it ever more popular, like higher productivity, energy saving, consistent properties from the sheets, and lesser wastage from the coating material. The pre-painting of sheets in controlled conditions gives these coatings a benefit over the same galvanized sheet being painted after it is actually placed in any application. Finishes are smooth, and might have a high gloss, matt, or textured finish. The thickness of coatings varies from 15 to 40 microns. Standard PPGI steel sheets have thicknesses that vary form 0.2 mm to 1.2 mm and widths range from 600 mm to 1600 mm. Lengths can differ according to the customer requirements. Color coating can be employed on any form of steel, whether it is cold rolled or galvanized. Galvanizing the steel can be a separate process, where zinc or a combination of zinc and aluminum is applied to the steel by hot dipping it within these metallic solutions. So one coated galvanized steel coil will have this coating of zinc over the base metal which is then further protected by the color coating. This coating will have a pre-treatment chromate coating, a primer coat, and so the top paint. It could also be given a guard film. A color coating line will coat both cold rolled steel and steel containing received any other metallic coating. Within this process, the coil is uncoiled and its particular head mechanically joined towards the previous coil that had been coated.Before any paint or primmer is used towards the steel coil, it must be pre-treated to ensure there is better adhesion in the paint. This is done by applying a chemical treatment that assists the top of the steel to bind with any coating. The strip might need to be washed and dried before any chemical is applied that can provide the pre-treatment chromate coating. As soon as the pre-treatment solutions are completed the coil will likely then be given a coat of the chosen primer. These primers also contain corrosion inhibitors and can be of different types according to the paints that happen to be to form the hue coating. The color coating lines are equipped to use the primer or paint on sides simultaneously, in the strip being coated. In the end, the coats are applied, and the strip then passes in a convection oven, where the coatings are cured by heat.