Soda blasting is specialty blasting process that is ideal for applications where damage to the surface is unacceptable. This process was originally developed for blasting the Statue of Liberty. Soda (or baking soda or sodium bicarbonate) blasting is a versatile process used to remove paint, oils/grease, rust, paint and other surface contaminants. Soda will not damage glass or create heat during the blasting process and cause warping of thin metals. If desired and local regulations allow, soda can be washed away after blasting due to it’s water solubility.
Since soda is hydroscopic (a ‘love’ for water) it will have a tendency to clump and flow improperly. To minimize this issue, special equipment is required that is dedicated for soda blasting. Also, specialty soda formulas for blasting (not the standard stuff in your refrigerator) have been developed to improve the media flow properties.
Unlike other dry abrasive blast media, if the surface being blasted is sensitive to chemicals or the surface will be coated after the blasting a rinse with water or a water/vinegar solution will be required to neutralize the soda.