Pickling is the removal of any contaminants, high temperature scale and any adjacent low chromium layer of metal from the surface of stainless steel by chemical means. Typically a combination of Nitric and Hydrofluoric acids are employed.
Passivation is the treatment of the surface of stainless steels, often with acid solutions (or pastes), to remove contaminants and promote the formation of the passive film on a freshly created surface (eg through grinding, machining or mechanical damage).
All stainless steel product handled by Spiral Products is supplied to our customers in the pickled or passivated condition. This means all tube or fabricated product is degreased before it goes through our large heated acid baths ensure a highest quality pickling of the stainless steel surface.
Spiral Products offers this flexibility to our customers and fabricators to pickle and passivate their own stainless steel assemblies. This is a fast and competitive turn around and is far superior than pickling by hand. This presents as an aesthetically pleasing silver colour.
Key benefits of using Spiral Products Tube or Pipe:-