The major difference between sodablasting and sandblasting is the abrasive media used and the applications. But there is a lot more than just this. This article has more details.
Did You Know?
The Statue of Liberty was renovated in the 1980s by using the sodablasting process to reduce chances of damage, to both, the monument and the environment.
On any painted surface, there are two parts; the substrate at the bottom and the coating on top. The coating may be a paint layer, dust, grease, or some other impurity. To remove contaminants stuck in the coating or to clean a surface for painting, a process called abrasive blasting needs to be undertaken. Abrasive blasting is a process in which a high-pressure jet of abrasive particles is focused on a surface for various reasons, like making a rough surface smooth, making a smooth surface rough, etc. When we compare sodablasting vs sandblasting, the abrasive media used, equipment and advantages, all have to be considered.
Sodablasting vs. Sandblasting
Sodablasting uses a high-speed stream of sodium bicarbonate particles to hit the required surface. Soda particles are soft, but when propelled by compressed air, they hit a surface at a high speed, and break into fragments, releasing energy which knocks out the contaminants or paint particles right off the surface, without damaging the substrate.
Sandblasting is a process in which an abrasive media is ejected at high pressure and volume on to a surface due to compressed air pressure. The traditional abrasive used is sand, but any uniform-sized media is usable, including copper slags, pumice, powdered abrasives, steel particles, and even organic media, like corncob, walnut shell pieces, and coconut shell fragments. The process may leave etch marks on the metal surface, and is unsuitable for softer substrates.
Sodablasting is a single-step process that involves no prior surface cleaning, and no complex chemical cleanup, post-operation. It can be carried out even by a single operator with minimum equipment.
Sandblasting is carried out in four distinct stages. The first stage is to decide which equipment and media should be used, and a media quality check. The next stage involves a cleanup of the surface prior to sandblasting and surrounding surface protection. In the third step, the actual operation is carried out by the operator using eye protection and respiratory safeguards in a sandblasting enclosure. The last step is the cleanup operation. It is a good idea to keep a large plastic sheet below the workplace and cover the area with a tarpaulin, so that the abrasive sand can be collected, post-operation.
The equipment used for sodablasting is called sodablaster. It includes a storage chamber for granular sodium bicarbonate, a compressed air chamber, a blast chamber, a decontamination system to remove humidity, a blast hose and a nozzle. Some systems allow the user to vary the rate of flow of sodium bicarbonate.
The equipment used for sandblasting is called a sandblaster. It is made up of a compressed air chamber, a chamber containing sand, a hose and a gun. When the gun is fired, the air escapes, creating a vacuum, due to which the sand particles are ejected out with pressure. There are several other types of sandblasters, like gravity blasters that use principle of gravity, and pressure blasters which operate like an aerosol can.
|Pros of Sodablasting
|Pros of Sandblasting
|Cons of Sodablasting
|Cons of Sandblasting
The bottom line is, sodablasting, being a more recent technique, is suited for delicate operations in which the risk of damage to substrate is higher. Sandblasting, on the other hand, is intended for traditional, heavy-duty operations that can withstand the rigors of the process.