Surfaces treatment with dry steam: among its properties, steam is also a very good medium for chemical products that have to be applied on surfaces, e. g. treatments like passivation and phosphating.
Dry and saturated steam are thoroughly used in surfaces treatment before applying paint and for protective treatments as well .
Phosphatation is a chemical process through which the surface is covered with a protective crystalline layer. It improves the resistance to corrosion as well as paint aderance .
Saturated steam, while being very effective in cleaning and degreasing items, is also an optimal medium for phosphating/passivating products.
This means that, with a single operation, the surface is then ready to receive painting.
The standard phosphatation cycle (being it sprayed or bathed) proceeds as follows:
- Predegreasing – degreasing – washing – activation – phosphatation – washing – passivation – washing – rinsing – desiccation.
- Ten operations, lasting a total of 30 minutes, that consume a lot of water (which has to be properly eliminated) and energy (for heating the water).
- Drying phase at 140C, slow and costly energy-wise.
The REA procedure allows the entire cycle to be executed in a single operation. Every REA generator has also a phosphating variant, with an extra tank for the product and specific stainless steel accessories.
The cleaning/surface treatment process with dry steam is very simple :
1- cleaning / degreasing with steam or steam + detergent if necessary
2- steam + phosphating or passivating products
3- steam only for rinsing if necessary and drying
The operator will easily select each of these 3 operations with the digital handle , without loss of time .