Fault Tree Analysis for Fungal Corrosion of Coated Aluminum

Chawla, S.; Payer, Joe H.; Giai, Carla

doi:10.5006/1183

Cited by 1 publication

(1 citation statement)

References 35 publications

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“…The approach was demonstrated for the identification of mitigation actions to reduce the risk of fungal corrosion of coated Al in aircraft. 51 Mitigation actions can be directed toward each stage of the sequence of damage to eliminate or mitigate failure pathways. The sequence of corrosion damage at fasteners in Al was determined here.…”

Section: Implications For Design Installation and Corrosion Mitigatmentioning

confidence: 99%

Stages of Damage Evolution for Al 2024-T3 Around Fasteners in Marine Atmosphere

Young¹,

Payer²

2015

CORROSION

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Corrosion at fasteners in aluminum presents a high risk and a challenge to corrosion mitigation strategies. The objective of this study was to determine the stages of damage evolution for 2024-T3 around fasteners when exposed at a marine atmospheric corrosion site. A comparison was made between fasteners made from stainless steel, cadmium-plated steel, and cadmium-plated steel with a portion of the plating ground to expose steel and simulate damage to the coating. Corrosion modes were identified over 24-month exposure, and a sequence of corrosion damage stages was developed. Several modes interacted and/or occurred in a sequential pattern. In addition to classic galvanic corrosion, galvanic action had a significant effect on crevice corrosion, intergranular corrosion, and stress corrosion cracking. The im portant roles of rust on steel fasteners and wedging from the formation of dense corrosion products were identified. Results are relevant to crucial concerns in modeling of damage evolution and development of corrosion mitigation strategies. ISSN 0010-9312 (print), 1938-159X (online) 15/000209/$5.00+$0.50/0 © 2015, NACE InternationalFIGURE 3. Al/fastener assemblies exposed at Dayton, Florida (left). Right photo is depicting the "time on a clock" terminology and rolling direction of Al plate (arrow) for the 6-month CdSteel fastener. FIGURE 4. Metallography photographs after utilizing Keller's etchant for 10 s to reveal the high-angle grain boundaries, subgrain boundaries, as well as particles in the recrystallized 2024-T3 microstructure.

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Section: Implications For Design Installation and Corrosion Mitigatmentioning

confidence: 99%