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chemical conversion coating

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0045926
EISBN: 978-1-62708-235-8
... Abstract A batch of bimetal foil/epoxy laminates was rejected because of poor peel strength. The laminates were manufactured by sintering a nickel/phosphorus powder layer to a copper foil, cleaning, then chromate conversion coating the nickel-phosphorus surface, and laminating the nickel...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006924
EISBN: 978-1-62708-395-9
...Glossary of characteristic cure parameters Table 1 Glossary of characteristic cure parameters Symbol Definition α Chemical conversion (e.g., of epoxide or isocyanate groups), degree of cure α gel α at the gel point t gel Time to gelation, gel time t vit Time...
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
... in the environment; change in the alloy or heat treatment; change in design; use of galvanic protection; use of inhibitors; use of nonmetallic coatings and liners; application of metallic coatings; use of surface treatments, thermal spray, or other surface modifications; corrosion monitoring; and preventive...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001087
EISBN: 978-1-62708-214-3
... examination of wear patterns, chemical analysis of materials, measurement of mechanical properties, and in-place flow tests. It was determined that the proximate cause of failure was cavitation and vortexing between the rotor and the lining. The root cause of the failure was the conversion from lime...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001269
EISBN: 978-1-62708-215-0
...Microhardness Readings Table 1 Microhardness Readings Location distance Hardness, KHN Hardness, HRC (conversion) mm in. 0.025 0.001 917 68 0.050 0.002 842 65 0.076 0.003 907 68 0.102 0.004 863 66 0.127 0.005 907 68 0.254 0.010 1017 >70...
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
... reactions and are most frequently found in chemical process streams. All the aforementioned reactions are quite similar: they consume electrons. The aforementioned partial reactions can be used to interpret virtually all electrochemical corrosion problems. Consider what happens when iron is immersed...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006916
EISBN: 978-1-62708-395-9
...). The conversion percentage pertains to how many reactive groups (i.e., epoxy sites) have reacted with the hardener. Zero percent is the status just after mixing at which point, at time zero, there have been no chemical reactions. As the chemical reactions cause the molecules to grow and crosslink, the conversion...
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
...Chemical analysis of corrosion products on the grate bars Table 1 Chemical analysis of corrosion products on the grate bars Grate bar Composition, mol% Cl − (a) SO 4 − 2 K + Na (b) Ca + Mg + Si K/Na HH:∼2 weeks in service (short exposure) Outer scale...
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
... identified as manganese phosphate conversion coating primer that is shown in detail in Figure 14 . Fig. 11 A (SEM) micrograph shows the presence of “rock candy” intergranular features at the pit. These features are typical of failure resulting from stress corrosion cracking (SCC). 1000× Fig...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.9781627083959
EISBN: 978-1-62708-395-9
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001325
EISBN: 978-1-62708-215-0
... Application Circumstances Loading up to Failure Pertinent Specifications Visual Examination of General Physical Features Performance of other Parts in Same or Similar Service Selection of Specimens Chemical Analysis/Identification Metallography Testing Procedure and Results Surface...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006867
EISBN: 978-1-62708-395-9
... in the polymer that might be detected by analytical methods. Also, in the absence of mechanical stress, the ESC chemical has no discernible effect. Conversely, the magnitude of stress that will cause ESC will not cause fracture if it is imposed in the absence of the stress cracking reagent. Thus, conventional...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006835
EISBN: 978-1-62708-329-4
... of the ingot. These are called scabs, and they usually show up only after rolling or working; as can be expected, they provide a poor surface finish. Imperfections in the ingot can seriously affect the quality and performance of wrought products. The major ingot imperfections are: Chemical...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006939
EISBN: 978-1-62708-395-9
...-ethylene-butylene-styrene-based thermoplastic elastomers containing 0, 1, 3, and 5% ZnO showed significant antimicrobial activity, which decreased upon aging despite not showing any differences in chemical and mechanical properties ( Ref 187 ). Automotive industry, wire and cable coating, medical devices...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006943
EISBN: 978-1-62708-395-9
...) Feature ToF-SIMS XPS Information Molecular weight, chemical bonding, and elemental Chemical bonding, oxidation state, and elemental Quantitative Only with standards Yes, best with standards Minimum analysis size ~2 μm diameter for organic analysis; 50 nm diameter for inorganic analysis...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003524
EISBN: 978-1-62708-180-1
..., and wear failures. The article provides information on the synthesis and interpretation of results from the investigation. Finally, it presents key guidelines for conducting a failure analysis. chemical analysis corrosion failure corrosion testing data collection failure analysis fracture...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006922
EISBN: 978-1-62708-395-9
... Addressing Failure of an Existing Product Metal to Plastic Conversion Additional Reasons for the Material Selection Process Resist Value Engineering Post Material Selection Confirmation of Resin Received by Supplier Finding a Backup Material Case Study: Selecting a New Material after...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001119
EISBN: 978-1-62708-214-3
... in which spring failure can cause total engine destruction. The springs were composed of chromium-silicon steel, with a hardness ranging from 50 to 54 HRC. Chemical composition and hardness were substantially within specification. Failure initiated from the spring inside coil surface. Examination...
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
... Abstract The circumstances surrounding the in-service failure of a cast Ni-base superalloy (Alloy 713LC) second stage turbine blade and a cast and coated Co-base superalloy (MAR-M302) first stage air-cooled vane in two turbine engines used for marine application are described. An overview...
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
... Abstract High-temperature corrosion can occur in numerous environments and is affected by various parameters such as temperature, alloy and protective coating compositions, stress, time, and gas composition. This article discusses the primary mechanisms of high-temperature corrosion, namely...