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Pitting

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Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030033
EISBN: 978-1-62708-282-2
... Abstract This chapter concentrates on the better-known and widely studied phenomenon of pitting corrosion of passive metals. The discussion focuses on different parameters that influence pitting corrosion, namely environment, metal composition, potential, temperature, surface condition...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.caaa.t67870045
EISBN: 978-1-62708-299-0
... Abstract Pitting is the most common corrosion attack on aluminum alloy products. This chapter explains why pitting occurs and how it appears in different types of aluminum. It discusses pitting rates, pitting potentials, and pitting resistance as well as testing and prevention methods. It also...
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Published: 01 December 2008
Fig. 25 Variation of critical pitting temperature with pitting resistance equivalent number (PREN) of austenitic steels in water plus 6% FeCl e . Source: Ref 26 More
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Published: 01 December 2008
Fig. 23 Critical pitting temperature versus pitting resistance equivalent number (PREN); SUS 329J4L = S31260, YUS 270 = S31254. Source: Ref 26 More
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Published: 30 November 2013
Fig. 11 Cavitation pitting fatigue. (a) Cavitation pitting on a gray cast iron diesel-engine cylinder sleeve. The pitted area is several inches long, and the pits nearly penetrated the thickness of the sleeve. Note the clustered appearance of the pits at preferred locations. (b) Cavitation More
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Published: 01 November 2012
Fig. 25 Cavitation pitting fatigue. (a) Cavitation pitting on a gray cast iron diesel engine cylinder sleeve. The pitted area is several inches long, and the pits nearly penetrated the thickness of the sleeve. Note the clustered appearance of the pits at preferred locations. (b) Cavitation More
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Published: 01 July 2000
Fig. 7.1 Examples of pitting corrosion. (a) Pitting and subsequent cracking in a chromium-plated copper sink-drain trap. (b) Pitting in a stainless steel thermos-bottle liner. (c) Pitting in a brass condensate line. (d) Mounds (or tubercles) associated with microbiologically influenced More
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Published: 01 July 2000
Fig. 7.22 Correlation between the critical pitting temperature and critical pitting potential of 17 high-performance alloys. The alloys are: (1) 317LM, (2) 3RE60, (3) AF22, (4) 44LN, (5) FERRALIUM ALLOY 255, (6) 20CB-3 Alloy, (7) URANUS 86, (8) 2545LX, (9) JESSOP 700, (10) JESSOP 777, (11 More
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Published: 01 August 1999
Fig. 1 Comparison of pitting and intergranular corrosion morphologies. (a) Pitting-type corrosion in the surface of an aircraft wing plank from an alloy 7075–T6 extrusion. (b) Intergranular corrosion in alloy 7075–T6 plate. Grain boundaries were attacked, causing the grains to separate. Both More
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Published: 01 August 1999
Fig. 2 Pitting corrosion of an aluminum alloy 2014–T6 sheet. Pitting occurred during the manufacturing cycle. Note the intergranular nature of the pit. 150× More
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Published: 01 June 1985
Fig. 5-1. Helical gear tooth, 1×. Pitting/spalling mode originating at a pit caused by subsurface fatigue around a small nonmetallic inclusion. Only one tooth affected. An isolated, random case. More
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Published: 01 June 1985
Fig. 5-14. Spiral bevel tooth, 2×. Pitting and spalling due to rolling contact fatigue in a concentrated area (see Fig. 4-16 ) as a designed failure. More
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Published: 01 June 1985
Fig. 5-21. Tooth tip interference causing in-line pitting low on the active profile. A spalling action has resulted. More
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Published: 01 June 1985
Fig. 6-4. Spur pinion, 1×, showing low-profile pitting along heavy line contact that is characteristic of tip interference from mating part. More
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Published: 01 June 1985
Fig. 4-13. Helical gear teeth, 2×. Pitting initiated along the pitchline and just above the pitchline. In some areas, the progression has been continuous. More
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Published: 01 June 1985
Fig. 4-14. Spiral pinion tooth, 200×. Near-pitchline pitting fatigue. Origin is subsurface at plane of maximum shear. More
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Published: 01 June 1985
Fig. 4-15. Spiral bevel tooth, 100×. Nital etch. Pitting at lowest point of single tooth contact, illustrating contact path of the tip of the mating tooth. More
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Published: 01 June 1985
Fig. 4-16. Surface fatigue pitting initiated in a short concentrated area of a spiral bevel tooth, when that tooth was momentarily assuming full load with no help of overlap from adjacent teeth. More
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Published: 01 June 1985
Fig. 4-23. Spiral bevel gear teeth, 1.5×. Original pitting low on the active profile gives initiation to a fast and extensive progression of spalling over the top face and down the back profile. This is often called the “cyclone effect.” More
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Published: 01 June 1985
Fig. 4-24. Spur gear, 0.5×. Pitting fatigue progressing to spalling. (a) Lines of pitting just below the pitchline; (b) light spalling up and over the addendum; (c) complete spalling of all teeth. More