Sandblasting: How Dehumidifiers Prevent Corrosion

A lot of people in Australia have experienced how humidity can sky rocket with warmer weather. The air becomes hot and muggy, your sweat is not able to evaporate and ends up sticking to your skin. It is okay if you are hanging out on the beach with a long, cold drink in hand, but humidity is not good if you want to keep things dry. Particularly, if you want to avoid substrate surface corrosion during and immediately after abrasive blasting.

A method sometimes used to reduce relative humidity while abrasive blasting is to heat the surrounding air. While this reduces relative humidity (RH), it does not actually remove any water or reduce the water content of the air. In fact, heating air will enable it to hold more water before saturation. Dehumidification, on the other hand, effectively reduces the moisture content of the air, providing a better solution.

Using a dehumidifier to introduce dehumidified air into your sandblasting booth will significantly reduce RH, which will, in turn, decrease the risk of ‘flash rusting’. Reducing humidity to below 50% RH will also allow you to ‘hold the blast’ on uncoated steel for days. Obviously the need to immediately clean and paint after every blast can be reduced with the use of a dehumidifier, which means you can keep blasting for longer and meet production targets more quickly.

Humiscope, which is Austrlia wide, has the answer to your sandblasting corrosion dilemma. Humiscope has dehumidifiers for commercial and industrial applications available for rental or purchase. If you are new to the benefits of dehumidification, get in touch with one of our friendly staff members. They are happy to offer help and advice on the right dehumidifier for your project.