Study on Corrosion Behaviors of the PTA Plant in Halogen

Abstract:

In the acetic acid solution containing bromine ions, Br- has strong penetration ability, which cause PTA production device serious pitting corrosion, and even perforation failure. This paper use the immersion method and the electrochemical experiment, to study the corrosion behaviors of austenitic stainless steel which is commonly used in equipment 316L and 1Cr18Ni9Ti in the acetic acid solution containing bromide ions. The results show that: In a certain temperature range, as the temperature rising, 316L and 1Cr18Ni9Ti's annual average corrosion depth shows the changing law of type curve. At the start, the annual average corrosion depth increases rapidly, and after the passivation film formation, the rate of increase slows. With the increase of the Br- concentration, 316L and 1Cr18Ni9Ti's corrosion rate increases, but apparently the 316L than 1Cr18Ni9Ti slow growth of many.

• Periodical: Applied Mechanics and Materials (Volumes 217-219)
• Pages: 496-500
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.217-219.496
• Online since: November 2012
• Authors: Jin Gang Wang, Ying Gao
• Keywords: Acetic Acid, Bromine Ions, Corrosion, Stainless Steel (SS)

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