The Corrosion Failure Analysis of Plate Pipe for Plate Heat Exchanger

Wen Ming Song; Gui Rong Yang; Yuan Hao; Yu Fu Zhang

doi:10.4028/www.scientific.net/AMR.750-752.2252

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 750-752The Corrosion Failure Analysis of Plate Pipe for...

The Corrosion Failure Analysis of Plate Pipe for Plate Heat Exchanger

Abstract:

The plate of the heat exchanger leaked owing to its corrosion during the running of the whole equipment. The composition of the failure plate, microstructure, corrosion appearance and the chemical composition of the corrosion products were analyzed through Optical microscope, scanning electron microscope and chemical analysis method to find out the reason of the failure. The results show that the chemical composition of the plate meet the requirement of S31254 (254SMO) according to standard A240 /A240M-2005. The main phase was austenite among which the ferrite distributed in stripe. The corrosion happened firstly at the ferrite area under the condition of running medium with chlorine ion and sulfur ion. Incomplete solution of ferrite during the solid solution treatment was the main cause of spot corrosion, which ultimately resulted in the leaking failure owing to the corrosion.

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Periodical:

Advanced Materials Research (Volumes 750-752)

Pages:

2252-2257

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.750-752.2252

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Online since:

August 2013

Authors:

Wen Ming Song*, Gui Rong Yang, Yuan Hao, Yu Fu Zhang

Keywords:

Corrosion Appearance, Corrosion Products, Heat Exchanger, Microstructure

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* - Corresponding Author

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