The advantages of dry ice cleaning have been deeply rooted in people's hearts, but there will be various problems in the process of dry ice cleaning services, and many people will have questions. The editor will answer the questions people often ask.
1. Will dry ice cleaning cause impact depression on the surface of the workpiece?
Dry ice blasting is similar to sandblasting. Dry ice particles are sprayed onto the surface of the workpiece through compressed air, which will have a certain impact on the surface of the workpiece. However, the dry ice cleaning process does not rely on the friction between the dry ice particles and the surface of the workpiece to remove stains, but to freeze the stains on the workpiece. The hardness of dry ice particles is only 2MOHS. Even if the dry ice particles directly collide with the surface of the workpiece, they will immediately shatter without damaging the surface of the workpiece.
For workpieces with very low surface hardness, "snowflake dry ice" can be used as a raw material to spray the surface of the workpiece. The main factor that damages the workpiece is wind pressure, so for fragile parts, sample experiments should be carried out first, and the appropriate wind pressure should be adjusted before cleaning.
2. Where objects go after dry ice cleaning
Dry ice cleaning causes objects to freeze quickly, forming cracks. When dry ice expands in the cracks, it explodes instantly, turning the objects into particles, which are blown away by compressed air and spread in the air. Of course, after cleaning, if there are no other measures, these particles spread in the air will settle on the cleaned ground like dust, and the dust can be removed by vacuuming.
Under certain conditions, some oil or water stains may appear on the site. This is because there are some floating residual oil or water in the workpiece being cleaned. These residual oil or water are not attached to the surface of the workpiece but are free. In actual operation, the residual oil in the workpiece should be absorbed with a cloth before cleaning the workpiece with dry ice.