Stainless  Restora​tion Ltd

Metal Finishing and Surface Engineering Technologies

SRL Technical Library

PICKLING AND PASSIVATION TROUBLESHOOTING  During, following or indeed before the cleaning operation all sorts of strange things can occur as a result of the chemicals used. Our technical library gives a variety of examples that SRL has encountered along its way. This list is by no means complete - these pages will be continually updated as we/you experience other strange phenomena.

Plastic Film / Burn

Pickling Plastic Film or Burn

Identification

T​his problem usually comes about when the fabricator or welder doesn't peel back the protective film from the stainless steel sheet surface far enough. The heat generated from the welding process burns the film at the edge close to the weld seam and the glue adheres very tight to the steel. If the film is removed completely then the residual glue from the film can still cause issues.

Possible Detriment

Apart from the fact that the surface will look unsightly and indeed, if a food/pharmaceutical bearing surface it will look unhygienic.

The Film will act as a crevice and in certain environments will give rise to corrosion attack.

Solution

The film can either be mechanically removed from the surface ensuring that a fine grit is used. Alternatively, Acetone or other solvent can sometimes help. Nontheless the area adjacent to the weld should be cleaned with solvent to remove any clue residue prior to welding.Method: Wipe the offending area down using one of the solvents listed.

Products  Available

Pickling Products

Cleaning Products

Technical Notes

It is important to follow the instruction given for each individual product used and the advice given in the "product application data sheets" available on line in the product section of SRL Chemical and Analytical Services Ltd.

Information given in this page may be subject to alteration without notice.

Care has been taken to ensure that the contents of this publication are accurate but SRL Site Services Ltd do not accept responsibility for errors or for information that is found to be misleading.

Suggestions for, or descriptions of, the end use or application of products or methods of working are for information only and the company accept no liability in respect thereof.

Before using products supplied or manufactured by the company the customer should be satisfied of their suitability.

If further assistance is required, we have access to extensive research facilities, we will often be willing to help.

Stainless Restoration Ltd, Adamsons Industrial Estate, Hyde SK14 1EE

Stainless Restoration Ltd offer an Electropolishing service to the stainless steel fabrication/manufacturing industry at its newly refurbished fully automated Electropolishing plant at Hyde Manchester.