Stainless Steel Passivation & Acid Pickling Process

 

In modern industrial production, stainless steel materials are widely used due to their excellent corrosion resistance, wear resistance, and aesthetics. However, after high-temperature processing such as welding and cutting, an oxide film will be formed on the surface of stainless steel, which affects its performance. In order to restore the performance of stainless steel, we need to carry out a process called passivation and acid pickling. So, how does passivation and acid pickling work? What magical effects does it have? Next, let's uncover the mystery of passivation and acid pickling together.

 

Passivation and acid pickling is a chemical treatment process, mainly used to remove the oxide film on the surface of stainless steel and restore its original performance. This process mainly includes two steps: acid pickling and passivation.

 

Firstly, let's look at the acid pickling step. Acid pickling is to immerse or spray the stainless steel with an acidic solution to dissolve the oxide film on its surface, thus achieving the purpose of cleaning. In this process, the concentration, temperature, and treatment time of the acidic solution will affect the effect of acid pickling. Generally speaking, the higher the concentration of the acidic solution, the higher the temperature, and the longer the treatment time, the better the effect of acid pickling.

 

Then, let's look at the passivation step. After acid pickling, a stable and dense protective film is formed on the surface of stainless steel through chemical reaction to prevent it from being oxidized again. In this process, the composition, concentration, and treatment time of the passivation solution will affect the effect of passivation. Generally speaking, the passivation solution contains elements such as chromium and nickel, which can form stable compounds with iron in stainless steel, thereby improving its corrosion resistance and wear resistance.

 

So, what magical effects does passivation and acid pickling have?

 

Firstly, passivation and acid pickling can improve the corrosion resistance of stainless steel. Through acid pickling and passivation, we can remove the oxide film on the surface of stainless steel to prevent it from being corroded. At the same time, passivation treatment can form a protective film with high hardness on the surface of stainless steel to improve its wear resistance.

 

Secondly, passivation and acid pickling can improve the wear resistance of stainless steel. Passivation treatment can form a protective film with high hardness on the surface of stainless steel to improve its wear resistance.

 

Finally, passivation and acid pickling can improve the aesthetics of stainless steel. After passivation and acid pickling treatment, the surface of stainless steel will become smoother and brighter, improving its aesthetics.

 

In general, passivation and acid pickling is a very effective surface treatment process for stainless steel. It can restore the performance of stainless steel and improve its corrosion resistance, wear resistance, and aesthetics. Therefore, whether in industrial production or in daily life, we can see the figure of passivation and acid pickling. I hope that through this article, you can have a deeper understanding of passivation and acid pickling.