Pickling and passivation stainless steel – ASTM A380


Pickling is a process to remove the depleted outer Chromium layer where it no longer protects, due to the transformation from Chromium Oxide to Chromium Carbide. In this layer the content of Chromium is reduced to a minimum to protect the alloys surface.

So Pickling ensures the cleaning of the surface through etching with specific Acids to remove the Heat Tint from the HAZ (Heat Affected Zones) and any scale or contamination from the operational medium, to render the surface as new alloy, has come out from the mill.

Whereas Passivation is a process to enrich the Oxygen content around the alloys surface to react with a new layer of the Chromium and to regenerate, a newer protective layer of Chromium Oxide. So, Pickling and Passivation is a work package that cleans and protects your stainless steel. 


We have the experience and skills necessary to tackle just about every type of job that comes our way. With Chemical Cleaning Services, clients know exactly what to expect - professionalism, efficiency and exceptional results.

Our company, Chemical Cleaning Services (CCS),  is capable of performing pickling and passivation of all grades of Stainless steels. We successfully pickled and passivated almost all types of stainless steel pressure vessels, tanks, pipelines, spools, etc.

Our Pickling and Passivation operations are conducted according to the guidelines and recommendations of ASSDA and ASTM A380 & A967 through our parent company.
We are able to pickle and passivate Austenitic, Duplex, Super Duplex and all other special alloys. Our chemistry is based on Nitric acid and Hydrofluoric acids mixture that is deemed to remove all the Heat Affected Zone discolorations and to restore the protective Chromium Oxide layer.
CCS carries out the pickling and passivation of the stainless-steel structures/systems regardless the shapes or the sizes.

We have our experienced team and the proper equipment to pickle and passivate them by dipping in immersion tanks, spraying the surfaces using the chemicals mixtures in Gel form or by re-circulation of the pickling liquid using our compatible hoses and pumps.

SS vessels 2

Stainless steel vessels after Passivation

SS Grating Before and After

Stainless steel Gratings before and after Passivation

spools before

Stainless steel Spools Before Pickling and Passivation

Spools After

Stainless steel Assorted Spools post Passivation

rtStainless steel Spools after Passivation

Pickling and Passivation

Pre and Post Pickling and Passivation 

Pickling and Passivation of Stainless Steel Cable TraysStainless steel Cable Trays after Passivation

Pickling and Passivation of SS gratingsStainless Steel Gratings after Passivation

Pickling and Passivation of SS Fan CasingsPickled and Passivated Stainless steel Fan Casings 

Pickling and Passivation of SpoolsPassivated and Preserved SS spools

Pickling and Passivation of Assorted SpoolsPickled and Passivated Spools left for Drying 

Pickling Passivation of 3 spoolsPreservation after Pickling and Passivation

Passivation ofBrewery TanksPickling and Passivation of Brewery Tanks 

Passivation of Welding Joints

Pickling and Passivation of Welding Joints

Passivation of SS spools

Pickling and Passivation of Stainless Steel Spools 

Passivated Spools

Preservation after Pickling and Passivation of Spools

©2021 by Chemical Cleaning Services all rights reserved