What's a good way to remove rust from steel plate?
As we all know, steel plates are easy to rust after being placed for a long time, which not only affects the appearance, but also affects the use. So what's a good way to remove rust from steel plates? Xiao Bian sorted out several methods for rust removal of steel plates for your reference.
1、 Rust removal of shot blasting machine
As the name implies, rust removal by shot blasting machine refers to the use of steel plate mobile shot blasting machine or the impact of steel grit by shot blasting machine on the surface of steel plate to achieve the effect of rust removal. Commonly used are through shot blasting machine and steel plate mobile shot blasting machine. Both types of shot blasting equipment can perfectly solve the problem of rust on the surface of steel plate. The difference is that through shot blasting machine is highly efficient, but it covers a large area and is very troublesome to move; While the steel plate mobile shot blasting machine is less efficient, it has the advantages of portability, portability, convenient mobile transportation and simple operation.
As far as the effect is concerned, the shot blasting machine can reach the highest metal blasting grade SA2.5-SA3. In terms of cost performance, it can greatly release labor, and the abrasive is recycled, and the cost of steel sand is low. Therefore, the rust removal and surface pretreatment of ship hull, steel bridge deck, H-beam, etc. are more and more widely used. Shot blasting machine has been the most commonly used rust removal method on the market.
2、 Manual rust removal
This is a long and hard process. The derusting effect is not ideal with the help of shovels, grinders and other tools. Now few enterprises use such a waste of labor to derust.
3、 Rust removal by pickling
Acid pickling derusting is to dissolve metal oxides by reacting acid and metal oxides in acid pickling solution to remove oxides and rust on steel surface. Although the effect of pickling for rust removal is very good, the pickling process has been gradually eliminated in China because the wastewater from pickling cannot be discharged, causing environmental pollution.
Common pickling methods include common pickling and comprehensive pickling. After pickling, the steel is easy to be oxidized by air, so passivation treatment must be carried out to improve its rust resistance.
4、 Flame derusting
Flame derusting of steel plate refers to the use of wire brush to remove the rust attached to the surface of steel plate after flame heating. Before derusting the steel plate surface, the thick rust layer attached to the steel plate surface shall be removed first, and then the flame heating shall be used for derusting. When using this method, care must be taken not to burn through the metal surface and prevent large areas of surface from thermal deformation.