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hydrogen damage

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0048147
EISBN: 978-1-62708-234-1
... and hence embrittlement. The part was concluded to have cracked during phosphating or excessive acid pickling before phosphating. Phosphating (coating) Pickling Carbon steel Fatigue fracture Hydrogen damage and embrittlement During fatigue testing, the power-type counterbalance spring shown...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006784
EISBN: 978-1-62708-295-2
... Abstract Hydrogen damage is a term used to designate a number of processes in metals by which the load-carrying capacity of the metal is reduced due to the presence of hydrogen. This article introduces the general forms of hydrogen damage and provides an overview of the different types...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003552
EISBN: 978-1-62708-180-1
... Abstract This article provides an overview of the classification of hydrogen damage. Some specific types of the damage are hydrogen embrittlement, hydrogen-induced blistering, cracking from precipitation of internal hydrogen, hydrogen attack, and cracking from hydride formation. The article...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001277
EISBN: 978-1-62708-215-0
... Abstract Waterwall tube failure samples removed from a coal- and oil-fired boiler in service for 12 years exhibited localized underdeposit corrosion and hydrogen damage. EDS and XRD revealed that bulk internal deposits collected from the tubes contained metallic copper which can accelerate...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001739
EISBN: 978-1-62708-215-0
... 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. Cracking (fracturing) Carbon steel Hydrogen damage and embrittlement Background The rear...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c9001179
EISBN: 978-1-62708-228-0
... was the cause of damage. Hydrogen liberated by reaction with the iron caused the formation of iron sulfide after penetration of the steel, which had an explosive effect during molecular separation under high pressure. This in turn caused the crack formation in conjunction with the external and residual stresses...
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Published: 01 June 2019
Fig. 1 Carbon steel boiler tube that ruptured due to hydrogen damage. More
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Published: 01 June 2019
Fig. 1 Cracks in naphtha desulfurization reactor attributed to hydrogen damage. (a) Note decarburized region adjacent to crack. 25×. (b) Higher-magnification view. 200× More
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Published: 30 August 2021
Fig. 99 Cracks in naphtha desulfurization reactor attributed to hydrogen damage. (a) Note decarburized region adjacent to crack. Original magnification: 25×. (b) Higher-magnification view. Original magnification: 200× More
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Published: 01 January 2002
Fig. 8 Hydrogen-damaged refinery platformer line (carbon steel, 0.5% Mo). (a) Undamaged microstructure. (b) Decarburization region caused by hydrogen depleting the iron carbides. (c) Microfissuring at inclusions. (d) Hydrogen blister caused by methane gas formation. (a) and (b), nital etch. (c More
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Published: 30 August 2021
Fig. 13 Representative micrograph showing high-temperature hydrogen attack damage in the form of intergranular fissuring and decarburzation in carbon steel. Original magnification: 500×. Etched with 2% nital solution More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0048309
EISBN: 978-1-62708-229-7
... cracking was revealed by microscopic examination of a cross section through the tube wall at the fracture. It was concluded that the rupture occurred because of hydrogen damage involving the formation of methane by the reaction of dissolved hydrogen with carbon in the steel. Hydrogen was produced...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001331
EISBN: 978-1-62708-215-0
... that appeared brittle in nature. Specimens from the fracture area and from an area well away from the fracture were examined metallographically and chemically analyzed. Results indicated that the pipe had failed by hydrogen damage that resulted in brittle fracture. Chemical analysis indicated that the pipe...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c0048835
EISBN: 978-1-62708-220-4
... by metallurgical examination of a cross section of a longitudinal crack. It was concluded that the damage was caused by a form of hydrogen attack. Installation of a used Cr-Mo steel vessel with a type 347 stainless steel weld overlay was suggested as a corrective action. Decarbuization Desulfurizer reactors...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c9001166
EISBN: 978-1-62708-228-0
... product from each pipe section were analyzed for carbon, sulfur, and iron and were found to consist mainly of iron sulfide mixed with soot and rust. The damage resulted from a high content of hydrogen sulfide in the gas (6% CO2, 20% CO, 8 to 12% H2, 0.5 to 1.5% CH4, remainder N2). To process the coal...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001746
EISBN: 978-1-62708-217-4
... Abstract Brittle intergranular fracture, typical of a hydrogen-induced delayed failure, caused the failure of an AISI 4340 Cr-Mo-Ni landing gear beam. Corrosion resulting from protective coating damage released nascent hydrogen, which diffused into the steel under the influence of sustained...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001540
EISBN: 978-1-62708-217-4
... overhaul. The specific source of hydrogen which produced failure was not ascertainable. Aircraft components Chromium plating Cylinders Landing gear 4340 UNS G43400 Intergranular fracture Hydrogen damage and embrittlement Introduction Ground maintenance personnel discovered hydraulic...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001172
EISBN: 978-1-62708-220-4
... Abstract Unalloyed steels and the pure nickel steels frequently used in the past can sustain significant damage from hydrogen attack in ammoniacal environments. The attack causes decarburization that leads to a loosening of the structure due to the precipitation of methane along grain...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0048630
EISBN: 978-1-62708-217-4
... was specified for a sample quantity of bolts from each lot. Electroplating Hydrogen embrittlement Cadmium-plated steel Surface treatment related failures Hydrogen damage and embrittlement Two clevis-head self-retaining bolts used in the throttle-control linkage of a naval aircraft failed...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c0007736
EISBN: 978-1-62708-219-8
... in the concrete. Chlorides Concrete construction Reinforcing steels Wire Steel wire Hydrogen damage and embrittlement Pitting corrosion Single 6.4-mm (0.25-in) posttensioning wires failed in a parking garage in the southern portion of the United States. A typical anchorage with a broken...