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Coating defects

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001589
EISBN: 978-1-62708-235-8
...Abstract Abstract The paper discusses the analysis of a coating defect on a high phosphorus electroless nickel (Ni-11 wt. % P) deposit plated on an aluminum alloy substrate. Preliminary investigations had indicated that the elongated defects were possibly caused by the entrapment of long fibers...
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 Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c9001625
EISBN: 978-1-62708-218-1
... from contact with a ferrous material, such as a steel chip. Chemical analysis Coating defects Discoloration Motorcycle components Polymer (Other, miscellaneous, or unspecified) failure Two acrylic-coated polymeric motorcycle components exhibited fisheye blemishes after painting. Only...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001765
EISBN: 978-1-62708-241-9
... impoundment under the tank bottom along the periphery inside the ring wall and failure of water side epoxy coating. Various measures to prevent such failures in the future are recommended. water storage tank corrosion coating defects carbon steel pitting and holes EDX analysis coating thickness...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0047169
EISBN: 978-1-62708-217-4
... took off and was thus available for examination. Failure occurred after 37 landings (about 298 roll km, or 185 roll miles). Examination of the fracture surfaces revealed that a forging defect was present in the wall of the wheel half. The anodized coating showed distinct twin-parallel and end-grain...
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
... edges or contours due to poor mold repair or careless application of wash coatings Defective coating (tear-dropping) or poor mold repair E 120: Serious variations from pattern shape E 121 Casting incomplete due to premature solidification Misrun E 122 Casting incomplete due...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001657
EISBN: 978-1-62708-227-3
... assessment purposes. Metallographic samples are first examined in the unetched condition to study the distribution of primary carbides, sulphocarbides, inclusions and various forms of casting defects. Coated components are also best suited for an unetched microstructural examination, since coating...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0090994
EISBN: 978-1-62708-225-9
... that the springs failed during installation due to the presence of preexisting defects. Crack surfaces were found to be corroded and phosphate coated, indicating that the cracks occurred during manufacture. Installation, which presumably entailed some axial extension, resulted in ductile overload failure...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003563
EISBN: 978-1-62708-180-1
... available deposition conditions were used to deposit the PVD coatings listed in Table 2 , it is worth appreciating that these are not entirely defect-free coatings, and further improvements in RCF performance of PVD coatings can be realized by improved coating microstructure.) The interfaces between...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001517
EISBN: 978-1-62708-217-4
...Abstract Abstract The purpose of this investigation was to determine the cause of the ultrasonic signal attenuation noted during an inspection of a composite aircraft component. Although ultrasonics was able to identify the location of the defective areas, destructive analysis had...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001504
EISBN: 978-1-62708-217-4
... with aluminum alloys. Very few overload failures were noted. A number of causes were identified: design deficiencies and manufacturing defects leading mainly to fatigue failures, and poor materials selection and improper maintenance as the principal causes of corrosion-related failures. The survey showed...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001706
EISBN: 978-1-62708-217-4
... procedures , pt. 1 20-60-00, ( 1994 ) 4. Canadian Specification 31-GP-103M , “Conversion Coating, Heavy Phosphate For Iron And Steel.” , ( 1989 ) 5. ASTM-D-3359 , Standard Test Methods for measuring Adhesion by Tape Test , ( 1990 ) 6. Military Specification MIL-C-16173E , Corrosion...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001820
EISBN: 978-1-62708-180-1
...Types of defects that can cause pipeline failures Table 1 Types of defects that can cause pipeline failures Causes of preservice test failures Defects in the pipe body Mechanical damage Fatigue cracks Material defects Longitudinal weld defects Submerged arc...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001803
EISBN: 978-1-62708-241-9
... with the presence of superficial manufacturing routes. As a result of the analysis of various implant materials, the main reasons for failure are corrosive attack, manufacturing defects, and nonstandard-caused failures. Biocompatible inorganic materials, such as hydroxyapatite coating with some binders, would...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001822
EISBN: 978-1-62708-241-9
... in., and the wall thickness is 0.467 in. The pipes were manufactured by a qualified pipe mill in Saudi Arabia. The steel coils used for manufacturing of pipes were procured from a local steel mill. The total transportation distance from the pipe mill to the coating yard and then to the site was about 110 km...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001907
EISBN: 978-1-62708-217-4
...Abstract Abstract Aircraft missile launcher attachment bolts fabricated from cadmium-coated Hy-tuf steel were found broken. Subsequent analysis of the broken bolts indicated three causes of failure. First, the bolts had been carburized, which was not in conformance with the heat treating...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c0089617
EISBN: 978-1-62708-232-7
... sticking to the bore surface. Recommendations included reducing the pouring temperatures of the molten metal and spraying a thicker insulating coating onto the mold surface. Centrifugal casting Foundry practice Molds Overheating 4130 UNS G41300 Casting-related failures The forged 4130...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001265
EISBN: 978-1-62708-215-0
...Abstract Abstract Total knee prostheses were retrieved from patients after radiographs revealed fracture of the Ti-6A1-4 VELI metal backing of the polyethylene tibial component. The components were analyzed using scanning electron microscopy. Porous coated and uncoated tibial trays were found...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.rail.c9001392
EISBN: 978-1-62708-231-0
...Abstract Abstract Following leakage which developed within the furnace of a horizontal multi-tubular type boiler, examination revealed a series of cracks adjacent to the stiffening rings in the first plain furnace ring. The fire-side surface of the sample was coated with a layer of oxide scale...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001827
EISBN: 978-1-62708-241-9
...). The observations and coating thickness measurements revealed that the coating was generally in good condition and did have defects other than the previously discussed corrosion cavities. The chemical composition (measured using wet methods) of the base material was consistent with the specification...