Derust removal with high-pressure water not only a gentle ultra-high-pressure application, but an effective and environmentally friendly solution

Derust removal with high-pressure water is a fast and cost-effective method to remove rust from smooth surfaces and substrates. The use of ultra-high pressure (UHP) waterjet equipment, along with the development of new equipment, has greatly increased over the years. One of the main reasons is that water jetting is a dust-free blasting process with very few side effects on the environment. Thus, water jetting does not necessarily interfere with dust-sensitive work at the same time. The use of water jetting also has the ecological advantage of eliminating the need to collect and dispose of abrasives.

Mood picture for fust removal. It is a picture of a rusty surface

Advantages of derusting with high-pressure water

  • no damage to the original substrate profile
  • improved cleanliness of the substrate surface, as there are no grinding residues
  • significant cost savings
  • fewer health problems due to the elimination of pollutants in the air
  • can be used on various materials and surfaces
  • low noise level
  • up to 20 % better paint adhesion due to clean and uniform surface

Enormous rust removal capacity in a dry dock through high-pressure nozzles with guns and rotating nozzles

Dry docks must undergo regular paint and rust removal procedures and their protective coatings must be reapplied. The prerequisite for the reliable adhesion of new primer and protective paint coating is a surface free from rust, oil, grease and other contamination. To achieve this, high-pressure pump systems are employed to provide water for blasting with 2,000 bar and maximum-pressure water jets with 2,200 bar.

At a dry dock in the northern Italian location of La Spezia on the Mediterranean, KAMAT high-pressure systems were used for rust-removal. So that the new application of the protective coating could offer long-term security, a WJ-2 surface quality was required after the high-pressure shot-blasting. This was achieved using two pump units in combination with KAMAT pumps of type K9018-3GA. With a performance of 25 liters per minute, the pumps generate a pressure of 1,200 bar. Work was carried out using KSP 1200 guns and attached KAMAT rotating nozzles of type 1500. This combination made it possible to remove the rust from the dry dock, to the required surface finish, at a rate of 30 to 40 square meters per hour.

Related Links to Rust Removal
Hochdruckpumpen zur hydrostatischen Druckprüfung
KAMAT Icon für Hochdruckpumpen, hier K4500-3G
High-Pressure Pumps
High-Pressure Guns
KAMAT High-Pressure Roto-Lance with the max. of 3000 bar, showing the handle and connections
High-Pressure Lances
Back view of the green container with the KAMAT High-Pressure Unit K40036a-3G-dw530b
Pump Units