1-20 of 202 Search Results for

chemical activity

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c9001498
EISBN: 978-1-62708-218-1
... approximately 20% austenite near the surface. Surface structure: At the pitted area low on the active profile, evidence of catastrophic movement of material away from the pitchline and toward the root. (An identical example is shown in Fig. 4-15.) Chemical Analysis Carbon, 0.12%; manganese, 0.82...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001502
EISBN: 978-1-62708-234-1
... hardening specifications. The mode of failure was tooth profile spalling. By definition, spalling originates at a case/core interface or at the juncture of a hardened/nonhardened area. The cause of this failure was either insufficient or no induction-hardened case along the active profile. The cause...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003556
EISBN: 978-1-62708-180-1
..., electrons released by the oxidation of metals are used directly in microbial metabolism. In other cases, it is the chemicals and conditions created by microbial activity that promote MIC. Secondary effects can also be important. These include such things as the biodegradation of lubricants and protective...
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: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006788
EISBN: 978-1-62708-295-2
... forms. Nitrate-reducing bacteria (NRB), nitrite-reducing bacteria, nitrifying bacteria, nitrogen-fixing bacteria, and so on all actively convert one nitrogen chemical species to another in the nitrogen cycle. Ammonium, nitrate, and nitrite can be linked to cracking and/or corrosion under various...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001064
EISBN: 978-1-62708-214-3
... View of new stainless steel chemical plant. Fig. 2 External clamping used to stop leaks. Abstract Several hundred leaks were reported in the type 304 stainless steel pipelines, vessels, and tanks of a chemical plant at a tropical location within a few weeks after startup...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0090881
EISBN: 978-1-62708-229-7
... the conclusion that that the deposits formed at locations that experienced steam blanketing or dryout at the higher levels of the steam generators. Recommendations included steam generator water-chemistry controls, chemical cleaning, and reduction of the primary reactor coolant system temperature. Electric...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001779
EISBN: 978-1-62708-241-9
... mechanisms ( Fig. 3 ) [ 10 ]. These fabrication defects not only might be active zones for farther defects such as corrosion and erosion but also produce extra pressures on pump which might result in operational problems that could speed up cavitation phenomenon [ 9 ]. According to chemical analyses...
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
... is the evolution of hydrogen gas according to Eq 4. This also applies to corrosion in other acids, such as sulfuric, phosphoric, and hydrofluoric, and water-soluble organic acids, such as formic and acetic. In each case, only the hydrogen ion is active; the other ions, such as sulfate, phosphate, and acetate, do...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001648
EISBN: 978-1-62708-234-1
...) shown seated at flanged end of section of pump housing The operating environment for the pump shaft was fresh water. The water was untreated, with the exception of a biocide used to control freshwater mussels and inhibit fouling of the water delivery and distribution system. The active ingredient...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001775
EISBN: 978-1-62708-241-9
... intense corrosive activity, SCC, and/or hydrogen-induced cracking of Monel 400. Failures of this alloy can be grouped in four categories: The chemical composition of the tube is presented in Table 2 , along with the alloy composition specified for Monel 400 according to ASTM B 366-95b. As shown...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c0091394
EISBN: 978-1-62708-227-3
..., and imperfections, as well as some chemical differences from welding products. The rough and irregular morphology of welds that have not been ground flat provides sites that are easily activated for pitting and hard to completely passivate. The pipe and irregular welded surface, especially if porous and if slag...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0006387
EISBN: 978-1-62708-217-4
... Abstract A routine examination on a seat ejection system found that the catapult attachment swivel fabricated from 7075-T651 aluminum alloy plate contained cracks on opposite sides of the part. This swivel, or bath tub, does not experience extreme loads prior to activation of the catapult...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0047975
EISBN: 978-1-62708-225-9
... by contact fatigue mechanism (flaking) activated by the subsurface nonmetallic inclusions. Aircraft components Bearing races Flaking Transmissions (sutomotive) Bearing steel Fatigue fracture Rolling-contact wear The pilot of an aircraft reported illumination of the transmission oil-pressure...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006866
EISBN: 978-1-62708-395-9
.... Production data are derived from Ref 2 , 5 , and 6 . Information on enzymes was extracted from references given in Tables 2 and 3 Currently known bacteria and fungi that produce active polyethylene terephthalate hydrolases Table 2 Currently known bacteria and fungi that produce active...
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
... of hydrogen gas according to Eq 4 . This also applies to corrosion in other acids such as sulfuric, phosphoric, hydrofluoric, and water-soluble organic acids such as formic and acetic. In each case, only the hydrogen ion is active, the other ions such as sulfate, phosphate, and acetate do not participate...
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
... to generalized uniform chemical attack—described in the section “Uniform Corrosion” —in which the anodes and cathodes of the cells are numerous, small, and close together. The analysis of corrosion failures and the development of suitable corrective measures require not only a basic understanding...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001336
EISBN: 978-1-62708-215-0
... atomic number 4. The vertical scales represent x-ray counts per unit time, and thousands of electron volts. Metallography and chemical analysis confirmed that the sued new stock austenitic stainless steel pipe flange assemblies failed because of an austenite-martensite galvanic couple activated...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006938
EISBN: 978-1-62708-395-9
.... Abstract A design may be improvable without presenting an unacceptable risk related to safety or performance. However, design-related failures can result from an oversight in performing one of the major design activities or from a failure to balance the competing demands inherent to part design...