What is the most advanced method for coating metal?

Coil coating is a continuous, automated process for coating metal before fabrication into end products. The steel or aluminum substrate is delivered in coil form from the rolling mills. The metal coil is positioned at the beginning of the coating line, and in one continuous process, the coil is unwound, pre-cleaned, pre-treated, pre-primed, and prepainted before being recoiled on the other end and packaged for shipment. All of this happens at up to 700 feet per minute!

 

The following steps take place on a modern coating line:

Stitching the strip to the previous coil

Cleaning the strip

Power brushing

Pre-treating with chemicals

Drying the strip

Applying primer on one or both sides

Curing (often only 15 to 60 seconds!)

Cooling the strip

Top coating on one or both sides

Second curing

Cooling down to room temperature

Rewinding of the coated coil