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filiform corrosion

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Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003614
EISBN: 978-1-62708-182-5
... Abstract Filiform corrosion has been observed to occur under a wide range of organic coatings and proceeds with the same general characteristics on steel, aluminum, and magnesium. This article describes the standard tests for filiform corrosion, characteristics and mechanisms of filiform...
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Published: 30 November 2018
Fig. 7 Typical filiform corrosion. The corrosion may have started at the crevice to the right or at a pinhole or discontinuity in the coating. Tendrils extend from the main area of corrosion, which has been opened to show the white powdery aluminum corrosion product. A fingernail at the lower More
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Published: 15 June 2019
Fig. 23 Filiform corrosion on cast aluminum alloy automotive wheels that were lacquered with a clear coat to prevent dulling of the aluminum. Arrows indicate sites of significant activity. Note that each filiform originates at sharp corners where the clear coat is very thin, cracked More
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Published: 01 December 1998
Fig. 3 Examples of filiform corrosion of aluminum. (a) Aluminum foil coated with polyvinyl chloride showing the advancing head and cracked tail section of a filiform cell. SEM. 80×. (b) Filiform corrosion of a painted aluminum aircraft skin More
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Published: 30 November 2018
Fig. 5 Electrochemical mechanism of filiform corrosion More
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Published: 30 November 2018
Fig. 6 Filiform corrosion initiating through a crack or pore in the coating More
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Published: 01 January 2003
Fig. 1 Filiform corrosion on cast aluminum alloy automotive wheels that were lacquered with a clear coat to prevent dulling of the aluminum. Arrows indicate sites of significant activity. Note that each filiform originates at sharp corners where the clear coat is very thin, cracked, or severed. More
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Published: 01 January 2003
Fig. 2 Filiform corrosion on a clear-lacquered steel hammerhead exposed to humid conditions. Fine filaments have extended over the entire surface of the hammerhead, with filiforms originating at corners, grind marks, or other sites where the coating varies in thickness. More
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Published: 01 January 2003
Fig. 3 A lacquered steel can lid exhibiting filiform corrosion showing both large and small filaments partially oriented in the rolling direction of the steel sheet. Without this 10× magnification by a light microscope, the filiforms look like fine striations or minute tentacles. More
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Published: 01 January 2003
Fig. 4 Filiform corrosion on PVC-coated aluminum foil. (a) Advancing head and cracked tail section of a filiform cell. Scanning electron microscopy (SEM). 80×. (b) The gelatinous corrosion products of aluminum oozing out of the porous end tail section of a filiform cell. SEM. 830×. (c) Tail More
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Published: 01 January 2003
Fig. 6 Diagrams of the filiform-corrosion cell in steel (a), aluminum (b), and magnesium (c). Corrosion products and predominant reactions are labeled. Filiform corrosion is a differential-aeration cell driven by differences in oxygen concentration in the head versus the tail section More
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Published: 01 January 2005
Fig. 48 The filiform corrosion problems of Fig. 47 are exacerbated by handling the unlacquered parts without gloves. Fingerprints are obvious in this photograph. Corrosion form and mechanism Localized corrosion, filiform corrosion Material Carbon steel, lacquer coated Product More
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Published: 01 January 2006
Fig. 4 Filiform corrosion of an aluminum external surface adjacent to steel fasteners. Courtesy of J. Benfer, Naval Air Depot—Jacksonville More
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Published: 01 January 2006
Fig. 5 Macrophotograph illustrating filiform corrosion of an aluminum aircraft surface adjacent to steel fastener. Courtesy of J. Benfer, Naval Air Depot—Jacksonville More
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Published: 01 January 2005
Fig. 47 Occasional premature discoloration was noted on polished and coated steel indoor furniture, which worsened over several weeks with threadlike features (filiform corrosion). The polished carbon steel sections were absent of visual blemishes prior to coating with a clear lacquer More
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006492
EISBN: 978-1-62708-207-5
... coatings and paints. It addresses some of the more common corrosion mechanisms, including corrosion driven by pH extremes, pitting corrosion, crevice corrosion, galvanic corrosion, and filiform corrosion. The article also describes in-plant as well as field application procedures for cleaning and coating...
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004169
EISBN: 978-1-62708-184-9
... Abstract This article describes the commonly observed forms of airplane corrosion, namely: general corrosion, exfoliation corrosion, pitting corrosion, microbiologically induced corrosion, galvanic corrosion, filiform corrosion, crevice corrosion, stress-corrosion cracking, and fretting...
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003815
EISBN: 978-1-62708-183-2
..., erosion-corrosion, atmospheric corrosion, filiform corrosion, and corrosion in water and soils. The article describes the effects of composition, microstructure, stress-intensity factor, and nonmetallic building materials on the corrosion behavior of aluminum and its alloys. It also provides information...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003130
EISBN: 978-1-62708-199-3
... and aluminum alloys, including pitting corrosion, intergranular corrosion, exfoliation corrosion, galvanic corrosion, stray-current corrosion, deposition corrosion, crevice corrosion, filiform corrosion, stress-corrosion cracking, corrosion fatigue, and hydrogen embrittlement. The article also presents a short...
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Published: 01 January 2003
Fig. 10 Cross section of aluminum foil laminated on paperboard showing the expansion of the polyvinyl chloride coating by the corrosion products of filiform corrosion. Note the void spaces between the paperboard fibers that can entrap water. Scanning electron microscopy. 650× More