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corrosion-resistant cast irons

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Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001809
EISBN: 978-1-62708-241-9
... Discussion NAB alloys are known for their excellent corrosion and cavitation resistance, which allows them to be extensively used in numerous seawater applications as impellers, propellers, tubing, etc. NAB alloys have 5–12% aluminum and up to 6% each of nickel and iron. The NAB’s UNS designation...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001165
EISBN: 978-1-62708-234-1
... corrosion resistance. Etching of the core structure showed a selective form of cast iron corrosion (spongiosis or graphitic corrosion) which lowered the strength of the cast iron enough that a knife could scrape off a black powder (10.85% C, 1.8% S, 1.45% P). Analysis showed that some of the “sulfate” found...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0091402
EISBN: 978-1-62708-234-1
... for ferritizing malleable iron. This resulted in lower resistance to erosion and corrosion than pearlitic malleable iron. Recommendations included replacing the elbows with heat-treated fittings with a pearlitic malleable microstructure. Impingement erosion Pearlite Pipe bends ASTM A47 grade 35018 UNS...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001718
EISBN: 978-1-62708-220-4
... material used in casting the impeller. This contaminated surface layer may have adversely affected corrosion resistance. Also noteworthy is the iron-rich debris found in the open-mouth portion of the defect ( Figure 12 ). Iron, if present as ferric chloride (FeCl 3 ), could account for accelerated...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006831
EISBN: 978-1-62708-329-4
... for applications requiring wear resistance. Gray Iron Processing Cupolas, induction furnaces (both coreless and channel induction furnaces), and arc furnaces are used to prepare the molten state required for processing gray cast iron. The economics of the particular situation is the principal factor used...
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
... illustrated in binary alloys that contain phases of differing corrosion potentials. The grain in one phase becomes anodic to grain in the second phase in the microstructure, thus producing an electrolytic cell when the proper electrolyte is present. Another illustration is ductile cast iron, where...
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
... to the other members in the galvanic assembly (for example, zinc anodes in cast iron waterboxes of copper alloy water-cooled heat exchangers). Cathodic protection is often used for the protection of underground or underwater steel structures. The use of cathodic protection for long-term corrosion...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001163
EISBN: 978-1-62708-234-1
... region of bolt in X10 CrNiTi 18 9 that failed by stress corrosion cracking. 8 × Fig. 8 Unetched micro-section of a cracked pump casing of austenitic spheroidal graphite cast iron. 100 × Fig. 9 Scanning electron micrograph of a fracture face from the bolt in Fig. 7 . 400 × Fig...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003508
EISBN: 978-1-62708-180-1
... iron, gray cast iron, malleable irons, ductile iron, low-alloy steel castings, austenitic steels, corrosion-resistant castings, and cast aluminum alloys are the materials discussed. The article describes the general types of discontinuities or imperfections for traditional casting with sand molds...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001109
EISBN: 978-1-62708-214-3
...: modification of the processing parameters to reduce the salt deposition and / or change of bar materials to a more resistant alloy. Castings Fluxing Fused salts Hot gas corrosion Ironmaking Pelleting Sintering furnaces HH UNS J93503 High-temperature corrosion and oxidation Background...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.9781627083294
EISBN: 978-1-62708-329-4
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001202
EISBN: 978-1-62708-234-1
... Abstract Two damaged impellers made of austenitic cast iron came from a rotary pump used for pumping brine mixed with drifting sand. On one of the impellers, pieces were broken out of the back wall in four places at the junction to the blades. The fracture edges followed the shape of the blade...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001058
EISBN: 978-1-62708-214-3
... before machining in order to relieve any residual stresses and coat the surfaces with a corrosion-resistant oxide film. Fig. 5 SEM fractograph of surface of broken cast iron plug. 81×. Fig. 6 Higher-magnification view of center of area shown in Fig. 5 . 243×. Conclusion...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001083
EISBN: 978-1-62708-214-3
... corrosion resistance in a feedwater environment, and because of their higher hardness, they provide improved erosion resistance. Several grades of cast stainless steels are available: CA6NM, CA-15, and CA-40. CA-6NM has the best corrosion resistance, but is the most expensive. CA-40 has the best erosion...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001681
EISBN: 978-1-62708-234-1
... ], containing both sulfidizing and oxidizing gases; also the temperatures are high (e.g., up to 1500 °C) [ 2 ]. Thus the burner must withstand a very aggressive environment, and it is clear that the Co-Cr-Fe alloy casting did not have adequate corrosion resistance to the coal gasification combustion environment...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001683
EISBN: 978-1-62708-234-1
... into the austenitic cast structure. Weld filler alloy usually contains a higher chromium content, both to enhance general corrosion resistance and to enhance ferrite retention in the weld. The latter results in improved toughness and resistance to hot cracking, factors important with regard to weld performance...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001712
EISBN: 978-1-62708-234-1
... 2 indicate nitridation resistance to be increased with increasing nickel content. Cobalt is also referred to as a nitridation reducing element by Lai 1 . Chromium, aluminium, titanium and iron are all expected to decrease resistance to nitridation due to their ability to form nitrides...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001820
EISBN: 978-1-62708-241-9
... cracking. Based on test data and cost, A217-WC9 cast Cr–Mo steel would be a better alloy for the application. valve body corrosion H2S exposure Cr-Mo steel pitting cracks chemical analysis corrosion resistance A216-WCC (cast carbon steel) UNS J02503 A217-WC9 cast Cr–Mo steel UNS K21590...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0006899
EISBN: 978-1-62708-225-9
... Abstract Type 410 stainless steel bolts were used to hold together galvanized gray cast iron splice case halves. Before installation, the bolts were treated with molybdenum disulfide (MoS 2 ) antiseize compound. Several failures of splice case bolts were discovered in flooded manholes after...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c9001638
EISBN: 978-1-62708-228-0
... and/or aluminum to form a protective layer of chromium or aluminum oxide (Cr 2 O 3 or Al 2 O 3 ) scale to resist oxidation and other forms of high-temperature corrosion. These oxide scales are slow growing. When an alloy is under sulfidation attack, sulfides of chromium, iron, and nickel are likely to form...