Material corrosion and selection under high-temperature conditions with concentrated acetic acid
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Many studies have been conducted on material corrosion in acetic acid media, with temperatures generally not exceeding 150 degrees. Depending on the influence of impurities, it is generally believed that Hastelloy and titanium materials outperform duplex stainless steels and super stainless steels, which in turn perform better than ordinary stainless steels and copper. In the absence of halogens, 316L can also resist acetic acid corrosion quite well. So, the current situation is as follows: there are two types of acetic acid media available. 1. With a concentration of around 40%, a halogen content of about 1000 ppm, and a temperature of around 190 degrees, with a maximum of 220 degrees. 2. The concentration is greater than >99.5%, with halogens present at around 2000 ppm; the temperature is around 200 degrees, with a maximum of 250 degrees. May I ask what materials can withstand the above two operating conditions? I earnestly ask the expert friends to share their valuable guidance!
Thank you for sharing, I’m coming to learn* a bit
Based on the information you provided, the acetic acid medium with a concentration of 40% contains a high level of halogens, and the temperature is high, reaching up to 220 degrees. The acetic acid medium with a concentration of over 99.5% has a higher halogen concentration, and the temperature can reach up to 250 degrees. These conditions impose strict requirements on the corrosion resistance of the material. In such conditions of high concentration, high temperature, and the presence of halogens, it is recommended to use the following materials: 1. Super stainless steel: Super stainless steel possesses excellent resistance to corrosion and is suitable for use in media containing concentrated acetic acid as well as in high-temperature environments. For example, the UNS S31254 (254 SMO) material is commonly used in similar applications. 2. Nickel-based alloys: Nickel-based alloys possess excellent corrosion resistance and high-temperature performance. For example, materials such as Inconel 625 and Incoloy 825 perform well in a medium of concentrated acetic acid. 3. Titanium alloys: Titanium alloys are also materials with good corrosion resistance, showing stability in concentrated acetic acid and high-temperature environments. Please note that the suggestions above are for reference only; the specific material selection should be determined based on your actual operating conditions and requirements. It is recommended to consult the manufacturer or professional engineers when selecting materials to ensure that suitable materials are chosen. .
This post was last edited by molding on 2023-7-12 14:39 regarding C22 Hastelloy. Silicon carbide
Based on the operating conditions you mentioned, zirconium material R60702 can be chosen; it is a proven material for use in the acetic acid industry.
Are there any publications on this topic? I would appreciate your advice. Thank you
Titanium is also a good choice; I have practical experience in this area.
Thank you. What is the title of this article? Please let me know