Stainless steel refers to steel that is resistant to weak corrosive media such as air, steam, water, and chemical corrosive media such as acid, alkali, and salt, also known as stainless acid resistant steel. In practical applications, steel that is resistant to weak corrosion media is often referred to as stainless steel, while steel that is resistant to chemical media corrosion is referred to as acid resistant steel. Due to the differences in chemical composition between the two, the former may not necessarily be resistant to chemical media corrosion, while the latter generally has rust resistance. The corrosion resistance of stainless steel depends on the alloying elements contained in the steel.
After mechanical polishing of stainless steel surface, if no other treatment is carried out, the new substrate on the surface will still form a thin oxide film layer due to contact with oxygen in the air. After electrolysis or chemical polishing, some undergo passivation treatment to form a passivation film. If passivation treatment is not carried out, there will also be a thin oxide film. It can be said that metal generally forms an oxide film when in contact with oxygen in the air. Just some are obvious, some are not! Oxidized skin is a corrosion product formed by the oxidation of steel at high temperatures, consisting of ferrous oxide, ferric oxide, and ferric oxide. Oxidized skin can accelerate the corrosion of metals, so the larger the area of oxidized skin, the faster the corrosion rate of the steel substrate, and the more severe the corrosion.
Removing this kind of oxide film is a relatively troublesome problem. Traditional cleaning is time-consuming and labor-intensive, requires certain consumables, and is not very convenient to clean. On the other hand, laser rust removal cleaning machines can quickly clean the oxide layer, oil stains, etc. on the surface of stainless steel. Because it is a non-contact and non grinding cleaning method, it will not cause damage to the surface of the workpiece!
The principle of laser cleaning is to use high-frequency and high-energy laser pulses to irradiate the surface of the workpiece. The coating layer can instantly absorb the focused laser energy, causing oil stains, rust spots or coatings on the surface to evaporate or peel off instantly. This is a high-speed and effective cleaning method for removing surface attachments or coatings. The short duration of the laser pulse will not harm the metal substrate under appropriate parameters.
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