Pickling and rust removal
It is to immerse the steel components to be painted in an acid pool and use acid to remove oil and rust on the surface of the components. The pickling process is also efficient and the rust removal is relatively thorough, but the components must be rinsed with hot water or clean water after pickling. If there is residual acid, the rust of the components will be more severe.
Manual rust removal
It is to remove the rust on the steel components by manual use of some relatively simple tools, such as scrapers, grinding wheels, emery cloth, wire brushes and other tools. This method has low working efficiency, poor working conditions, and incomplete rust removal.
Sandblasting rust removal
It is a rust removal method that uses the pressure of compressed air to continuously impact the surface of steel components with quartz sand or iron sand to clean up the rust, oil and other debris on the surface of the steel to reveal the original color of the metal steel. This method is efficient and thoroughly removes rust. It is a relatively advanced rust removal process.
How to classify the rust level of steel structures?
Grade A: Steel surface covered with oxide scale and almost no rust
Grade AB: Steel surface that has rusted and some of the oxide scale has peeled off
Grade C: Steel surface where the oxide scale has peeled off or can be scraped off due to rust and there is a small amount of pitting
Grade D: Steel surface where the oxide scale has peeled off due to rust and pitting has occurred widely
Carbon Steel Tube
