Corrosion, iron, water, air – they are all elements that relate to each other and are well known to everybody. The water in the air at a high relative humidity is sufficient for a corrosion process to take place.

The limit lies at 45-50 %RH: if the humidity lies under that value you may store glittering steel without risk of corrosion. If the atmospheric humidity lies above 60% the corrosion process will set in. From 60 to 100 %RH the corrosion process will be importantly accelerated. In case of free water on the surface a corrosion process will start very quickly.

This means that by keeping a constant, low atmospheric humidity you will be able to protect iron/steel against corrosion, if the material is stored in a hall – a dry air storage room. This can be done by means of dehumidification, in as much as the corrosion does not depend on the temperature of the room (no need for heating). Consequently, further surface treatment of the materials is not necessary.

Dry air storage is very common for the protection of iron/steel as well as of many other types of materials.

Major machinery with large internal surface may be protected from internal corrosion when not in operation. As examples can be mentioned sugar refineries, where the machines are operating only for some months a year during "the Campaign", power plants where the boilers, turbines, and condenser are periodically out of operation, heating stations having a varied need for supply of heat during summer-/wintertime.

Application examples

• Bridge constructions
• Military aircrafts and tanks
• Containers and vessels
• Windmill towers
• Power stations
• Heating stations
• Sugar refineries
• Dry air storage
• Garages and hangars
• Sugar refineries
• Boilers
• Turbines
• Condensers