Derusting.
The Must-Do Solution to Prevent Workpiece Degradation
It is the unwelcome companion of every metal workpiece: When rust forms on metal parts due to the effects of water and oxygen, it must be professionally removed. Failure to do so can lead to serious damage to the surface, such as pitting corrosion. With mechanical rust removal methods, there is a risk of removing too much material and failing to reach hard-to-access rusted areas. For this reason, chemical immersion cleaning and rust removal is always the more efficient and gentler option for the workpiece. This process can be further enhanced by the use of ultrasound.
Procedure#.
High pressure cleaning
Did you know that stubborn component contamination or workpiece coatings can be removed using the high-pressure water process – without the addition of any chemical additives? PURIMA cleaning systems with high water pressure are not only powerful, but also environmentally friendly. With pressures of up to 4000 bar, the cleaning material is treated powerfully and in a focused manner or over a wide area on the desired contours or surfaces, completely without chemical additives. Our large-area cleaning with patented special tools and integrated suction technology opens up a wide range of application possibilities. Depending on the requirements, our high-pressure technology is used both for cleaning individual parts and in our continuous flow systems. From decontamination to deburring and decoating, many applications are possible: paints, resins, release agents, ceramic coatings and radioactivity are professionally removed using high-pressure technology
Spray cleaning
Adhering oils and greases from production processes or incrustations and dried production residues on components are typical requirements for the spray cleaning process step. The aqueous cleaning medium is sprayed at low pressure specifically onto the surface to be cleaned by means of a nozzle. This can be done from all directions. The impurities are either directly detached by the mechanical energy and flushed away or softened to be completely removed in the following cleaning step. Either the component or the nozzle is set in motion to ensure uniform impingement. If particularly high purity requirements have to be met, the spray process is suitable as the final fine cleaning stage in industrial cleaning plants. Any remaining particles are thus removed 100 percent from the surface. removed from the surface.
Immersion cleaning
The cleaning of components in an immersion bath is one of the classic applications in the field of industrial parts cleaning. For immersion cleaning, the items to be cleaned are immersed in an aqueous alkaline or acidic cleaning solution and treated there for a defined time. Here, too, the dissolution of contamination can be improved by component movement: rotation or oscillation in the baths ensures uniform distribution of the cleaning medium. The efficiency of immersion degreasing can also be increased by raising the basin temperature. The time factor also depends on the degree of soiling of the components to be cleaned. The process is simple, economical and gentle on sensitive surfaces. Immersion cleaning is usually combined with the mechanical support of ultrasound and pressure flooding in our plants.
Ultrasonic cleaning
Cleaning with the right vibration: In ultrasonic cleaning, components are subjected to vibrations between 20 and 130 kHz. These are generated in oscillating elements on the sides of the pool or on the bottom of the pool. The effect of ultrasound in the liquid is high tensile and compressive forces, which create vacuum bubbles. The subsequent implosion of the vacuum bubbles produces a very high mechanical effect on the component surface. Due to uniform propagation of the sound in the cleaning medium, full accessibility of the component surface and thus excellent cleaning is ensured. Dirt particles adhering to the surface are detached in this way without attacking or abrading the material itself. Cavitation occurs on all surfaces that are covered with liquid. Ultrasonic cleaning is optimized by rotation, oscillation and pressure flooding of the components. The ultrasonic cleaning process is ideal for reaching geometrically complex parts with narrow joints or blind holes where other cleaning methods have little or no effect. In addition, the sonic frequency can be variably adjusted, so that coarse cleaning through to fine cleaning is possible with this process.
Pressure flooding
Contamination with chips and oils can be found on workpieces directly after mechanical processing. In most cases, these must be removed before the next machining step. Pressure flooding is often combined with ultrasound in installations. Nozzles are arranged in the process basin in specific relation to the workpiece. Optimal mechanical cleaning effect can be achieved by using ultrasound and pressure flooding alternately. At the end of each cleaning process, depending on the requirements of the process and the desired results, drying and preservation can be easily integrated in our systems.
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