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dissimilar metals

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Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001311
EISBN: 978-1-62708-215-0
... the inside surface of a tube in an area above the level of uniform corrosion, showing localized dissimilar-metal corrosion to a depth of 0.38 mm (0.015 in.) in the base metal at an interface with the weld seam. Note the dendritic microstructure of the weld. Electroetched in oxalic acid. 49.4× Fig. 4...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001020
EISBN: 978-1-62708-214-3
... with the origins of the principal fractures in the connection was the cause of failure. It was recommended that the design be modified to avoid dissimilar metal combinations of high corrosion potential. Selected Reference Selected Reference • Warke W. R. , Stress-Corrosion Cracking , Failure...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001030
EISBN: 978-1-62708-214-3
... intrusion from a marine environment and poor hole quality. Failure was intensified by dissimilar-metal contact in the presence of weak acidic electrolyte (dissociated MoS2). Control of machining parameters to prevent formation of brittle martensite, use of galvanically compatible fasteners, and use...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001749
EISBN: 978-1-62708-215-0
... the connection. Use of the adapter which joined with a brass nipple, created an unacceptable dissimilar metal joint. The steel also provided a source for the generation of sparks. Loctite, a hydrocarbon sealant that is highly flammable and explosive in contact with pure oxygen, had been used to seal the threaded...
Image
Published: 01 December 1993
Fig. 3 Typical section through the inside surface of a tube in an area above the level of uniform corrosion, showing localized dissimilar-metal corrosion to a depth of 0.38 mm (0.015 in.) in the base metal at an interface with the weld seam. Note the dendritic microstructure of the weld More
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001099
EISBN: 978-1-62708-214-3
...-applied and treated compatible coatings to avoid corrosion and hydrogen evolution at the dissimilar metal junctions. It was indicated to the compressor owner that although there is probably no single, easy solution to this insidious problem, a number of approaches can minimize it. One possibility...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001457
EISBN: 978-1-62708-219-8
... the resulting galvanic effect between the dissimilar metals would tend, in the presence of leakage, to accelerate corrosion of the steel and probably render removal of the nuts difficult. In the light of this occurrence, the use of studs made from stainless steel of the austenitic type was an unfortunate choice...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c0048808
EISBN: 978-1-62708-228-0
... “Hardfacing, Weld Cladding, and Dissimilar Metal Joining” in Welding, Brazing, and Soldering , Volume 6 of the ASM Handbook ). The precipitates followed the austenitic regions into the duplex structure and eventually disappeared. They undoubtedly contributed to the cracking that occurred...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c0089730
EISBN: 978-1-62708-233-4
... elements in areas adjacent to that area. In addition, the intersection of the two welds contained cracks similar in appearance to those normally formed when variations in thermal expansion and contraction are encountered when welding dissimilar metals. A microhardness traverse across the weld area...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001054
EISBN: 978-1-62708-214-3
.... The chemistry and structure of the components and all processing procedures met rigid manufacturing specfications. The parts passed proof testing within several weeks after fabrication. Silver solid-state bonding is a versatile method of joining dissimilar metals that are difficult or impossible to join...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001420
EISBN: 978-1-62708-220-4
... between the lining and the basket had played more than a minor part in their development. They arose largely as a result of electrochemical action due to the contact of two dissimilar metals. The solution potential of Monel metal is of the order of −0.17 volts, while that of the steel would probably...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001700
EISBN: 978-1-62708-229-7
... settling on the copper tube surfaces and resulting in the initiation of dissimilar metal corrosion of the copper tubes. The scope for this project did not include an analysis of the waters that were being used in the system. Conclusions Experience in the investigation and analysis of corroded copper...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006828
EISBN: 978-1-62708-329-4
... dissimilar metals Ability to join porous metal components Ability to fabricate large assemblies in a stress-free condition Ability to preserve special metallurgical characteristics of metals Ability to join fiber- and dispersion-strengthened composites Capability for precision production...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001701
EISBN: 978-1-62708-219-8
... at threaded joints appeared to be a result of the thinner pipe wall in the threaded sections. Since a portion of threaded pipe typically extends beyond the joint, pitting or tubercle-induced corrosion is more likely to penetrate the thinner pipe wall at the crevices of the joint. Dissimilar metal corrosion...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006783
EISBN: 978-1-62708-295-2
..., and crevice corrosion can all be exacerbated by galvanic conditions. Galvanic corrosion occurs when two dissimilar conducting materials (metallic or nonmetallic) are in electrical contact with an electrolyte or conducting medium. It usually consists of two dissimilar conductors in electrical contact...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001352
EISBN: 978-1-62708-215-0
... Cracks(fracturing) Dissimilar metals, welding Weld defects Welded joints Welding parameters AFNOR Z30C13 Joining-related failures Handbook of Case Histories in Failure Analysis, Volume 2 Copyright © 1993 ASM International® K.A. Esaklul, editor All rights reserved DOI: 10.31399/asm.fach.v02...
Book Chapter

Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003548
EISBN: 978-1-62708-180-1
.... Galvanic corrosion occurs when two dissimilar conducting materials (metallic or nonmetallic) are in electrical contact. It usually consists of two dissimilar conductors in electrical contact with each other and with a common conducting fluid (an electrolyte), or it may occur when two similar conductors...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c0091362
EISBN: 978-1-62708-220-4
..., it is important to remember that corrosion resistance is not the only criterion when evaluating these new ferritic stainless steels. Welds must also be tough and ductile. Lastly, dissimilar weld filler metals can be successfully used. To avoid premature failure, the dissimilar combination should be corrosion...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001727
EISBN: 978-1-62708-225-9
... with the observations made at Cape Kennedy. The grease was an insulator between the dissimilar metal couples, and it eliminated the galvanic cell reaction. Even bolts heat treated to maximum hardness did not fail as long as the grease remained intact. Nickel-cadmium plating gave inadequate protection because...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001570
EISBN: 978-1-62708-220-4
... if the temperature is sufficiently high. The formation of titanium hydrides becomes significant as the hydrogen content increases above approximately 20 ppm 7 . The hydriding of titanium occurs at higher rates with increasingly higher titanium-dissimilar metal area ratio in the galvanic couple 9...