News – 04.10.2017

Surface technology

Sustainable surface protection thanks to VZD

VZD – the Chromium-VI-free alternative for electroplating

Chromium-VI is already banned from many industries as a substance hazardous to the environment and seriously hazardous to health. On 21.09.2017 a general prohibition of surface finishes containing Chromium-VI came into force throughout Europe, under the REACH regulations.

Böllhoff parabola


The prohibition affects chromating processes that were previously the standard for electroplated fasteners.

  • Yellow chromating (such as: A3C to DIN EN ISO 4042)
  • Olive chromate
  • Black chromate

Quality, price and availability are the most important criteria when it comes to selecting an alternative surface. Electroplated zinc coatings with Chromium-III thick-film passivation (VZD) satisfy these requirements.

  • High corrosion resistance: 144 h in SSNT (compared to A3C: 120 h in SSNT)
  • Adjusted coefficient of friction: µges = 0,12-0,18
  • Economical and environmental
  • High availability world-wide/ catalogue goods

VZD – the Chromium-VI-free alternative – sustained surface protection


Find out more: related downloads.

If you would like to know more, simply download the relevant brochures.

Title Language Version File Download

To view PDF documents, you will need the free Adobe Acrobat Reader.