Discover why dehumidification is critical for successful abrasive blasting!
Without dehumidification during the blasting and coating process, corrosion can occur on exposed surfaces before a protective coating is applied, leading to significant operational challenges. If a blasted surface remains exposed for too long, ‘flash rust’ can develop, making the surface unsuitable for coating within just two hours.
1. Moisture Control
Moisture in the blasting environment can lead to surface contamination, flash rusting and reduced coating adhesion. By removing the excess moisture, dehumidification creates a drier environment for blasting, resulting in better surface preparation and coating application.
2. Clogged sand, sand clumping during blasting
In pneumatic sandblasting machines, the compressed air often contains moisture. The higher the humidity in the environment, the more moisture will accumulate in the sand tank. When this moisture mixes with the sand in the tank, it causes the sand to clump. Clumped sand can quickly clog the nozzle. To address this issue, it is necessary to disconnect and thoroughly clean the air supply line. Additionally, a moisture separator can be used to filter the air before it is supplied to the sandblasting machine.
3. Minimized corrosion risk
Moisture in the blasting environment can contribute to the corrosion of metal surfaces, particularly after abrasive blasting when the surface is left exposed. Dehumidification reduces the relative humidity, lowering the risk of corrosion and allowing for longer-term surface protection.
4. Coating application benefits
Moisture in the air can negatively impact coating drying times, cause uneven film formation, or lead to coating failures. By dehumidifying the area, you can ensure consistent and proper adhesion, curing, and longevity of the applied coating.
Incorporating dehumidification into your abrasive blasting process is essential to ensure optimal surface preparation, prevent flash rust, and achieve long-lasting coating performance. By controlling moisture levels, you protect surfaces from premature corrosion and ensure proper coating adhesion, resulting in more reliable and durable outcomes.
Where to buy or rent a Dehumidifier?
Air Cooled Dehumidifiers are crucial in controlling humidity, mold, and mildew in both commercial and industrial spaces. They are especially valuable in environments where moisture management, ventilation, and air temperature are challenging to control.
In industrial applications, dehumidifiers are used in factories and plants to reduce moisture, improving indoor air quality in working spaces. Some key applications include:
- Surface treatment during internal blasting and painting of tanks
- Shipping industry, both for permanent and temporary applications
- Controlling humidity levels in production processes
- Protection of equipment sensitive to corrosion
- Improving climate conditions in damp areas
For premium Air-Cooled Dehumidifiers designed to meet your industrial needs, reach out to Viva-Techs today. Find detailed product information HERE.