Wetblasting

Definition

Wet blasting, also known as wet sandblasting, is a surface treatment process in which a water-sand mixture is sprayed onto the workpiece under high pressure. This process removes impurities, rust, and old coatings to create a clean and rough surface. Wet blasting is often used to activate the surface, ensuring good adhesion of subsequent coatings to the workpiece. Unlike dry sandblasting, wet blasting does not generate dust and is gentler on the material being treated.

Process

The wet blasting process works as follows: A mixture of water and abrasive media is sprayed onto the workpiece through a blasting gun using a compressed air jet. The water envelops each abrasive particle, resulting in a gentle treatment of the material. By controlling the proportions of abrasive media, water, and air, the outcome of the blasting process can be adjusted. For our wet blasting process, we use corundum abrasive media F400 with a particle size between 8 and 32 µm. This allows for surfaces to be blasted with a roughness of up to Ra 0.2 without altering it. This is particularly important when preserving the surface condition is desired, for example, if the workpieces have been previously ground.

Advantages: 

• Homogeneous surface with a uniform matte gray finish.
• The blasting process is extremely gentle, causing minimal material removal (significantly below 1 µm).
• Preservation of surface roughness up to Ra 0.2 without alteration.

Materials

• All metals

Specifications: 

The information required for this process includes:

• Information about the materials to be processed.
• A workpiece drawing, if available.