How do you use the knowledge about dirt adhesion when cleaning?

The goal of cleaning is to break the bonds between dirt and surface. Mechanical, thermal and chemical factors are used for high-pressure cleaning.


The effect of the high-pressure cleaner is influenced by the four influencing variables: delivery rate, pump pressure, spray distance and spray angle. What is important here is the impact pressure, i.e. the impact force of the water jet per unit area to be cleaned. He depends on praying distance: A distance of 10 to 30 cm is recommended because the pressure drops quickly the further away you are.

Spray angle: The angle should be chosen according to the degree of contamination

. Stubborn dirt requires an angle of 0-25°, medium dirt of 25-50° and light dirt an angle of 50-80°. Nozzle pressure: Depending on the water volume and nozzle cross-section, a higher Caloundra presure washing only offers a disproportionately low increase in impact pressure. Amount of water: With the increase in the amount, a rapid increase in the impact pressure can be achieved. This also makes it easier to remove the dirt, since there is less atomization even at greater distances.


Chemical processes are accelerated by adding heat, for example fats and oils can be dissolved more quickly. The post-drying time is also reduced by the heated cleaning object. In this way, better results and up to 40% shorter cleaning times can be achieved.


If increasing the impact pressure or temperature does not produce satisfactory results, the use of chemical cleaning agents will be necessary. These have a positive effect on increasing the wetting ability, emulsification or direct chemical reactions with the dirt particles.

The suitability of the cleaning agents depends on their pH value and the surface to be treated.

 Acidic agents with a pH value of 0-6 are used for lime deposits, urine scale, rust or other oxides, while alkaline ones with a pH value of 8.5 to 14 are used for oils, fats, tar and soot. Neutral cleaners are the right choice for sensitive surfaces that are lightly soiled with oil or grease. However, extremely acidic or alkaline values ​​can lead to damage to the high-pressure cleaner or the object or even violate the Wastewater Act. Chemical cleaning agents can also cause damage if the exposure times are too long. In general, an extension of the exposure time only makes sense up to a certain length of time, since the cleaning intensity approaches a limit value with increasing duration.

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