Stainless  Restora‚Äčtion 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.

NDT Inspection Ink


Often red and white colour contrast ink/paint system used for dye penetrate testing.It is important that this is removed particularly if it is not HF type (halogen free). Halogen free types are suitable for stainless steel and do not contain deleterious substances such a chlorides.

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 product will detach itself from the surface very easily and will readily contaminate any product that will pass over its surface, therefore it must be removed before the fabrication enters into service.


This product is only lightly adhered to the surface and can be removed with low strength chemicals. The area needs to be HP washed down with plenty of clean water to remove all traces.

Method: Cover the entire fabrication with one of the cleaners listed in the product section. If the fabrication is large and the area to clean of NDT chemical is small then the offending area can be wiped down with Enerjex 410 or 425. Once the offending chemical stain is removed the area needs to be HP washed or wiped down with clean water.

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.