Can carbon steel containers also be pickled and passivated?
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Hello, experts. These days I’ve been reviewing the specifications sent by the client, which state that for carbon steel surfaces, the treatment required is sandblasting followed by pickling and passivation. Can carbon steel also be pickled and passivated? What are the differences from stainless steel?
Carbon steel cannot be pickled and passivated; some users may not be aware of this, and sometimes they mix up the requirements for stainless steel and carbon steel
There are specialized pickling and passivation solutions, so I think carbon steel can also be pickled and passivated
I think the acid resistance of carbon steel is different from the passive oxidation property of stainless steel; stainless steel aims to form a protective film. Carbon steel, on the other hand, is used to eliminate rust, burrs, etc.
Please refer to: http://bbs.hcbbs.com/thread-1534875-1-1.html, floor 12
Stainless steel can be pickled and passivated, while carbon steel can only be pickled; it cannot be passivated. Carbon steel does not contain chromium, so how can it be passivated? Moreover, carbon steel must be treated with rust prevention measures immediately after pickling.
It can be passivated; this is the principle behind using carbon steel tanks to store concentrated sulfuric acid. Concentrated sulfuric acid undergoes an oxidation reaction with steel directly; the products of this reaction form a dense protective film on the metal surface, preventing further oxidation reactions from occurring. This is what is known as passivation.
Carbon steel can be pickled and passivated; I didn’t know this before, but I saw it done by a cleaning company, and the result was excellent. After pickling and passivation, the surface of carbon steel acquires a silver-gray metallic luster.
Carbon steel can be pickled and passivated; I didn’t know that before. Is it really possible?