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Structured surfaces for any demand

TOPOCROM® is a technology for producing structured TOPOCROM®-layers in a continuous single process step (reactor coating). Individually adjustable surface topographies are available according to the demands of the customers.
Schematic illustration of a TOPOCROM®-coating. The distinctive hemispherical surface structure shows resp. enables different characteristics in industrial processes.

Surface topography and multi-layer system

Depending on the demands and the base material the multi-layer system is chosen. The surface topography is selected individually and specifically according to the intended application (e.g. abrasion-resistance, embossing property of skin-pass rolls, grip effects of feeder rolls). It is possible to generate open or closed structures, high or low roughness values.

To achieve the desired features of the surface we proceed as follows:

  • Formulation of the desired technical properties (specification sheet)
  • Coating of a work-piece for real use (sampling)
  • Optimizing the coating parameters if necessary (fine-tuning of the coating process)
  • Coating of serial resp. single parts under constant quality control

Characteristics of TOPOCROM® coatings

TOPOCROM® principle allows a definite composition of various topographies with different characteristics for industrial use.

„soft“ topography for a fibre friendly surface

The expression „soft topography“ is to be understood in a figurative sense. Of course, this is a hard TOPOCROM® surface, too. But the structure of this Topocrom® coating is so gentle to fibres, filaments, non-wovens or films that we talk about a „soft“ surface. This coating is ideal for processing technical fibres such as carbon, basalt, glass or aramid.

Air cushions prevent adhesion

No adhesion on surfaces for film production due to air cushion formation in the identations.

Transportation of fluids and wettability

This special property of the TOPOCROM®-coating enables a liquid film (e.g. water, paint or lubricant) to be applied evenly to rotating rollers and rolls. The surface structure allows a defined liquid transport.

Embossing properties for the rolling process

In the steel industry TOPOCROM®-coated skin-pass rolls are used for the rolling process of thin sheet. In this way the structured surface is transferred into the sheet. These metal sheet surfaces considerably ameliorate the forming behaviour and form an ideal basis for modern painting (without filler, no moiré effect).

Good demoldability

No sticking of injection moulded parts, excellent flowing ability during extrusion process

Sliding or grip

Optimized sliding abilities due to reduced contact area. Good grip properties with appropriate pressure load.

The TOPOCROM technology for surface coatings

The coating process takes place in a closed reactor. The work-piece is rotated constantly. The process fluids are pumped continuously through the reactor to achieve important quality advantages.


Reproducibility of the coating process

A suitable controlling system is necessary for the production of the individual surface properties and for the recall of data in case of repeat orders. For each demand the ideal surface topography is developed and saved in the computer.
Production method, coating times, galvanic processes, pre-treatment and finishing are reproducible with the identical result anytime. Thus the same surface is generated again and again.

The computerized control system of the production processes and the following inspection in the test lab as well as the quality control guarantee a product of highest quality.

Exact surface analysis with industrial 3-D measurement technology

DIN EN ISO compliant roughness determinations, analyses of 3D structures and determination of geometries can be performed with the ysurf mobile. These analyses are part of our quality assurance.

Layer construction in one working step

The construction of a layer system (base layer, structured layer, top layer) takes place in a single operation.


High suitability for rotation-symmetric work pieces

The process in the rotary reactor is ideal for coating rollers, rolls, thread guides or other rotation-symmetric respectively cylindrical elements. Also for the interior coating of pipes, this process technology is very suitable and approved.
This results in a variety of applications TOPOCROM®-process.

TOPOCROM® – out of responsibility for the environment

Energy-efficient surface coating without emissions

The TOPOCROM® process offers significant advantages in terms of environmental protection. The closed reactor process prevents contamination of people and the environment. The rinsing water is treated internally - through this and thanks to the closed electrolyte circuits, water consumption and waste quantities are reduced to the absolute minimum. During operation, only clean air is released into the environment after appropriate cleaning processes.
The surface coating in a single operation does not require any finishing. Thus, the material is used optimally. Last but not least, the process in a closed reactor is a particularly energy-efficient process compared to traditional electroplating.

Economical and durable surface coatings

The products coated according to the TOPOCROM® technology also contribute to the protection of the environment in everyday industrial life. Due to the specifically controlled properties and characteristics of the coating that are completely adjusted to the applications and the particular processes, machines with TOPOCROM® coated parts work very efficiently. This helps to save energy.
The particularly resistant surfaces also ensure long operating and service lives of the tools. As a result, fewer spare parts are needed.

Technical report with detailed information:
Process and systems engineering of TOPOCROM®

Corporate video with animated schematic representation of the TOPOCROM® process:
Work pieces, process and systems engineering