Optimized Grind Finishing (OGF)® - A breakthrough in the surface finishing of stainless steel


The Optimized Grind Finishing (OGF)® process from BOLZ INTEC represents a significant advance in the surface treatment of stainless steel containers. By minimizing adhesion, improving cleanability and increasing corrosion resistance, the OGF® process offers considerable economic and ecological advantages for companies in the cosmetics, pharmaceutical and chemical industries.

Benefits of the OGF® process:

  • Improving product quality
  • Increasing production efficiency
  • Reduction in operating costs
  • Strengthening the competitive position

Basics & meaning of OGF®

The "Optimized Grind Finishing" (OGF)® process from BOLZ INTEC represents a groundbreaking innovation in the surface treatment of stainless steel containers. The special significance of this process lies in the significant reduction of particle adhesion on the inside of the container and the improvement of the cleaning properties of the stainless steel surface. OGF® is a targeted, scientifically based process that outperforms conventional mechanical processing methods by creating a finer and more uniform surface structure.

Scientific background of attachment

The adhesion of particles to stainless steel surfaces is influenced by several physical forces, including adhesion, capillary forces and Van der Waals forces. These forces act together and determine how firmly particles adhere to the surface. To minimize these forces and thus reduce adhesion, precise control of the surface finish is required.

Adhesion: Adhesive forces are created by molecular interactions between the stainless steel surface and the adhering particles. These forces are particularly strong if the surface has rough or irregular structures.

Capillary forces: Capillary forces occur when liquids rise into tiny gaps or pores in the surface and drag particles with them. These forces can have a particularly strong effect on microstructured surfaces and increase adhesion.

Van der Waals forces: These attractive forces act between molecules and are present in almost all materials. They also contribute to the adhesion of particles, especially on smooth surfaces.

Optimized Grind Finishing® - Process & advantages

The OGF process was developed to minimize these physical forces and create a virtually particle-repellent surface. The use of geometrically indeterminate abrasive media and a precisely controlled, slow grinding process produces a surface with extremely low roughness values and low surface energy.

Reduced surface roughness: The OGF® process achieves extreme smoothing of the stainless steel surface, significantly reducing roughness. A smoother surface provides less surface area for particles to adhere to.

Lower surface energy: By reducing the surface energy, the stainless steel surface becomes more hydrophobic, which reduces the adhesion of aqueous substances. This is particularly advantageous in the cosmetics, pharmaceutical and chemical industries, where many water-based products are manufactured.

Removal of the Beilby layer: The mechanical processing of stainless steel leads to the formation of the so-called Beilby layer, which hinders the formation of an optimal chromium oxide-rich passive layer. The OGF® process removes this layer, enabling the formation of a more durable passive layer that improves corrosion resistance.

Practical applications & results

In practice, the use of the OGF® process brings numerous advantages for a whole range of industries. Companies that use stainless steel containers with an OGF® surface benefit from improved production efficiency and product quality thanks to contamination-free production, maximum hygiene and cleanliness and therefore fewer production downtimes and product recalls. Stainless steel surfaces from BOLZ INTEC guarantee compliance with GMP and EHEDG.

Minimal adhesion & improved cleaning: Stainless steel surfaces treated with the OGF® process show a drastically reduced adhesion of particles. This makes cleaning much easier, as less residue remains on the inside walls of the containers. The cleaning process is therefore faster and more efficient, which leads to a significant reduction in downtimes and a reduction in operating costs. At the same time, the minimal adhesion to the inner walls of the container reduces product losses and therefore increases output.

Reproducible quality: The OGF® process guarantees a consistently high quality of surface finish. In contrast to conventional grinding and polishing methods, in which variable factors such as manual contact pressure or the quality of the abrasives play a role, the OGF® process offers consistent surface quality even for large quantities.

Improved corrosion protection: The optimized mechanical processing and subsequent electropolishing not only improves the surface quality, but also promotes the formation of an optimal chromium oxide-rich passive layer. This significantly improves the corrosion protection of stainless steel containers, which is particularly important in the chemical and pharmaceutical industries.

Reduced risk of batch contamination: The improved cleaning behavior of OGF®-treated stainless steel surfaces leads to a significant reduction in residual particle adhesion. This minimizes the risk of contamination between different product batches, which is particularly critical in the pharmaceutical industry.

Optical aesthetics & low number of defects : Surfaces treated with the OGF® process have an attractive appearance and show fewer structural defects. This is not only aesthetically advantageous, but also reduces the risk of microscopic defects that could promote adhesion.

Future & Innovation

BOLZ INTEC continuously focuses on research and development in order to further optimize the OGF® process and adapt it to the changing needs of the industry. Future innovations can expand the areas of application and further increase the efficiency and sustainability of production processes.

Sustainable production: The continuous optimization of the OGF® process contributes to sustainability by extending the service life of stainless steel containers and reducing the consumption of resources. More efficient cleaning and the reduced need for cleaning agents and water make an additional contribution to protecting the environment.



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