Seeking help regarding the corrosion of 316L material
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I need help determining whether 316L material can be used in this situation: as part of a process upgrade, we are changing the reaction vessels from glass to metal. I would like to ask whether 316L material can be used for this situation. Reaction conditions: 150 degrees, negative pressure of 0.1 MPa; the corrosive medium is acetic acid. Around 320 degrees, at atmospheric pressure; the corrosive medium is oleic acid. There are no chloride ions in the entire reaction solvent. Under the current process, glass reactors are used, and the stirrers are made of 316L material. After 3 months of use, the weight loss of the stirrer blade was: 0.1%. I would like to ask whether a 316L material reactor can be used in this situation
Just read a post [Talk by the Curator of Corrosion-Resistant Metals] Acetic acid! You brat are actually so audacious! Who else can reduce it? http://bbs.hcbbs.com/thread-1559963-1-1.html (Source: Haichuan Chemical Industry Forum) The article mentions that 316 is not resistant to acetic acid corrosion
316L is no longer suitable for 150-degree acetic acid; 2205 composite stainless steel should be considered
• Hastelloy C-276 • Members of the Hastelloy B series: such as Hastelloy B2 or Hastelloy B3 (avoid environments with oxygen levels above 50 ppm or oxidizing agents) • Zinc (the best choice :)
We considered Hastelloy before, but its cost is too high; so we’ll start with 316L for now
2205 or 2507 is recommended
The temperature has already exceeded 250 degrees, so 2205 is not suitable
This post was last edited by Anhui Dabang Anti-corrosion on 2016-10-26 09:39. It’s fine; it belongs to the category of duplex stainless steel, which is resistant to high temperatures and corrosion. Its performance is inferior to that of titanium, but its price is lower than titanium’s. Suitable for your working conditions.