KOKS, your partner for high-pressure derusting
High‑pressure derusting is an effective way to remove rust and oxidation from metal surfaces using high‑pressure water jetting. You can use it as a standalone cleaning step, for example to make steel clean and ready for inspection, but also to technically prepare a surface for follow‑up work. With KOKS high‑pressure solutions and the right accessories, you can derust steel structures, tanks, ship parts and installations in a controlled way, without grit and often without chemicals.
Contact us for personalised advice, or read on for more information about this application.
What is high-pressure derusting?
High‑pressure derusting is the removal of rust and oxidation using water that is fed through a high‑pressure hose to a high‑pressure gun and spray head, and exits through a nozzle as a narrow jet. When the jet hits the rusted surface, the direct impact causes the rust layer to crack and detach. Water also penetrates small cracks and edges in the rust, lifting loose parts more quickly and rinsing them away immediately. The jet does not cut through the base metal, because rust is much weaker than the substrate and the effect mainly takes place in the rust layer. Pressure, flow rate, jet pattern, angle, stand‑off distance and travel speed determine how intensive the derusting process is.
Why derust with high pressure?
High‑pressure derusting is an effective method when you want to remove rust and oxidation quickly and prepare the surface for further work. Because you work with water instead of grit, no blasting media remains on or in the surface. This typically reduces clean‑up and helps prevent blasting residues from being left behind.
In addition, high‑pressure derusting can remove contamination that often comes with rust, such as salts and baked‑on deposits, in the same step. This makes the surface not only visually clean, but also easier to assess for inspection or repair. In many cases, it also results in less dust formation and fewer waste streams than traditional blasting methods, because no blasting media needs to be brought in and taken away.
Where is high-pressure roughening applied?
High‑pressure roughening is used on various substrates such as concrete, metal, (natural) stone and grating. Depending on the goal, surface preparation or improving grip, the method is applied to both large areas and specific zones where extra structure or slip resistance is needed.
- Industry and maintenance: steel structures, installations, tank surfaces, machine frames and work floors
- Work areas and walkways: platforms, grating, stairs, walkways and floor zones where extra grip is required
- Civil engineering and infrastructure: bridge decks, viaducts, parking garages, concrete floors and tunnel walls
- Renovation and construction: concrete walls and floors as preparation for repair, finishing or new layers, including façade and panel elements
- Maritime and offshore: deck sections, platforms and walkways as preparation for preservation work or grip improvement
- Logistics and industrial environments: loading bays, platforms, warehouse floors and zones with increased slip risk, such as wet or contaminated areas
Buying or renting high-pressure derusting solutions from KOKS Group
For high‑pressure derusting, KOKS Group offers a complete package of high‑pressure solutions to remove rust and restore your asset to a good condition. You can come to us for both one‑off deployment and long‑term use, with options to buy or rent.
With KOKS you benefit from:
- A broad range of high‑pressure units and accessories up to 3,000 bar, suitable for derusting on steel structures, installations and maritime assets
- Tailored advice on pressure, flow rate and tooling, matched to corrosion level, accessibility and the required end condition
- The option to buy or rent, so you can choose the right solution for both projects and ongoing use
- Support in assembling a complete setup, including suitable accessories and safety equipment for high‑pressure work (such as TST Sweden PPE), so you can work safely and efficiently
High-pressure units up to 3,000 bar for derusting
For high‑pressure derusting, KOKS supplies Hammelmann high‑pressure units up to 3,000 bar suitable for removing rust and oxidation, both as a stand‑alone step and as preparation for corrosion protection or (re)coating. The advantage of derusting with water is that you work without blasting media and the result remains well controlled, even on larger surfaces or complex shapes. The selected unit must not only deliver the required pressure, but also remain stable and practical to deploy in the environment where you are working, for example in industry, infrastructure or maritime maintenance.
KOKS advises which unit configuration best matches the corrosion level, accessibility and the required end condition. We then align the combination of accessories and settings so you derust efficiently and the surface is ready for inspection, repair or a new coating layer.
Accessories for derusting: guns, rotating heads and surface tools
For high‑pressure derusting, the choice of tools makes the difference in speed and results. As a dealer, KOKS supplies Hammelmann accessories that can be used specifically for derusting and surface preparation. Examples include Aquablast surface cleaners for fixed working widths on larger areas, hand‑operated floor cleaners for uniform and efficient work, and high‑pressure guns that you can configure with various accessories for day‑to‑day derusting.
For larger areas, Spiderjets are also available: robotic cleaning systems that attach themselves to the surface and are easy to guide, enabling fast and consistent derusting. This also makes Spiderjets suitable for large (vertical) surfaces such as ship hulls, where controlled, repeatable work is required.
Assembling the right setup for high‑pressure derusting
You achieve the best result in high‑pressure derusting when the complete setup is properly matched. The right combination of unit, pressure, flow rate and tooling determines whether you remove rust effectively and leave the surface clean and easy to assess, for example for inspection, maintenance or repair work. Our specialists actively think along with you and, if desired, determine the optimal configuration based on the substrate, corrosion level, accessibility and the required end result. This enables efficient, safe and repeatable work.
Contact us for personal advise
Would you like to know more about high‑pressure derusting, request a quote for rental or purchase, or find out which approach best fits your situation? Feel free to contact the KOKS specialists for no‑obligation advice. We’re happy to think along with you and can also arrange a demonstration if desired, so you can see what result is achievable.