Pickling Treatment

Care & maintenance can improve the appearance and increase the life of a stainless steel product. There are many treatments for this. But Passivation is one of the best treatments to remove contaminants. But if you need absolute control, Pickling provides a best way of scaling, applying spot treatments, removing contaminants, and restores the surface of stainless steel. It is Available as paste and gel. This treatment helps in maximizing the corrosion resistance of welded or heat treated steels.

Pickling Solutions

There are various forms of Pickling solutions, but all the solutions use acid to accomplish its goals. Pickling basically removes thin layer of chromium-depleted steel so to clean and restore the exposed surface and gives it the same characteristics as that of the raw metal. Some of the basic common components of pickling solutions include nitric hydrofluoric acids & hydrochloric with varying levels of concentration.Most pickling products use alternative ingredients to improve performance, protect steel, or increase safety.

Some of the common uses of Pickling solutions are:

• Removing of the mill scaling

• Removing stains and impurities

• Removing of oxides from welding

Pickling is available in a varying forms. pickling solutions are best for full submersion and spot treatment for the bathing of liquors to thick pastes.Other most common uses for stainless pickling is to remove discolouration from the welding. 

By the applying of paste or gel to the welds, a better cleaner appearance can be attained and corrosion resistance can be restored. But one of the most important things to be noted is that pickling treatment removes the depleted layer of chromium so that the pickled surface may not match in finish and visual brightness to the untreated surface. One should consider combining both pickling and passivation to ensure an even appearance and to get strong passivation layer.

Applying of the Pickling Solutions:

Pickling solutions are highly acidic in nature, One must be careful during both the pickling process and also while disposing of any resulting product. The acids can also create create fumes.

You should always consider consulting the MSDS data and manufacturer recommendations before using the pickling solution because concentration levels and ingredients can vary between the products. Pickling liquors are most commonly used in baths for the submersion of fabricated stainless steel items. Most products require this treatment for half hour or maximum to a period of an hour.

One of the most important thing is to thoroughly clean the surface you wish to pickle because acids are not designed to remove oils, greases, and other similar contaminants so one must always consider cleaning it before Pickling treatment to get the best out of it.