Metal rust is a chemical reaction, which is essentially the oxidation reaction of metals. The most common rust phenomenon is that iron products are oxidized by long-term exposure to air and oxygen, or are eroded by oxygen in water to become oxides.

After some metals rust, a dense oxide film will be produced to prevent further oxidation of the metal, such as aluminum oxide. While the loose oxide film produced after some metals rust accelerates metal oxidation, such as rust. All metals in different environments will produce oxidation or other chemical reactions. Strictly speaking, there is no metal that does not rust.

The traditional rust removal method can cause damage to the surface of the workpiece, cleaning is not clean, causing environmental pollution and other problems. Laser cleaning is a new type of environmentally friendly cleaning method with no grinding and non-contact type. At the same time, it can solve the problems that traditional cleaning methods cannot solve. It is considered the most reliable and effective solution. The principle of laser cleaning is to use high-frequency and high-energy laser pulses to illuminate the surface of the workpiece, and the coating layer can instantly absorb the focused laser energy, so that the oil stains, rust spots or coatings on the surface are instantly peeled off, and the surface attachments or surface coatings are effectively removed at high speed. The cleaning method, while the laser pulse with short action time will not harm the metal substrate under the appropriate parameters.

Laser rust removal has more advantages than traditional rust removal methods, both technically and socially and economically. For example, in technology, laser rust removal equipment can precisely control the rust removal area; only remove surface contaminants/attachments; can be hand-held or automated cleaning. Socially and economically, laser rust removal equipment does not use chemical cleaning, does not pollute the environment, and does not make a lot of noise; laser rust removal equipment is easy to operate, personnel can quickly get started, and solve the problem of difficult labor. Laser rust removal equipment has high rust removal efficiency, which can reduce a certain amount of manpower.