Stainless Steel Pickling Paste 1 KG

In most cases where stainless steel is used some form of post weld cleaning will be necessary particularly where ultraclean surfaces are required as in the case of pharmacetical or food processing equipmentStainless steels corrosion resistance results from a thin transparent layer of chromium oxide formed on its surface during production When this film is present the metal is in a passive state During fabrication and welding the film can be damaged by scratches the formulation of surface oxides including heat tint and embedded iron This can reduce the chromium of the surface metal preventing the passive film from reforming naturally As a result areas of lower corrosion resistance are formedTo restore the protective surface these areas are typically treated eg by immersing the fabrication in a pickling bath The use of pickling pastes arises where a fabrication is too large to fit into a picking bath or where either the pickling has to be done in situ or where localised pickling is required such as on a weld seams The pickling paste removes any resulting free iron or surface contamination