Enduroq 3000/3200: Welded overlay surface technology

Marginal Column

The Enduroq 3000 series. based on the Plasma Transferred Arc welding process, are specifically suited to situations where the chance of mechanical impact is higher and more on-site repairs are required. The dual layer technology, Enduroq 3200, meets and exceeds the highest industry standards.

Overlay Welding

Overlay welding has been introduced in specific offshore applications where large piston rods are exposed to splash zones and highly dynamic mechanical loads. The exceptionally severe application circumstances in deep water offshore drilling require surface technology properties outside the conventional galvanic or thermal sprayed technologies can provide.Rexroth uses the Plasma Transferred Arc (PTA) process to apply a cobalt based alloy (Ultimet) onto a steel rod. With the in-house production of the overlay welding surface technology, piston rods with a rod diameter of up to 600 mm can be equipped with the welded overlay. Two welding heads manage the welded overlay on the piston rods. All hydraulic cylinders can be equipped with PTA surface technology. These are referred to as Enduroq 3000 single layer and Enduroq 3200 dual layer.

Enduroq 3000

The Enduroq 3000 is a single layer surface technology. Its characteristics combine for optimal cylinder functionality in high corrosion industries. Especially in extreme environments, like that of the offshore industry, the Enduroq 3000 series is an excellent solution. The unique corrosion protected surface technology with no porosity and zero permeability guarantees long lasting surface protection. Since the first pilot projects in 2005, and the first industrial installation in 2006, results have been highly positive and total cost of ownership is significantly declining due to the possibility of specialized on site repairs.

Enduroq 3200

To protect piston rods against corrosion under the most severe (under water) circumstances, Enduroq 3200 is a perfect solution. Easy field repairs can be carried out for the Enduroq 3200 as well as for the Enduroq 3000, giving the advantage of increased uptime and cost reductions.

Laser cleaning

The surface is treated with a laser cleaning process in order to create optimum steel surface properties for Bosch Rexroth's welding processes, along with ensuring a spotless surface. Removing all dirt and oxidal layers is made possible by using the latest technology and excluding the human factor. this enables Rexroth to enforce maximization of its quality standards throughout the production process. The result: The highest quality products

Customer benefits

  • Extreme corrosion protection
  • No porosity
  • Zero permeability
  • High ductility
  • Highest quality standards
  • Longer lifetimes
  • Minimum downtime
  • Easy field repair