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stray current corrosion

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c0091292
EISBN: 978-1-62708-219-8
..., or shielding the source of stray current are obvious solutions. Pipe couplings Stray current corrosion Water treatment systems Copper pipe Uniform corrosion (Other, general, or unspecified) corrosion Abstract Abstract A 25 mm (1 in.) copper coupling had been uniformly degraded around most...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001485
EISBN: 978-1-62708-225-9
... of harmful liquids, and stray electric currents. Most common modes of failure include flaking or pitting (fatigue), cracks or fractures, creep, smearing, wear, softening, indentation, fluting, and corrosion. The modes of failure are illustrated with examples from practice. Roller bearings Rolling...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001765
EISBN: 978-1-62708-241-9
... on a number of soil parameters, for example, pH; resistivity; redox potential; and moisture, sulfides, sulfates, and chlorides content. Stray direct currents (DC) or induced alternating current (AC) sources can accelerate soil corrosion. Background of the Failure The bottom plates of the potable water...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c0091201
EISBN: 978-1-62708-219-8
... and removed. There was no evidence of stray currents or electrical discharge. It was noted that the ambient temperature and slow or stagnant flow conditions present in the piping were ideal for bacteria growth. Water samples were obtained for corrosivity and MIC testing. Commercially available field...
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
... to corrosion must be understood. Where history or analyses indicate that the environment is aggressive, corrosion-control methods need to be developed and initiated. To evaluate corrosion-exposure conditions for metallic piping networks, field conditions such as soil type, soil pH, stray current effects...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001810
EISBN: 978-1-62708-180-1
..., lubricant, and bearing components Potential sources of debris Potential sources of electrical current passing through the bearing Potential sources of water and other corrosive fluids Load spectrum and sources of potential-unknown loads Misalignment of deflections that influence load...
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 the specific conditions of environmental or electrochemical attack. For example, uniform thinning can be attributed to various conditions such as: Atmospheric corrosion Aqueous corrosion Galvanic corrosion Stray-current corrosion (which is similar to galvanic corrosion, but does not rely...
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
..., battery, or solar cell. Conversely, stray currents can be a source of increased galvanic degradation. Altering the Electrolyte The use of corrosion inhibitors is effective in some cases. Elimination of cathodic depolarizers (deaeration of water by thermomechanical means plus oxygen scavengers...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001645
EISBN: 978-1-62708-232-7
... or multiple interactions among several factors. The important factors that contribute to premature service failure include improper fitting, inadequate lubrication, overloading, vibration, impact loading, debris ingress, contamination, high operating temperatures, and stray electrical fields. Bearings subject...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001817
EISBN: 978-1-62708-180-1
... in uniform wall thinning causes considerable damage to heat-exchanger tubes. However, the principal corrosion damage in heat exchangers is usually from localized attack. Stray electrical currents may also contribute to significant corrosion of heat exchangers. Localized corrosive attack can occur as pitting...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001829
EISBN: 978-1-62708-241-9
... excessive oxidation and corrosion of high-strength nickeland cobalt-base superalloys being used for turbine blades and vanes [ 1 , 2 ]. The first-stage vanes are subjected to the highest gas velocity and temperature in the engine. Since the gas entering the first-stage vane can be above the melting...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001831
EISBN: 978-1-62708-241-9
... of corrosion. Meanwhile, some black-colored substances adhering to the contact surface too are observed, Fig. 5d . According to the EDS results ( Fig. 5f ), besides the elements of the matrix material, molybdenum, Mo, and sulfur, S, are also present. In other words, such substances were the residua...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c0047335
EISBN: 978-1-62708-219-8
... typical of cast iron pipe. Chemical analyses of the porous region had a substantial increase in carbon, silicon, phosphorus, and sulfur. The porous appearance and the composition of the soft porous residue confirmed graphitic corrosion. The selective leaching of iron leaves a residue rich in carbon...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0091754
EISBN: 978-1-62708-229-7
... partial pressures of the gases within the duct, combined with the high temperatures, facilitated nitrogen pickup. No recommendations were made. Intergranular precipitation Oxidation Spalling Inconel 317 UNS N06617 High-temperature corrosion and oxidation The presence of carbides...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0046535
EISBN: 978-1-62708-234-1
... depression in the backfill revealed the site of failure. Analysis (visual inspection, electrical conductivity, and soil analysis) supported the conclusions that the failure had resulted from galvanic corrosion at a point where the corrosivity of the soil was substantially greater than the average, resulting...