1-20 of 156 Search Results for

flow-accelerated corrosion

Sort by
Image
Published: 15 January 2021
Fig. 52 Carbon steel pipe sections exhibiting surface pattern (scalloped, orange-peel) typically observed on components subject to deterioration due to flow-accelerated corrosion More
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
... Handbook , 2003. Galvanic Corrosion Although sometimes considered a form of corrosion, galvanic corrosion is more accurately considered a type of corrosion mechanism, because galvanic action is the basis for, or can accelerate the effects of, other forms of corrosion. Uniform attack, pitting...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001082
EISBN: 978-1-62708-214-3
... constructed. It was determined that the blades failed by fatigue that had been accelerated by stress-corrosion cracking. The mechanism of failure was flow-induced vibration, in which the vortex-shedding frequencies of the blades were attuned to the natural frequency of the blade/hub configuration. A number...
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
... temperatures. The pipe was in service for four weeks when three leaks appeared. Investigation (visual inspection and photographic images) supported the conclusion that the failure was caused by attack and corrosion damage of Cl ions in conditions that were ideal for three modes of highly accelerated pitting...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0048714
EISBN: 978-1-62708-229-7
... analysis of the tube confirmed that the material was copper alloy C44300 (arsenical admiralty metal). Fig. 1 Copper alloy C44300 heat-exchanger tube that failed by impingement corrosion from turbulent flow of air and condensate along the shell-side surface. (a) Shell-side surface of tube showing...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0091727
EISBN: 978-1-62708-217-4
... film. It was learned that minor changes in the testing procedures could inhibit or accelerate the reaction. For example, the addition of 1% H 2 O inhibited the reaction completely. It could be restarted by a 5 ppm addition of chloride. Initial stress-corrosion testing in the laboratory was performed...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001276
EISBN: 978-1-62708-215-0
... Piping Turbulent flow Wall thickness Carbon steel Erosive wear Velocity-affected corrosion Erosion - corrosion Background Wall thinning and leaking were plaguing the feedwater piping in a waste-to energy plant ( Fig. 1 ). Following the initial leaks, the piping was analyzed by the boiler...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0006406
EISBN: 978-1-62708-217-4
... was in the T-6 heat treat condition. Conclusions It was concluded that the cracking of the flange occurred by a combination of stress corrosion and fatigue. The cracking was accelerated because of an inadvertent fit up stress during installation. The age of the crack could not be established. However...
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
.... Cavitation erosion is the accelerated attack caused by the synergistic effects of: (1) cavitation damage to the metal surface and protective oxide film; (2) erosion due to relative motion between the metal surface and the liquid; and (3) corrosion of the exposed base metal. Figure 3 shows the surface...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001486
EISBN: 978-1-62708-234-1
... proud. (├Ś400). R. W. Wall, in one of the papers in the symposium previously mentioned, refers to laboratory experiments, the results of which indicated that corrosion at metal surfaces is accelerated by vibration and, in the case of iron in water, corrosion occurs in the form of isolated pits...
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
... considered a form of corrosion, galvanic corrosion is more accurately considered a type of corrosion mechanism, because galvanic action is the basis for, or can accelerate the effects of, other forms of corrosion. Uniform attack, pitting, and crevice corrosion can all be exacerbated by galvanic conditions...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001616
EISBN: 978-1-62708-229-7
... for local pitting bursting. Nonuniform heat transfer in Stage 3 operation accelerated the selective corrosion of front-end tubes. The relatively high heat transfer in this stage resulted in condensation of some corrosive gases and consequent corrosion. Continuous operation of the plant with some precautions...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0046422
EISBN: 978-1-62708-234-1
...) or by the discontinuity of the water-discharge slot. It could also be argued that the acceleration forced on the water in the rotor, which makes the flow hug one side of each rotor pocket, causes a rotating discontinuous pattern of streams to emerge from the rotor, which then produces discrete liquid impacts...
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
... acceleration of corrosion on copper is the result of incorporation of EPS into the copper oxide on the metal surface ( Ref 38 ). This disrupts the passivating film and is accompanied by a reduction in pH due to metabolic activity. In a more complex example, 316L stainless steel exposed to a flowing microbial...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006794
EISBN: 978-1-62708-295-2
... by the simultaneous action of the other. Erosion-corrosion occurs when a target surface is subject to impingement of solid particles in a flowing corrosive liquid or slurry ( Ref 4 , 5 ). This is a common surface failure mode for components, such as pumps, pipelines, valves, and flotation cells, in facilities...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001234
EISBN: 978-1-62708-232-7
... joints Turbulent flow Copper pipe Joining-related failures Erosion - corrosion A general view of the specimen under examination from a copper hot water system is shown in Fig. 1 in the as supplied condition. As can be seen from the photograph, a bent pipe has been soldered into a straight pipe...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006825
EISBN: 978-1-62708-329-4
...-through type, wherein the water and steam flow through the boiler circuitry only once. Figure 1 explains the basic difference between the functioning of a subcritical and a supercritical boiler. Fig. 1 Schematic showing difference in functioning of subcritical and supercritical boilers...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003568
EISBN: 978-1-62708-180-1
..., and exposing new reactive surfaces that are anodic to uneroded neighboring areas on the surface. This results in rapid localized corrosion of the exposed areas in the form of smooth-bottomed shallow recesses. Nearly all flowing or turbulent corrosive media can cause erosion-corrosion. The attack may...
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
.... For example, piping containing fluid may experience unique flow conditions that may result in erosion-corrosion failures. In that case, sections of pipe of different alloys may be placed on line and monitored. Other common methods of testing include accelerated tests, simulated or pilot testing...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001389
EISBN: 978-1-62708-215-0
... to be a corrosion layer that resulted from exposure to ammonia in a humid atmosphere. Simulation tests confirmed that ammonia was the corrodent. The ammonia originated from the phenolic molding area of the plant. It was recommended that fumes from molding areas be vented outside the plant and that assembly, storage...