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Derusting method on metal surface, steel structure manufacturer

by:Lida Group     2022-03-05

Derusting method on metal surface, steel structure manufacturers

We all know that there is an oxide layer on the metal surface, which can prevent rusting, but due to environmental influences and considered damage problems, metal Surfaces rust easily, and steel structures are no exception. In order to solve this problem, steel structure manufacturers need to master the following surface rust removal methods.

There are four methods for removing rust on metal surfaces: manual treatment, mechanical treatment, chemical treatment and flame treatment.

1. Manual treatment

Removing rust by hand knocking, shoveling, scraping, brushing, and sanding is a traditional rust removal method for painters, and it is also a simple method without any environmental and construction conditions. It is suitable for small-scale derusting treatment of steel structure manufacturers.

2. Mechanical rust removal method

The main mechanical rust removal method for steel structure manufacturers It is to use some electric and pneumatic tools to achieve the purpose of removing rust. Commonly used power tools such as electric brushes and electric grinding wheels; pneumatic tools such as pneumatic brushes. Electric brushes and pneumatic brushes use the rotation of a special round wire brush to remove rust or oxide scale by impact and friction. Especially for surface rust, the effect is better, but it is difficult to remove deeper rust spots. The electric grinding wheel is actually a portable grinding machine, which can be moved freely in the hand. The high-speed rotation of the grinding wheel is used to remove rust, and the effect is good. Especially for deep rust spots, its work efficiency is high, the construction quality is also good, and it is easy to use. The ideal rust removal tool. However, care must be taken not to pierce the metal skin during operation.

3. Sand blasting and shot peening treatment method

Membrane usage.

4. Flame treatment method The flame treatment method is to use a gas welding torch to burn a small amount of deep rust spots that are difficult to remove by hand, and let the high temperature change the oxides of the rust. Chemical composition to achieve the purpose of rust removal. Using this method, care must be taken not to burn through the metal surface and to prevent thermal deformation of large surfaces.

5. Chemical treatment method

The chemical treatment method is actually a pickling and rust removal method, which uses an acid solution and metal oxidation. The material (rust) reacts chemically to form salts, which are separated from the metal surface. Commonly used acid solutions are: sulfuric acid, hydrochloric acid, nitric acid, phosphoric acid. During operation, the acid solution is applied to the rust part of the metal to allow it to slowly react with the rust to remove it. After the rust is removed, it should be rinsed with clean water, neutralized with a weak alkaline solution, and then rinsed with clean water, then wiped dry and dried to prevent it from rusting quickly.

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