Home / Mill Surface Defects / Rust (Red Drip Type)
What is it?
This defect looks like oval-shaped drips of rust throughout the coil. It can be called red rust or rinse stain. The defect usually happens due to a leak in the rinse tank that sits above the pickle line’s accumulator. As steel fills the accumulator, the car passes under the dripping tank and rinse solution drips onto the sheet.