Interior and exterior coating of highly strained parts

By definitely structuring the TOPOCROM® layers (definition and specification of thickness of layer and surface structure) considerable improvements can be achieved. Practical examples:
  • Interior coating of pipes for transporting concrete
  • Interior coating of moulds for the transport of fluid steel
  • Coating of male and female dies and forming tools
  • Coating of highly strained parts in the chemical industry
Tools with partial TOPOCROM® coating.

Interior coating of transport pipes

Transport pipes for concrete, sand, gravel or mixture are subject to a high degree of abrasion. TOPOCROM® interior coating significantly increases service life and provides good gliding properties. Compared to conventionally electroplated or hardened pipes, TOPOCROM® coatings provide considerably longer service life. In operation, measurable benefits and advantages have been proven:
  • Higher system availability
  • Low maintenance costs
  • Distinctly better corrosion and abrasion resistance compared to hardened or differently coated pipes

Areas of applications

  • Transport pipes for concrete pumps and slurry pumps
  • Pipes in the chemical and petroleum industries
  • Pipework installations in sewage treatment plants
  • Transport pipes for waste disposal

Selected characteristics of the TOPOCROM® surface

  • Layer thickness inside a pipe up to 500 µm
  • Adjustable topography
  • Multiple layer structure
  • Optimum hardness, adapted ductility
  • Precisely adjusted number of cracks
Multi-layer interior coating of transport pipes for concrete are used throughout Europe.

Interior coating of continuous casting moulds

The mould is subject to high temperatures, pressures and abrasion effects due to the flow of fluid steel. Coating with TOPOCROM® guarantees longer service life. It is remarkable that the layer thickness over the entire cross section and also in the radius is exactly defined, and the layer thickness during the coating process can be constantly maintained.

TOPOCROM® interior coating increase life time

The tubular mould is extremely stressed by the continuous flow of the fluid steel from the blast furnace or electrical furnace. The high temperature results in particularly extreme abrasion. The resistance of the TOPOCROM® structure to this abrasion mechanism is however very high. The interior coating of the moulds with TOPOCROM® highly increases the service life. The experiences of steelworks show a double or triple service life.
Multi-layer TOPOCROM® interior coating of in continuous casting moulds made of copper. The flow of fluid steel makes special demands on the abrasion resistance of the coating. This technology is used in various steel plants.

Application overview

Interior coating of pipes and cylinders: For conveying media such as concrete, sewage sludge, liquid steel, oil, waste products and viscous media. Practical examples: Moulds, transport cylinders for high consistancy, pipes. For the hydraulic industry: Hydraulic cylinders, hydraulic pistons, rods, tie rods, hydraulic pipes

Coating of forming tools

Coating of forming tools with TOPOCROM® considerably extends their service life. The reduction of friction helps achieve good metal forming behaviour.

Improved frictional coefficient thanks to the TOPOCROM® surface

The special feature of this coating system: A hemispherical structure forms on the coated surface. This surface demonstrates major advantages during sheet metal forming. The adhesion between tool and sheet metal is reduced, adhesion and welding effects are avoided.
TOPOCROM® coated male and female dies with the resulting shaped Part.

The surface can carry lubricants

The cavities between the "semi-hemispheres" allow lubricant pockets with a hydrostatic effect to be formed. The TOPOCROM® surface ensures constant wettability with lubricant.

Exact reproducibility of the defined surface

The TOPOCROM® coating is generated in an industrially proven process. The forming tools are coated in closed reactors. The computer-supported system control ensures an exact reproducibility of the desired properties of the layer.
  • Advantages in sheet metal forming
  • Longer service life
  • Better gliding properties
  • Avoidance of tears and cold welding effects

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