Two most common ways of removing unwanted paint, rust, grease, graffiti, dirt and oil form many surfaces are often from sandblasting or now most commonly soda blasting. In using either one of these techniques to get the proper out come without causing any damage you need to know how these two techniques work.
In this technique different media like sand, glass beads, plastic beads, or some other medium is shot at high speed unto the surface. This is also called as abrasive media. The kind of material used to blasting the surface depends on the type of surfaces and on how difficult the removal is. That’s why this technique is better for brick cleaning rather than glass cleaning. If you are not sure about the withstand ability of the surface in question then it’s better to stick with media like Walnut shells and Pumice which are soft materials. Glass beads would be the next step. This gives a soft and bright finish to the surface. Aluminum oxide is another media for used here. This is a gentler medium used in this technique and it is long lasting. But the disadvantage of this is disadvantage here you must be careful in disposing of the material after it is used. The newest form of method here is using compact dry ice pellets.
The environmental concerns in this are rather high. For example in using walnut shells leaves a lot of waste which needs to be taken care of. All the techniques here have environmental concerns attached to it which is major disadvantage of sand blasting. Besides this the other major concern form this technique is that it generates a significant amount of heat which is why it can’t be used on soft metals and fiberglass. This is the reason to why sad ablating is now becoming more popular.
This is used for hard materials like when brick cleaning and it can also be used for more fragile materials like glass and soft metals. Unlike the traditional methods in this technique there is no warping or etching. This is actually a good replacement for steel, aluminum, plastic and fiberglass. As an added advantage this doesn’t leave any waste that can be of any harm to the environment since the sodium bicarbonate can easily dissolve in water. This automatically cuts off the cleanup time afterwards and also the time taken is also less. Here the soda strips off the paint and the end result it leaves a smooth texture-free finish to the surface. This method is more suitable for soft types of materials since its more gentle procedure. Soda-Tec offers this technique as part of their services.
Do to these reasons soda blasting is the best technique out of the two. But however, soda cannot perform heavy cleaning like removing heavy rust, corrosion. This media is just not strong enough to lift away them away. In such cases aluminum oxide and glass bead are the right choice of abrasive blasting. So it’s important to evaluate the surface materials and the type of the cleaning that needs to be done before deciding what type of technique should be used.