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stray direct 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
... that although the pipe was buried in noncorrosive sandy soil, it was found to incur stray currents at 2 Vdc in relation to a Cu/CuSO4 half cell. Recommendations included eliminating, moving, or shielding the source of stray current. Pipe couplings Stray current corrosion Water treatment systems Copper...
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
... ]. The severity of underside corrosion is directly related to the corrosivity of the soil, which depends 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...
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 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...
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
... contributing 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...
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
... the specimen and a counterelectrode to maintain that specimen at a given potential versus a reference electrode half-cell placed near the specimen. The current required is plotted as a function of potential over a range that begins at the corrosion potential and proceeds in the direction (anodic or cathodic...
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
... that specimen at a given potential versus a reference electrode half-cell placed near the specimen. The current required is plotted as a function of potential over a range that begins at the corrosion potential and proceeds in the direction (anodic or cathodic) required by that material. Such curves would...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006834
EISBN: 978-1-62708-329-4
... 1 , 2 Fig. 34 Low-alloy steel roller bearing from an improperly grounded electric motor that was pitted and etched by electrolytic action of stray electric currents in the presence of moisture Fig. 35 Different wearing patterns observed in rolling-element bearings. (a) Smearing...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006822
EISBN: 978-1-62708-329-4
.../isijinternational1966.19.401 45. Pargeter R.J. , Susceptibility to SOHIC for Linepipe and Pressure Vessel—Review of Current Knowledge , Corrosion 2007, NACE International , 2007 , p 1 – 27 46. Takahashi A. and Ogawa H. , Influence of Microhardness and Inclusion on Stress Oriented Hydrogen...
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 Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006813
EISBN: 978-1-62708-329-4
... 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, impingement, thinning, or selective leaching. General corrosion can be the result...