Pickling and Passivation Stainless Steel

Pickling and Passivation is chemical treatments applied to the surface of stainless steel to remove grease or oil. Pickling and Passivation is the process used to remove weld heat tinted layers from the surface of stainless steel. The result of these visible oxide layers is usually a reduction in ambient temperature corrosion resistance. Both pickling and passivation are chemical processes that are utilized to provide protection to metals against corrosion and pitting. An acidic solution is applied to the metal surface to remove contaminants and to aid in the formation of a continuous, chromium-oxide passive film. The passivator, applied by immersion or spraying, strengthens the passive layer. Because the passivator also removes iron impurities from the surface, the treatment is more important after mechanical cleaning and operations involving a risk of iron contamination.

Pickling and Passivation products can be applied in three different ways like Brushing using a paste or gel, Spraying using a pickling and passivation solution and circulation in a bath.

The processes of pickling and passivating steel offer many benefits for metal products, including:

  • Both pickling and passivation removes surface contamination.
  • Pickling removes hint tint or weld discoloration.
  • Passivation maximizes corrosion resistance.

New Azad Buffing Works has been performing Pickling and Passivation for over 22 years. We Pickling and Passivating stainless steel and other metallic surfaces to remove corrosion and weld damage from steam, heat and other corrosive environments. Our SS Pickling and Passivating process is a nonselective surface treatment that removes oxidation from stainless steel on heavily corroded surfaces. We delivers chemical cleaning and pickling & passivation services to installed systems, pre operational, pre commissioning of new construction, post modification or for maintenance during shut-downs. We can perform our on-site at your facility.

We can process pickling & passivation services on Pipes, Tanks, Vessels, Plates, Sheets, Bars, Coil, Alloy, Angles, Tubes, Strip, Welds Joints, Cookware, Cutlery, Garden Equipment, Furniture, Building Structures, Escalators, Vehicles, Tankers, Surgical Tools, Medical Equipment, etc.

We can process pickling & passivation services on stainless steel grades 301, 302, 304, 316, 410, 321, 1008, 1010, 304L, 316L, ASTM A312 and Super Duplex grade. As well as on various materials like Stainless Steel, Carbon Steel, Alloy Steel, Aluminum, Copper, Brass, Bronze and Metal.

Pickling and Passivation Stainless Steel Procedure

  • Descaling

    Descaling is the removal of a thick visible oxide scale from the surface. This process is done routinely in the manufacturing steel parts before the steel is delivered.

  • Pickling

    Pickling is the removal of a thin layer of metal from the surface of the stainless steel. Concoction of nitric and hydrofluoric acid are usually used for pickling. Pickling is the process used to remove heat marks from the surface of stainless steel. There is a range of pickling methods that can be used on stainless steel is Spray pickling and Circulation pickling.

  • Passivation

    Passivation is a method of improving the corrosion resistance of stainless steel parts by removing ferrous contaminants like free iron from their surface, restoring them to their original corrosion specifications.

  • Cleaning

    Cleaning includes all operations necessary to ensure the removal of surface contaminants from steel parts. Cleaning are removes grease, oil, paint, clay, gravel and other coarse contaminants after pickling and passivation.

Application Industries

Automobiles, Auto Components, Aviation, Aerospace, Biotechnology, Cement Plant, Chemicals, Manufacturing, Engineering and Capital Goods, FMCG, Gems and Jewellery, Healthcare, Kitchenware, Medical Devices, Metals and Mining, MSME, Oil and Gas, Pharmaceuticals, Petrochemical, Railways, Steel, Textiles as well as on various materials like Stainless Steel, Aluminum, Copper and Metal.

Our Network

New Azad Buffing Works Pickling and Passivation Services Provider Under One Roof in India’s major States like Gujarat, Maharashtra, Tamil Nadu, Rajasthan, Madhya Pradesh, Uttar Pradesh, Andhra Pradesh, Karnataka, Odisha, Chhattisgarh, Telangana, Bihar, West Bengal, Arunachal Pradesh, Assam, Uttarakhand, Punjab, Haryana, Kerala, Tripura, Goa etc. As well as Gujarat major cities like Ahmedabad, Surat, Vadodara, Rajkot, Bhavnagar, Jamnagar, Junagadh, Gandhinagar, Gandhidham, Anand, Navsari, Morbi, Nadiad, Surendranagar, Bharuch, Mehsana, Bhuj, Porbandar, Palanpur, Valsad, Vapi, Gondal, Veraval, Godhara, Patan, Kalol, Dahod, Botad, Amreli, Deesa, Jetpur. We also doing ON-SITE JOB WORKS at Important Ports like Kandla port, Mumbai Port, Visakhapatnam Port, Marmagao Port, New Mangalore Port, Chennai Port, Cochin Port, Haldia Port, Tuticorin Port, Ennore Port and Vizag Port.