The rapid development of modern science and technology constantly introduces advanced scientific methods of cleaning rust , makes the modern descaling technology achieve rapid development. There are many different kinds of rust removal method, here are several technologies which have been widely applied. All worker in related industrial may find out the best method to remove rust, and constantly promote rust cleaning technology in modern industrial production.
High pressure water jet for rust removal
High-pressure water jet rust cleaning technology is a new technology developed rapidly in the 1970s. It takes water as the medium, and forms high pressure through high-pressure water generating device, and then jets out water with concentrated energy and high speed through special nozzle, and finally finish the rust removal of the object.
Compared with chemical derusting, high-pressure water jet has the characteristics of no pollution to the environment, no corrosion of cleaning objects, high cleaning efficiency and energy saving, and can effectively remove the special stains that are insoluble or insoluble among some certain chemical agents. Therefore, high pressure water jet cleaning technology has become a rising star in the field of cleaning. It can replace part of traditional artificial mechanical cleaning.However, this method consumes a large amount of water and may waste water resources.
Chemical pickling method
This can be divided into tank pickling method and cycle pickling method.
Tank pickling method is to put the workpiece to be cleaned in the acid and achieve the purpose of derusting through the reaction between acid and rust. It is simple to operate, but there will be a lot of pollution and a large amount of work to be done.
Cycle pickling method is divided into out-of-line cycle pickling and online cycle pickling. Out-of-line cycle pickling is to remove the workpiece from the assembly line and form a loop for cycle pickling. This method requires a lot of work and requires secondary installation,and also will cause pollution. It is rarely used alone now.
Ultrasonic derusting
Ultrasonic wave technology has been successfully applied to multifunctional steel surface treatment technology, which is a relatively advanced technology in surface engineering at home and abroad.This technology integrates ultrasonic oil removal, rust removal and phosphating. In addition to the high degree of metal surface purification, fast phosphating speed, low pollution and energy saving characteristics, it can also better solve the problem of complex parts, such as edges, angles and holes. The ultrasonic device design is advanced, of reasonable structure, stable performance and reliable operation and will simplify the process, reduce the labor intensity of workers. It has achieved good economic benefits. Especially in the surface treatment before painting, it has a broad promotion value and application prospect.
Sandblasting derusting
Sandblasting derusting technology refers to the one that using a certain size of abrasive (quartz sand, river sand, iron sand, iron shot, etc.), under a certain air pressure, jet them to the surface of iron and steel. By the hardness, toughness and angles of the abrasive itself, get the rust removal done on the iron and steel surface. Compared with other derusting methods, this method has better derusting quality and surface roughness, and has higher derusting efficiency for large equipment. But its disadvantage is obvious, that is a large amount of dust will be produced and pollute the environment and seriously endanger the health of operators.However, in practical work, especially in many important corrosion protection construction, there are higher requirements for steel surface rust removal, and some regulations must meet the first or second level standards issued by the Ministry of Chemical Industry. And obviously, only sandblasting can meet the requirements.It is still widely used in corrosion - resistant engineering, even though there are many disadvantages in sandblasting.
Laser rust removal
Laser cleaning technology refers to the process of using high-energy laser beam to irradiate the surface of the workpiece to make the surface dirt, rust or coating instantly evaporate and peel off, and achieve the cleaning process. As a novel cleaning technology, laser cleaning technology has been applied in many cleaning fields, including mechanical industry, microelectronics industry and art protection. Laser rust removal is an important application field of laser cleaning technology. Compared with mechanical derusting, chemical derusting and other traditional derusting methods, laser derusting has the following characteristics.
The cleanliness is much higher than chemical cleaning technology.
A wide range of applicable base materials.
The laser can effectively remove rust without damaging the surface of the base material.
The laser derusting equipment can be used for many times with low operating cost.
Laser cleaning technology is a kind of "green" cleaning technology, which does not pollute the environment. Laser derusting shows a good application prospect in equipment maintenance.
Conclusion
Through the comparison of the above several rust removing methods which have been widely applied in modern industry, we can see their respective advantages and limitations. In practical work, we should fully understand the actual situation, and give full play to the advantages of all kinds of cleaning technology, continuously develop the rust removal methods, further improve the modern advanced science and technology in the field of rust removal.
