Some people will say: Does stainless steel grating still need maintenance? Stainless steel itself will not corrode, wrong! Stainless steel gratings will still corrode and require maintenance and upkeep. For cost reasons, many domestic manufacturers have reduced chromium and nickel and increased the manganese content in the raw materials of stainless steel gratings. Experts believe that stainless steel gratings are one of the raw materials for stainless steel gratings. Therefore, it can be rust-free because of the presence of chromium and nickel. Reducing the content of these two components will reduce the anti-rust performance.
The principle of corrosion resistance of stainless steel grating
Although the stainless steel grating has been pickled and polished, it relies on the formation of an extremely thin, strong, fine, and stable chromium-rich oxide film (protective film) on its surface to prevent oxygen atoms from continuing to penetrate and oxidize, thereby obtaining rust resistance. , once for some reason, this film is continuously damaged, the oxygen atoms in the air or liquid will continue to separate out, forming loose iron oxide, and the surface of the stainless steel grating will be continuously corroded.
The surface of the stainless steel grating exposed in the corrosive environment undergoes an electrochemical reaction or chemical reaction and is uniformly corroded. The passive film on the surface of the raw material of the stainless steel grating has weak corrosion resistance. Due to the self-excited reaction, a pitting reaction is formed and small holes are formed. In addition, the chlorine ions are close to form a very corrosive solution, which accelerates the speed of the corrosion reaction. There is also intergranular corrosion cracking inside the raw material of the stainless steel grating. All of these have a destructive effect on the passivation film on the surface of stainless steel grating.
Media causing corrosion of stainless steel gratings
Cleaning up dust in the air
There is often a lot of dust in the air, which constantly falls on the surface of the stainless steel grating. They can be removed with water or alkaline solution. However, adherent dirt requires high-pressure water or steam to clean.
Scratches
In order to prevent the accumulation of process lubricants or products and dirt, scratches and other rough surfaces are usually removed mechanically with a stainless steel special polishing machine.
Welding marks
When the welder strikes the arc on the surface of the stainless steel grating, it will cause surface roughness defects. If the protective film is damaged, these welding processes will leave small flux particles on the surface, which cannot be removed by ordinary cleaning methods. These particles will be the source of crevice corrosion, and mechanical cleaning methods must be used to remove these residual fluxes.
Maintenance tips
Therefore, the surface of stainless steel grating must be cleaned and maintained regularly to maintain its gorgeous surface and extend its service life. When cleaning the surface of stainless steel grating, care must be taken to avoid surface scratches and avoid using bleaching ingredients and abrasives. Washing liquid, steel wool, grinding tools, etc., in order to remove the washing liquid, rinse the surface with clean water after the washing is completed.
Therefore, in order to use the stainless steel grating for a longer period of time, the stainless steel grating must undergo surface pickling and polishing before leaving the factory. Failure to do surface treatment will only shorten the use time of the stainless steel grating. It should also be done during use. Good maintenance.