BlastOne

Steel Fabrication

Why we Blast?

Abrasive blasting is used heavily in the steel fabrication industry for removing milscale prior to fabrication, as it makes welding cleaner and easier. We also abrasive blast to clean the steel surface after fabrication to allow for weld inspection, as well as rust oil and milscale removal.
Corrosion is defined as "the degradation of materials by chemical reaction with the environment in which the material resides." this is because of metal oxidation. As metals have a tendency to return to their natural state, it is a natural process which produces either salt or oxides. It requires four elements - anode, cathode, an electrolyte, and a metallic path. Ultimately we are preparing the surface to ensure we have proper adherence of the coating system which is to protect the structure from Corrosion

WHAT ARE THE TYPICAL TYPES OF ABRASIVE USED?

The most common abrasives used are Alluvial GMA Garnet and Steel Grit for air blasting Applications. In Airless wheel blasting machines you will normally use steel shot which recycles well.

Choosing the right abrasive is critical to getting good surface preparation as 85% of all coating failures can be attributed to improper surface preparation.

Basic Equipment Requirements

Blasting Equipment

The best equipment to use depends heavily on the part size and quantity of your demand. For smaller shops, doing smaller pieces, air blasting with a small pot is perfectly adequate. Higher demand, or large pieces may benefit from some form of automation in the form of robotic air blasting or a centrifugal wheel blast machine.

Painting Equipment

If zinc laden primers are to being sprayed, a convention pot or diaphragm pump are recommended to be used, as there are less moving parts for the very abrasive zinc particulate to wear. Most Top coating paints are sprayed with an Airless Sprayer like the Graco NXT X60.

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