What is the role of steel plate pretreatment line
In order to give full play to the protective and decorative effect of the coating on the substrate, in addition to the quality of the coating itself, the quality of the surface treatment of the substrate and the construction level directly affect the quality of the coating project.
Practical experience shows that most of the coating defects come from bad surface treatment, and any coating can not play its performance on the poorly treated surface.
Painting on oxidized, rusted and oiled surfaces is a big waste of both time and money, and high grade surface treatment quality will extend the service life of the coating.
The surface treatment of steel plate before painting is divided into two stages
After the steel plate comes into the factory, the raw material of steel is treated before processing to remove the surface oxidation and rust, and after reaching the standard of rust removal, a temporary protective workshop primer is applied to ensure that the steel will not continue to corrode in the process of processing and manufacturing the components. construction cycle.
Another order in the domestic shipbuilding, container, large machinery industry, generally with steel pretreatment line equipment on the shot blasting machine shot blasting method of abrasive treatment, spray abrasive treatment and pickling treatment in three ways.
Among them to obtain high efficiency and high quality automatic flow operation, there is still only shot blasting treatment method.
Shot blasting treatment is the use of the impeller of the blasting machine in the high-speed rotation of the centrifugal force generated by the projectile material (steel shot, steel wire segments, angular steel sand, etc.) to a very high speed shot to the surface of the steel to be treated, to produce a blow and grinding effect, remove the steel surface oxidation and rust, so that the steel surface to reveal the original color of the metal and present a certain degree of roughness, in order to facilitate the adhesion of coatings.
Shot blasting pretreatment line, in general, there are two types: one is the steel pretreatment line, the other is the steel pretreatment line, the two working principle is the same, now shipyards, containers, large port plant using the first method, general steel production plant with two methods, the two methods are the same purpose is to ensure the quality of coating. The surface treatment of steel is called "second rust removal" when the steel is processed into a workpiece and then combined into a whole, which is not adopted in general.