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In cold spraying, the kinetic energy (particle velocity) is increased and the thermal energy reduced. In this way it is possible to produce spray coatings which are virtually free of oxides.
Laboratory investigations show that cold spray coating have extremely high bond strengths and are exceptionally dense. In cold spray processes the powder requires a temperature of only a few hundred degrees. Coated substrates reveal no material changes due to thermal influence.
Applications are still being developed. Current uses are found in the automobile industry, anti-corrosion protections and electronics, for example.
Supply System for Cold Spray Applications, DESY® 300/100
In this system, the nitrogen is compressed up to 4000psi (275 bar) in the liquid state. After the DESY® 300/100, the liquid nitrogen is evaporated in a high pressure evaporator.
For pressure requirements over 4000psi, an additional booster operated with very low energy consumption can be used.
Main advantages of the system are:
- Very low energy requirements due to cost-effective liquid compression
- The DESY® 300/100 pumps exactly the quantity of nitrogen which is required by the user, even when strong fluctuations in demand occur
- Unchangingly high quality of the injection moulded parts because of the very pure and oil-free nitrogen
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