Human beings use a wide variety of metals in their everyday life. Most of these metals are obtained from the nature in the raw form, and then it is sent to the industrial units for refining. Usually, refining purifies the metal but it cannot remove all the impurities. Due to this, the industries use some other processes to remove those left-over impurities. The purification of stainless steel is no exception here as it also undergoes some processes before it becomes usable.

The industrial units use the processes of Passivation to remove some of the impurities. Technically, Passivation is a type of processing that the industries use to eliminate the impurities that are difficult to be removed using any other processes. The most important reason behind using the Passivation processes is to remove the impurities and make the metal safe for use. Passivation is a critical process that is conducted under the guidance of the experts. Usually, a number of methods are applied to remove the impeding impurities. Among the top methods of Passivation, the industries use Citric Acid, Nitric Acid, and some other methods to remove the impurities from the metal and get the purest as well as safest form of the metal.

Noticeable Benefits of Passivation:
1.Neat and clean Appearance of the metal & its Finish
2.Sanitation and purity
3.Enhanced Corrosion Resistance
4.Superior & comprehensive Life of Product
5.Polished Surface

ASTM A967 is a trusted method of Passivation. The term ASTM stands for American Society for Testing and Materials. As the name tells, ASTM is the most accepted standard for Passivation of stainless steel. The standard of ASTM A967 is tried and tested time and again. Following are the salient features of this top international standard. Quite understandably, it is a widely-accepted standard that is gaining all over the world. The said standard suggests some tests in the most urgent manner. Following are some of the tests:
•Damp Cloth Test
•High Humidity Test
•Boiling Water Immersion Test
•Water Immersion Test
•Salt Spray Test
•Copper Sulfate Test
•Potassium Ferricyanide-Nitric Acid Test

The entire process of Stainless steel Passivation is completed in a few steps, and every step needs to be completed before moving on to the subsequent steps. One must understand that every subsequent step depends on the previous step. ASTM A967 is trusted by the leading industries for the best standard of stainless steel Passivation. Most of these industries accept that the second step of the process is more important than most of the other steps. It makes use of Citric Acid as the main ingredient for Passivation process. Technically, Citric Acid is more accepted than any other process that often includes other ingredient like Nitric Acid.

Benefits of Steel Passivation:
•It brings improved corrosion resistance to the metal.
•It removes the harmful oxides that work as impurities in the metal.
•It brings uniform and smooth appearance to the metal, making it look better in terms of finish.
•It makes the metal get a polished surface.
•Cleanliness
•It betters the longevity of the metal. It becomes safe against the possible damages.