Wet sandblasting

The technology of wet sandblasting essentially includes the use of water as a component or vehicle to transport the particles of the abrasive against the surface to be treated, eliminating the formation of dust that is created during impact.

There are essentially three types.  If used on iron surfaces, these systems immediately determine the start of oxidation, and it is therefore advisable to apply a passivation or phosphoric product to inhibit the start of oxidation on the surface. 

 

Hydro blasting

Hydro sandblasting in practice uses a pressure washer as a base where a Venturi system is attached to the point where the water exits, that releases the abrasive from a container.  Essentially, air (the transport vehicle for the abrasive in dry sandblasting) is replaced with water.  This system is able to eliminate dust, although to the detriment of the following:


The only advantage of a water sandblaster is the possibility of working without needing to have compressed air available.

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Sandblaster with a humidification device

Sandblasting with a humidification device uses a dry sandblaster as a base, where water is combined outside the air/abrasive mix after it comes out of the nozzle.  This system is very economic, maintains the performance of the dry sandblaster, and uses small quantities of water, but the results of reducing dust are often not optimal. This is because normally water taken directly from a water line (in pipes as long as 20-40 m that often run vertical) does not maintain the necessary capacity to obtain the desired result.  Additionally, the flow of water is not halted and stopped when the sandblaster is stopped.
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Aerohydro sandblasting

Aerohydro sandblasting is the most recent and innovative technology:  we can see its operating principle in detail in the illustrations in the modular sandblaster catalog. This system uses a dry modular sandblaster as a base where the water is injected into a chamber before the sandblaster's nozzle.In this way, the outgoing flow is a homogeneous mix composed of air/water/abrasive.  To work with an aerohydro sandblaster, it is necessary to use a modular sandblaster along with a humidifier kit  (more expensive than the other two systems) that can obtain the same results as dry sandblasting with the dust reducing effect of a hydro sandblaster.

The water supply is independent from the line pressure, therefore guaranteeing the necessary capacity, and the flow of the water is controlled by the sandblaster's start and stop system.


accumulation of water during work inside buildings.

Using powder abrasives, it can happen that some of these abrasives remains on the surface. For this reason, modular sandblasters feature a remote control on its handle that allows the user to stop the flow of the abrasive. In this way, every 4-5 m² the user can  conveniently wash the already sanded area with an air and water jet, and move forward with sandblasting restoring the flow of the abrasive via remote control.

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