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polarization analysis

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001560
EISBN: 978-1-62708-217-4
... both combustion products from the cartridges and corrosion products from the chamber, were analyzed using elemental analysis and x-ray diffraction techniques. Electrochemical polarization techniques were also utilized to estimate corrosion rates. Aerospace engines Aircraft components Breech...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001525
EISBN: 978-1-62708-220-4
... cleaning Storage tanks 1006 UNS G10060 Uniform corrosion Metalworking-related failures Introduction After defining the cause of failure by laboratory analysis, most often corrective measures can be established. However, additional laboratory tests are sometimes needed, first to recreate...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001004
EISBN: 978-1-62708-229-7
...Abstract Abstract The results of a failure analysis of a series of Cr-Mo-V steel turbine studs which had experienced a service lifetime of some 50,000 h are described. It was observed that certain studs suffered complete fracture while others showed significant defects located at the first...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001162
EISBN: 978-1-62708-220-4
... be differentiated. The sections were therefore examined unetched in polarized light. The microstructure of the cracked tubes was shown to have much smaller grains than the ductile and showed cracks from the surface down along the grain boundaries. Material hardness also differed between the unusable tubes...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001769
EISBN: 978-1-62708-241-9
... current between control and bacterial inoculated system. Fig. 8 Polarization behavior for mild steel in the absence and the presence of calcium precipitating bacteria (anodic and cathodic curve) in cooling water system Impedance spectroscopy analysis is presented in Fig. 9 and Table 4...
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
...Abstract Abstract A group of control valves that regulate production in a field of sour gas wellheads performed satisfactorily for three years before pits and cracks were detected during an inspection. One of the valves was examined using chemical and microstructural analysis to determine...
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
.../matrix disbonds associated with them. And although the exact nature of the anomaly could not be determined by direct methods, indirect evidence, including polarizing light effects, FTIR analysis, fractographic data, and examination of humidity-aged specimens, indicated that the resin anomaly...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001066
EISBN: 978-1-62708-214-3
... of HNO 3 also were present in the process stream. Circumstances Leading to Failure The pipe was removed from the system after cracks were observed in the painted coating. Sample Selection The entire 460 mm (18 in.) length of spool piece was sent for analysis. Testing Procedure...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001252
EISBN: 978-1-62708-235-8
... microscopic examination of microsections, a coarse-meshed net of fine precipitates was found ( Fig. 7 ). They were in part transparent and were illuminated four times while turning 360° in polarized light between crossed Nicols. Thus they were anisotropic, i.e. not glassy or of cubic structure ( Fig. 8...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001095
EISBN: 978-1-62708-214-3
...Abstract Abstract A 20 ton polar crane motor fell during a 3400 kg (7500 lb) lift, narrowly missing personnel working beneath the crane. Witnesses reported that the motor fall was preceded by a falling oil mass, and it was believed that the motor was intact prior to impact. The maintenance...
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
... by rapid leaking. The original author had failure analysis experience with a similar, seawater-filled fire main piping system in a high-performance hydrofoil ship, two decades earlier. Investigation The following design and parameters were revealed in investigation of the failure: Piping...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001068
EISBN: 978-1-62708-214-3
... of solution-annealed type 304L stainless steel. 142.2×. Chemical Analysis/Identification The chemical composition of the tank material was as follows: 0.024% C, 18.00% Cr, 10.23% Ni, 1.10% Mn, 0.65% Si, 0.028% P and 0.015% S, with the balance iron. Samples of water collected from the tanks were...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001661
EISBN: 978-1-62708-229-7
... to find discontinuities, metallurgical evaluation of the discontinuities, analysis of any failure modes, and determination of the best repair techniques. The welds were made with prequalified joints in accordance with AWS D1.1-77 and required only visual inspection. More sensitive inspection methods were...
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
.... This article addresses those forms of corrosion that contribute directly to the failure of metal parts or that render them susceptible to failure by some other mechanism. In particular, mechanisms of corrosive attack for specific forms of corrosion are described. Other articles in this Volume discuss analysis...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001113
EISBN: 978-1-62708-214-3
... revealed a toe-weld HAZ crack emanating at point A and propagating across the plate base metal to point B, another toe-weld HAZ area. Point A, when viewed at 65× using polarized dark-field lighting, revealed primer paint (light gray) in the crack. Chemical Analysis/Identification Material Results...
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
... in this Volume discuss analysis and prevention of several types of failures in which corrosion is a contributing factor. These articles include “ Stress-Corrosion Cracking ,” “ Liquid Metal and Solid Metal Induced Embrittlement ,” “ Hydrogen Damage and Embrittlement ,” “ Corrosive Wear Failures ,” “ Biological...
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
... corrosion rates. The presence of Fe 3+ polarizes the zirconium surface to a potential exceeding the pitting potential, which leads to localized breakdown of the protective passive film and corrosion pitting. 2 Fig. 11 EDS chemical analysis of the black deposit within a linear defect reveals high...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001727
EISBN: 978-1-62708-225-9
...: the secondary effect of galvanic coupling, hydrogen embrittlement. Bolts Galvanic corrosion Spacecraft 17-4 PH UNS S17400 Hydrogen damage and embrittlement Fig. 1 Success of the mission depends greatly on the reliability of high-strength stainless steel fasteners. Analysis of service...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001070
EISBN: 978-1-62708-214-3
... effect of very small amounts of copper sulfate on the passivity of type 316 stainless steel had been recognized and studied in the laboratory. At the time of manufacture, the literature indicated that type 316L was resistant to 0.1% sulfuric acid at 80°C (175°F), based on Ref 1 . Polarization had...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006763
EISBN: 978-1-62708-295-2
...Abstract Abstract Failure analysis is an investigative process that uses visual observations of features present on a failed component fracture surface combined with component and environmental conditions to determine the root cause of a failure. The primary means of recording the conditions...