Our daily life and industrial production are inseparable from the application of laser cleaning machine in rust removal, because in production life will use a large number of metal components and equipment, the corrosion of metal to life and production brought inconvenience and harm. Equipment is damaged by corrosion and has to be renewed regularly, which is a direct loss. Direct losses can be quantified, while indirect losses are difficult to calculate, often much greater than the direct losses, such as waste of raw materials, affecting product quality, pollution of the environment. In factories, changes in machine performance due to corrosion can cause a large increase in subsequent production costs, and corrosion of some parts may also cause explosions and fires; nowadays, reinforced concrete structures are used in large numbers in houses and bridges, where concrete is wrapped in steel, and if the steel rusts, it will cause the concrete outside of it to spall off, creating serious structural problems and making it impossible to carry loads. This is one of the common failure modes in reinforced concrete construction.
Corrosion causes damage to engineering equipment, critical structures, and infrastructure, which in turn can cause catastrophic accidents. Especially in buildings closely related to life, oil and gas related plants, corrosion is more likely to cause huge economic losses and even casualties. 1983, the Millers Bridge in Greenwich Township, Diggs, USA, caused the bridge deck to collapse due to internal rusting and fracture of the bearings used, causing the bridge deck to change forces, resulting in the death of three drivers who were on the bridge at the time and fell into the river. 2013, Qingdao Pipeline Explosion The cause of the accident, which resulted in significant casualties and economic losses, was a leak caused by pipeline corrosion, which led to the explosion. In fact, the damage caused by corrosion is greater than the sum of all natural disasters. According to the International Association of Corrosion Engineers (NACE) survey, the global annual loss due to metal corrosion amounted to 2.5 trillion U.S. dollars, equivalent to about 3.4% of the global gross domestic product. Economic losses due to corrosion in the annual GDP of countries on average more than 3% (and China is more serious, about 5%).
Therefore, preventing equipment and components from rusting is a very important task in production and life. In order to prevent equipment corrosion, it is often necessary to first apply a layer of paint in the production of equipment to isolate it from the atmosphere. However, in industrial production, due to the division of labor and process problems, metal materials cannot enter the painting process immediately after production, but are placed in the warehouse or even stacked in the open air. We know that metal materials such as carbon steel materials, in a humid environment within a short period of time (a few hours to a few days) can form a corrosive material, called floating rust, belongs to the initial corrosion layer of corrosion occurs.
If the paint is brushed on the corrosive layer, it will be easy to fall off with the corrosive oxide, so before painting and coating, the metal surface must be clean and corrosion-free, and the rust must be removed from the metal material. Even if painted, due to the wear and tear during use, aging of the paint, oxygen and water vapor diffusion in the environment into the substrate, metal equipment will still produce corrosion. Generally start with local paint layer damage rust, over time, corrosion is serious, a large piece of paint layer peeling off. In order to prevent the corrosion from expanding and becoming serious, repairs are required, and the repairs require removing the paint along with the generated corrosion. Therefore, rust removal is essential and an important part of production, both for component equipment before painting and for instruments after use.
