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ASM Failure Analysis Case Histories

Handbook of Case Histories in Failure Analysis

Edited by
Khlefa A. Esaklul
Khlefa A. Esaklul
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ASM International
Volume
2
ISBN electronic:
978-1-62708-215-0
Publication date:
1993
Book Chapter

Hydrogen Damage in a Waterwall Boiler Tube Section

By
Wendy L. Weiss
Wendy L. Weiss
Mechanical and Materials Engineering Department, Radian Corporation
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Published:
1993
Page range:
271 - 273

Abstract

The rear wall tube section of a boiler that had been in service for approximately 38 years was removed and examined. Visual examination of the tube revealed a small bulge with a through-wall crack. Metallography showed that the microstructure of the bulged area consisted of a few partially decarburized pearlite colonies in a ferrite matrix. The microstructure remote from the bulged area consisted of pearlite in a ferrite matrix. EDS analysis of internal deposits on the tube detected a major amount of iron, plus trace amounts of other elements. The evidence indicated that the bulge and crack in the tube resulted from hydrogen damage. Examination of the remaining water circuit boiler tubing using nondestructive techniques and elimination of any heavy deposit buildup was recommended.

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Wendy L. Weiss, 1993. "Hydrogen Damage in a Waterwall Boiler Tube Section", Handbook of Case Histories in Failure Analysis, Khlefa A. Esaklul

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