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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
... 304 stainless steel tubes. Visual and stereoscopic examination revealed three types of corrosion on the inside surfaces of the tubes: uniform attack, deeper localized corrosive attack, and accelerated uniform attack. Metallographic analysis indicated that pronounced dissimilar-metal corrosion had...
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
... of failure to make 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...
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
.... It was recommended that the design be modified to avoid dissimilar metal combinations of high corrosion potential. Airplanes Steels Transition joints 7014 UNS A97014 Stress-corrosion cracking Background Visual Examination of General Physical Features Testing Procedure and Results Discussion...
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
... that the cracks propagated by stress-corrosion cracking. The cause of cracking was twofold: use of interference-fit fasteners exposed to moisture intrusion from a marine environment and poor hole quality. Failure was intensified by dissimilar-metal contact in the presence of weak acidic electrolyte (dissociated...
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
... temperature, conditions are not considered strongly conducive to corrosion, although atmospheric moisture could be present within such a system. However, very little moisture is required in such a dissimilar metal crevice as in this case study for sufficient hydrogen to be generated to produce the degree...
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
... to premature failure by stress-corrosion cracking under sustained loading if the atmosphere was saturated with water vapor. Dissimilar metals, bonding Pressure welding Stainless steels, bonding Welded joints, corrosion Silver Stress-corrosion cracking Background Testing Procedure and Results...
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
... heaviest, between the martensite band and the duplex structure, the structure was probably austenitic. These phase changes are predicted from the Schaeffler diagram (in the article “Hardfacing, Weld Cladding, and Dissimilar Metal Joining” in Welding, Brazing, and Soldering , Volume 6 of the ASM...
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
..., 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 revealed a base metal average hardness of 89 HRB. The hardness...
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
... of corrosion. Uniform attack, pitting, 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...
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
... Joints , J. Fail. Anal. Prevent. , Vol 5 , 2005 , p 55 – 60 , 10.1361/15477020522960 16. Miller B.A. , Swartzentruber P.D. , and Barnes J.T. , Failure of a Dissimilar Metal Braze in an Expansion Joint , J. Fail. Anal. Prevent. , Vol 19 , 2019 , p 314 – 319 , 10.1007...
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.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 Acknowledgments Selected Reference Selected Reference...
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.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 Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001727
EISBN: 978-1-62708-225-9
... of graphite in grease (Lox-Safe) was applied at the stainless-aluminum interface, there were no failures after 1,000-hr exposure — again consistent 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...
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
... processing equipment Cracks(fracturing) Dissimilar metals, welding Weld defects Welded joints Welding parameters AFNOR Z30C13 Joining-related failures Background Visual Examination of General Physical Features Testing Procedure and Results Discussion Conclusion and Recommendations...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001385
EISBN: 978-1-62708-215-0
..., and loosening described above. Over the years, improvements have been made in the electrical components used with aluminum wiring to provide more secure mechanical clamping, and therefore, a connection of minimal electrical resistance. Galvanic effects between dissimilar metals are also a concern...
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
... to form hydrides 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...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001824
EISBN: 978-1-62708-241-9
... that the internal bolts of the water injection pump failed by galvanic corrosion at the side exposed to the environment and that chloride stress-corrosion cracking occurred at the thread roots. Dissimilar metals or alloys, namely austenitic stainless steel for the bolts coupled with the nickel-base alloy...