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hot-dip coatings

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001215
EISBN: 978-1-62708-235-8
... alloy formation. Even in the case of steel parts with lower silicon contents the reaction between iron and zinc can continue until the pure zinc layer has been consumed entirely if the work piece is not cooled sufficiently after withdrawal. Coating defects Galvanized steels Hot dip galvanizing...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003549
EISBN: 978-1-62708-180-1
... corrosion-resistant properties to a passive surface film. The naturally occurring passive film is usually enhanced with immersion in a hot nitric acid solution or steam. For example, stainless steel surgical implants develop this passive layer when the implants are sterilized in steam. The exact nature...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001812
EISBN: 978-1-62708-180-1
... attack on fracture surface 4 41–42 Coated (b) Bolt completely failed in test fixture Not applicable Heavy corrosion on fracture surface (a) After 3 months of intermittent dipping in a 3.5% NaCl solution. (b) Coated with an antiseizure compound consisting of metallic copper flakes...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006805
EISBN: 978-1-62708-329-4
... in an acidified solution of 3.5% NaCl. Intermittent dipping consisted of a 10 min total immersion and a 50 min air dry for 8 h per day, 5 days per week, for 3 months. After 3 months of testing, the coated bolt having a hardness of 41 to 42 HRC fractured completely across at the third thread from the head...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001100
EISBN: 978-1-62708-214-3
... of a hot-dip galvanized coating. The long leg of the as-fractured bolt extended 448 mm (17.6 in.) from the bend area. The short leg extended 67 mm (2.6 in.) from the bend. The diameter of unthreaded leg regions was measured to be 18 mm (0.7 in.). The small radius dimension near the fracture locations...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001656
EISBN: 978-1-62708-219-8
... to sinusoidal load fluctuations at 6.7 Hz in air, 3% NaCl solution, and natural sea water are described. Reinforcement types studied included: hot-rolled mild steel bar, hot-rolled alloyed high strength bar, cold-worked high strength bar, galvanized bar of all these three types, nickel-clad bar and epoxy-coated...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001397
EISBN: 978-1-62708-235-8
... discovering any features which may have led to the stress-corrosion cracking. Further, the tin coating had been applied by dipping and not by an electrolytic process which may cause embrittlement in some materials. The fact that there was no general cracking tended to confirm the view that re-tinning...
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
.... It then becomes a matter of selecting alloys or coatings that are cost effective. Two strategies to alleviate this hot corrosion problem are possible. One is to change the processing parameters to reduce the salt deposition on the grate bars, for example, by removing the salt-forming impurities from the flux...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006782
EISBN: 978-1-62708-295-2
..., stainless steel owes its corrosion-resistant properties to a passive surface film. The naturally occurring passive film is usually enhanced with immersion in a hot nitric acid solution or steam. For example, stainless steel surgical implants develop this passive layer when the implants are sterilized...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c0046911
EISBN: 978-1-62708-227-3
... along elongated ferrite bands, possibly because silicon was dissolved in the ferrite and thus made it more susceptible to attack by the molten zinc. Recommendations included rewelding the vat using the manual shielded metal arc process with at least four passes on each side. Hot dip galvanizing...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003555
EISBN: 978-1-62708-180-1
... and metal dusting, sulfidation, hot corrosion, chloridation, hydrogen interactions, molten metals, molten salts, and aging reactions including sensitization, stress-corrosion cracking, and corrosion fatigue. It concludes with a discussion on various protective coatings, such as aluminide coatings, overlay...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001145
EISBN: 978-1-62708-217-4
... Abstract Cartridge-pneumatic starter systems are used on military aircraft. In the cartridge mode used for alert starts, the starter turbine is driven by hot gases produced through the controlled burning of a solid propellant cartridge within a closed chamber (the breech chamber/cartridge...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006787
EISBN: 978-1-62708-295-2
... oxidation, carburization, metal dusting, nitridation, carbonitridation, sulfidation, and chloridation. Several other potential degradation processes, namely hot corrosion, hydrogen interactions, molten salts, aging, molten sand, erosion-corrosion, and environmental cracking, are discussed under boiler tube...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003509
EISBN: 978-1-62708-180-1
... at the weld toe Cracks—hot or cold, longitudinal or transverse, crater and at weld toe Gas porosity Arc strike Spatter Backing piece left on: failure to remove material placed at the root of a weld joint to support molten weld metal Subsurface features that are causes for rejection...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001832
EISBN: 978-1-62708-241-9
..., the lack of failures during installation, and the inhibitive effect of oxygen. It is possible that the metal could have embrittled during the hot dip galvanizing process, thereby facilitating crack initiation and growth during stressing. It is more likely, however, that the metal could be embrittled...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003507
EISBN: 978-1-62708-180-1
... operations are also classified as either primary metalworking (where mill forms such as bar, plate, tube, sheet, and wire are worked from ingot or other cast forms) or secondary metalworking (where mill products are further formed into finished products by hot forging, cold forging, drawing, extrusion...
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
... angles and cores) Metal penetration D 224 Fragment of mold material embedded in casting surface Dip coat spall, scab D 230: Plate-like metallic projections with rough surfaces, usually parallel to casting surface D 231 (a) Plate-like metallic projections with rough surfaces...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006778
EISBN: 978-1-62708-295-2
... • Overload zone consistent with applied loading direction • Ratchet marks where origins join • Multiple brittle-appearing fissures • External surface and internal fissures contain reaction scale coatings • Fracture after limited dimensional change Scanning electron microscopy, 20–10,000× (fracture...
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
... in D 223 Conglomeration of strongly adhering sand and metal at the hottest points of the casting (re-entrant angles and cores) Metal penetration D 224 Fragment of mold material embedded in casting surface Dip coat spall, scab D 230 Plate-like metallic projections with rough surfaces...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003554
EISBN: 978-1-62708-180-1
... fracture of the axle when a critical size was reached. Carbon or Alloy Steel and Zinc There are occasional anecdotal reports of steel components fracturing when immersed in a hot dip galvanizing bath. These failures are believed to be associated with high hardness and high residual stresses often...