Corrosion studies on aluminium reinforced with uncoated and coated carbon fibres

Wielage, B.; Dorner, A.

doi:10.1016/s0266-3538(98)00163-8

Cited by 49 publications

(25 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The solid solubility of Ni in Al is less than 0.25 wt% at 600 • C. 24 The Ni-Al phase diagram, 25 shows various Ni-Al intermetallics such as; Al 3 Ni, Al 3 Ni 2 , AlNi, AlNi 3 , or Al 3 Ni 5 . The presence of Ni-Al intermetallics in Ni-coated Al (99.99%)/f MMCs is also reported by Wielage et al 20 The average corrosion rates of pure Al monolith and Al (99.99%)/C/50f MMCs at all the test sites for all the exposure periods are shown in Figure 3a and 3b. Figure 3a indicated that based on mass loss data of the pure Al monolith, the volcanic KIL was the most corrosive test site followed by the marine CI and KH sites, the industrial CIP site, the rainforest LA site, the agricultural EN site and the dry W site.…”

Section: Resultssupporting

confidence: 82%

Development of a Corrosion Model to Correlate the Atmospheric Corrosion Rate of a Carbon-Fiber Reinforced Aluminum MMC to Weather and Environmental Parameters

Tiwari

Hihara

2014

J. Electrochem. Soc.

View full text Add to dashboard Cite

A corrosion model was developed to correlate the atmospheric corrosion rates of 50 volume% nickel (Ni)-coated carbon (C) fiber reinforced pure aluminum (Al (99.99%)/C/50f) metal-matrix composites (MMCs) to weather and environmental parameters such as chloride (Cl − ) deposition rate, aerosol pH, and the percentage of time wet (Q4). The model was developed using polarization data of Al and C in solutions of various pH levels and Cl − concentrations. The polarization data indicated that the galvanic corrosion current (i galv ) between Al and C is a function of Cl − concentration and pH. There was a linear relationship between the logarithm of i galv and the logarithm of Cl − concentrations in neutral solutions with an R 2 value close to 0.95. Using the linear relationship, a corrosion model was developed that estimated the atmospheric corrosion rate of Al (99.99%)/50 MMCs as a function of the Cl − deposition rate and Q4 (i.e., [Cl - Compared to monolithic Al alloys, Al/C MMCs offer lower density and superior properties such as high specific strength and stiffness, good wear resistance, and low to zero coefficient of the thermal expansion. [1][2][3][4] Due to their unique properties, Al MMCs have received increased attention as an attractive choice in the automotive, defense, and aerospace industries. For example, Al/C MMCs have been used for antenna waveguide mast in the Hubble Space Telescope, 1,5 electromagnetic interference shielding in electronics 6 structural radiators in space applications, 5,7 and electronic packaging. 6,8,9 Al/C MMC wires are being explored to replace the steel-core Al-clad wires as the strength carrying members in aluminum electrical transmission lines as they offer higher electrical conductivity and low sag characteristics (due to their low CTE) when temperatures rise due to increased power transmission. 10,11 The high electrical conductivity of C, however, makes Al/C MMCs much more susceptible to corrosion due to the galvanic effect between the C fiber and the Al matrix. Galvanic couplings in A 356 Al alloy and graphite MMC (Al 356/Gr) by Kendall and Dull,12 Al 6061 reinforced with 30% C MMC (Al 6061/C/30f) by Dull and Harrigan, 13 Al (LM 13)/C/3f, AS7G0.6/C by Payen et al., 14 and Al 2024/C MMCs by Saxena, Prasad, and Dan, 15 were investigated in NaCl solutions. The presence of crevice corrosion along the region of high fiber densities was recognized as signs of galvanic coupling between the C fiber and Al matrix. 12,13 Payen et al., showed that the C fiber and Al matrix interface served as preferential sites for corrosion using long focal video microscopy. 14 Galvanic corrosion occurred between Al 2024 and graphite particles not only in NaCl but also in HCl, HNO 3 , H 2 SO 4 , HClO 4 acids. 15 Hihara and Latansion, 16 measured the galvanic corrosion current density and the galvanic potential between the graphite fiber and the Al 6061 matrix, using the zero-resistance ammeter (ZRA) in both 0.5 M Na 2 SO 4 and 3.15% NaCl solutions where the galvanic current in NaCl solution was signifi...

show abstract

Section: Resultssupporting

confidence: 82%

Development of a Corrosion Model to Correlate the Atmospheric Corrosion Rate of a Carbon-Fiber Reinforced Aluminum MMC to Weather and Environmental Parameters

Tiwari

Hihara

2014

J. Electrochem. Soc.

View full text Add to dashboard Cite

show abstract

“…All these results decrease the corrosion resistance of the composites. [12][13][14] The EIS bode plots for four different composites in 3.5 wt pct NaCl are shown in Figure 3. The spots of four composites at high frequencies were similar, and their electrode behaviors were controlled by doublelayer capacitance.…”

Section: Resultsmentioning

confidence: 99%

Effect of Magnesium Content on the Corrosion Behaviors of Grf/Al Composite

Wang

Chen

Yang

et al. 2010

Metall Mater Trans A

View full text Add to dashboard Cite

Graphite-fiber-reinforced aluminum composites (Gr f /Al) with different magnesium content were fabricated with the pressure infiltration method. Their corrosion behaviors were investigated by potentiodynamic polarization measurements, immersion tests, electrochemical impedance spectroscopy (EIS) analysis, and scanning electron microscopy (SEM). Both the corrosion potential (E corr ) and the pitting potential (E pit ) decreased with the increase of magnesium content, whereas the corrosion current density (i corr ) decreased sharply at first and then increased slightly. The i corr of Gr f /Al-3.2Mg was the lowest among the four composites with different magnesium contents, which indicated that Gr f /Al-3.2Mg had the best corrosion resistance. EIS showed that the capacitive reactance of Gr f /Al-8.5Mg was 1682 X 9 cm À2 , which was the worst, whereas that of Gr f /Al-3.2Mg was 3498 X 9 cm À2 , which was the best. SEM results revealed that magnesium and silicon formed the Mg 2 Si phase in Gr f /Al-3.2Mg, which hindered the extension of corrosion crack and improved the corrosion resistance.

show abstract

“…Due to its less reactivity with aluminum compared to carbon fibers, it can reduce the formation of Al 4 C 3 [58]. Hackl et al [59] reported that pyrolytic carbon coating would strongly accelerate electrochemical corrosion. Ouyang et al [60] used pyrolytic carbon/SiC hybrid coatings to improve wettability and protect carbon fibers, but the properties of the composites were not reported.…”

Section: Ceramic Coatingsmentioning

confidence: 99%

“…This method is effective but the matrix composition is modified, which may affect the overall properties of the composites. (3) Coating the carbon materials to produce diffusional barriers to prevent interfacial reactions and/or improve wettability, such as Ni [24,[27][28][29][30][31][32][33][34][35], Cu [27][28][29][36][37][38][39], W [40], Ti [41][42][43], SiC [44][45][46][47][48], TiC [44,46,[49][50][51][52][53], Al 2 O 3 [54,55], TiO 2 [29,56], ZrO 2 [57,58] and pyrolytic carbon [44,59,60] coatings. This method is effective and widely accepted, and it will be discussed in detail later.…”

Section: Introductionmentioning

confidence: 99%

Carbon Materials Reinforced Aluminum Composites: A Review

Huang

Ouyang

Zhang

et al. 2014

Acta Metall. Sin. (Engl. Lett.)

106

View full text Add to dashboard Cite

Carbon materials, including carbon fibers, graphite, diamond, carbon foams, carbon nanotubes, and graphene, are attractive reinforcements for aluminum matrix composites due to their excellent mechanical and/or physical properties as well as light weight. Carbon materials reinforced aluminum (C/Al) composites are promising materials in many areas such as aerospace, thermal management, and automobile. However, there are still some challenging problems that need to be resolved, such as interfacial reactions, low wettability, and anisotropic properties. These problems have limited the use of these composites. This review mainly focuses on the categories, fabrication processes, existing problems and solutions, coatings and interfaces, challenges and opportunities of C/Al composites so as to provide a useful reference for future research.

show abstract

Corrosion studies on aluminium reinforced with uncoated and coated carbon fibres

Cited by 49 publications

References 5 publications

Development of a Corrosion Model to Correlate the Atmospheric Corrosion Rate of a Carbon-Fiber Reinforced Aluminum MMC to Weather and Environmental Parameters

Development of a Corrosion Model to Correlate the Atmospheric Corrosion Rate of a Carbon-Fiber Reinforced Aluminum MMC to Weather and Environmental Parameters

Effect of Magnesium Content on the Corrosion Behaviors of Grf/Al Composite

Carbon Materials Reinforced Aluminum Composites: A Review

Contact Info

Product

Resources

About