The corrosion resistance of stainless steel is based on the formation of a very thin chromium oxide-rich passive layer, which is formed only on metallically pure stainless steel surfaces.
Scale layers, welding colours and tarnish, ferritic impurities (e.g. abrasion) and mechanical processing (e.g. grinding, blasting, etc.) inhibit the formation of a closed passive layer.
Only fully controlled pickled stainless steel surfaces and weld seams therefore guarantee full corrosion resistance of the material and offer a decorative metallic appearance.
Chemical pickling processes
Depending on the requirements and size of the workpieces, the components to be pickled are immersed into pickling baths or the pickling medium is sprayed directly onto the metal surface and rinsed off with conditioned (demineralised) water.
The chemically pickled components are then passivated and acid-free rinsed with conditioned water with limited conductivity.
Even the pickling of stainless steel tube systems is no problem for us. The systems to be treated are pickled and passivated with a circulating rinse.
There are next to no limits when it comes to the pickling treatment. Practical examples include:
Every material has particular characteristics. The composition of the metallic alloy has a considerable effect on the pickling treatment. HENKEL pickling supports the following materials, amongst others:
Ask today about the machining options for your components. We would be happy to give you a non-binding offer.