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Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001387
EISBN: 978-1-62708-215-0
... Abstract Nickel anodes failed in several electrolysis cells in a heavy-water upgrading plant. Dismantling of a cell revealed gouging and the presence of loosely attached black porous masses on the anode. The carbon steel top, plate was severely corroded. An appreciable quantity of black powder...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0006402
EISBN: 978-1-62708-217-4
..., H2SO4 anodized, and coated with MIL-C-27725 integral fuel tank coating on the rib side. Scanning electron microscopy and microprobe analysis (both conventional energy-dispersive and Auger analyzers) showed that the anodic coating was applied over an improperly cleaned and contaminated surface...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0046022
EISBN: 978-1-62708-217-4
... Abstract A forged aluminum alloy 2014-T6 catapult-hook attachment fitting (anodized by the chromic acid process to protect it from corrosion) from a naval aircraft broke in service. Spectrographic analysis, visual examination, microscopic examination, and tensile analysis showed minute cracks...
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Published: 01 January 2002
Fig. 8 Cathodic protection of a buried pipeline using a buried magnesium anode. Source: Ref 6 More
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Published: 01 January 2002
Fig. 30 Anodic polarization behavior of an active-passive alloy with grain-boundary depleted zones More
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Published: 01 January 2002
Fig. 2 Schematic diagram of a generic corrosion cell showing anodic oxidation of the metal ( M ) complemented by cathodic reduction of an electron acceptor ( X ). The corrosion rate can be controlled by the rate of arrival of X at the cathodic surface, a buildup of metal ions, M More
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Published: 15 January 2021
Fig. 25 Cathodic protection of a buried pipeline using a buried magnesium anode. Source: Ref 13 More
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Published: 15 January 2021
Fig. 30 Anodic polarization behavior of an active-passive alloy with grain-boundary depleted zones. SCE, saturated calomel electrode More
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Published: 15 January 2021
Fig. 10 Interfacial regions are generally more anodic due to the presence of defect and misfit strains, which have higher strain energy and are preferential sites for corrosion. (a) Grain boundaries are more anodic than grains and thus more prone to corrosion. (b) Interphase boundaries More
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Published: 15 January 2021
Fig. 14 Schematic of the actual and effective focal spots of an anode that is inclined at 20° to the centerline of the x-ray beam More
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Published: 15 January 2021
Fig. 16 Types of anode targets in x-ray tubes. (a) Transmission type. (b) Reflection type. (c) Rotating reflection type More
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Published: 01 December 1993
Fig. 2 Anode assembly and corroded steel plate More
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Published: 01 December 1993
Fig. 3 Typical damage to the nickel anodes. (a) Initiation of the process. (b) and (c) Badly damaged anodes More
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Published: 01 December 1993
Fig. 4 EDX spectra. (a) Unaffected nickel anode surface. (b) Outer surface of gouged anode. (c) Inner surface of gouged anode More
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Published: 01 June 2019
Fig. 3 Hydrogen-stress cracking of type 410 stainless steel bolts. (a) Quenched from 1010 to 65 °C (1850 to 150 °F) in oil, then tempered at 535 °C (1000 °F) for 1 h. Bolt exposed in 5% H 2 SO 4 solution and 1 m/L/L Rodine inhibitor as cathode with platinum anode. Applied current: 180 mA/2 More
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Published: 01 June 2019
Fig. 1 Aluminum alloy 7075-T6 aircraft wing panel (a) showing unusual surface appearance. (b) SEM of the panel surface showing cracked anodized coating. 160x. (c) SEM showing the anodized coating flaking away and corrosion deposit under the coating. 85x. (d) Cross section of corrosion site More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c0047606
EISBN: 978-1-62708-228-0
... and with a SEM in the laboratory. The examinations revealed a combination of failure mechanisms. The pitting failure of the welds was attributed to localized attack of an activated surface, in which anodic pits corroded rapidly. Additionally, SCC driven by residual welding stresses occurred in the base metal...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c0091358
EISBN: 978-1-62708-233-4
... used in the valve. Manganese sulfide stringers in the valve were exposed at end-grain surfaces in contact with the beverage. The stringers, which were anodic to the surrounding metal, were subject to corrosion, producing a hydrogen sulfide concentration in the immediately adjacent liquid...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001673
EISBN: 978-1-62708-227-3
... Abstract The failure of a 90-10 cupronickel heat exchanger tube resulted in flooding of the vessel and subsequently sinking it. The corrosion of the cupronickel alloy was facilitated by the high sulfur content of the seawater in which it operated. The failure modes were anodic dissolution...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0047939
EISBN: 978-1-62708-225-9
... and roller) were revealed to be uniformly electrolytically etched by visual examination. The action similar to anodic etching was believed to have occurred as a result of stray currents in the electric motor (not properly grounded) and the presence of an electrolyte (moisture) between the cup and roller...