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Detection and Evaluation Technique of Hydrogen Attack  

Won, Soon-Ho (Nondestructive Evaluation Group, Korea Institute of Machinery and Materials)
Hyun, Yang-Ki (Nondestructive Evaluation Group, Korea Institute of Machinery and Materials)
Lee, Jong-O (Nondestructive Evaluation Group, Korea Institute of Machinery and Materials)
Cho, Kyung-Shik (Nondestructive Evaluation Group, Korea Institute of Machinery and Materials)
Lee, Jae-Do (Nondestructive Evaluation Group, Korea Institute of Machinery and Materials)
Publication Information
Journal of the Korean Society for Nondestructive Testing / v.22, no.1, 2002 , pp. 32-37 More about this Journal
Abstract
The presence of hydrogen in industrial plants is a source of damage. Hydrogen attack is one such form of degradation and often causing large tube ruptures that necessitate an immediate shutdown. Hydrogen attack may reduce the fracture toughness as well as the strength of steels. This reduction is caused partially by the presence of cavities and microcracks at the grain boundaries. In the past several techniques have been used with limited results. This paper describes the application of an ultrasonic velocity and attenuation in hydrogen damage. Ultrasonic tests showed a decrease in wave velocity and an increase in attenuation. Such results demonstrate the potential for ultrasonic nondestructive testing to quantify damage. Based on this study, reliable recommendation is suggested to detect hydrogen attack.
Keywords
hydrogen attack; nondestructive testing; velocity measurement; attenuation; backscatter; boiler tube;
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  • Reference
1 N. Trimborn and J. Verkooijen, Hot Hydrogen Attack, ECNDT '98, Vol. 3, No. 10, (1998)
2 H. Thielsch, Defects and Failures in Pressure Vessels and Piping, Robert E. Krieger Publishing Co., Huntington, New York, pp. 333-369, (1965)
3 R.Viswanathan, Damage Mechanisms and Life Assessment of High-Temperature Components, ASM International, pp. 352-363, (1989)
4 N. O. Cross and A. R. Ciuffreda, Development and Application of a Nondestructive Ultrasonic Test for Detecting High-Temperature Hydrogen Attack of Steels, Unexpected Material Failures, pp. 39-46
5 J. Takatsubo and S. Yamamoto, Study of the Fracture Mechanism of Hydrogen-Attacked Steel by Acoustic Emission Technique, Progress in Acoustic Emission VI, The Japanese Society for NDI, pp. 513-520, (1992)
6 A. S. Birring, M. L. Bartlett and K. Kawano, Ultrasonic Detection of Hydrogen Attack in Steels, Corrosion, Vol. 45, No. 3, pp 259-263, (1989)
7 T. Watanabe, Y. Hasegawa and K. Kato, Corrosion Monitoring in Industrial Plants using Nondestructive Testing and Electrochemical Methods : Ultrasonic Velocity Ratio Method for Detecting and Evaluating Hydrogen Attack in Steels, ASTM STP 908. G. C. Moran and P. Labine, Eds., Philadelphia, pp. 153-164, (1986)
8 A. S. Birring, D. G. Alcazar, J. J. Hanley and S. Gehl, Ultrasonic Detection of Hydrogen Damage, Materials Evaluation, Vol. 47, pp. 345-350, (1989)
9 A. S. Birring, Nondestructive Detection of Material Degradation Caused by Creep and Hydrogen Attack, Mat. Res. Soc. Symp. Proc., Vol. 142, Material Research Society, (1988)