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Shahid, Muhammad

doi:10.1023/a:1018623623116

Cited by 35 publications

(18 citation statements)

References 5 publications

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“…5a) or hot nickel acetate (HNAS, Fig. 5b), which are similar to the typical spectra reported by other authors [23][24][25][26]. No indication of oxide degradation was observed during 2 weeks of exposure.…”

Section: Film Growth On Al7075-t6 Alloy and Al/sic Composite By Anodisupporting

confidence: 88%

Evaluation of different sealing methods for anodized aluminum‐silicon carbide (Al/SiC) composites using EIS and SEM techniques

Herrera-Hernández

Vargas-Garcı́a

Hallen-López

et al. 2007

Materials & Corrosion

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Electrochemical impedance spectroscopy (EIS) and the scanning electron microscope (SEM) have been used in an investigation of the effectiveness of various sealing methods that can be used to improve the corrosion resistance of an anodized aluminum-silicon carbide (Al/SiC) composite. Anodic oxide films were grown on Al7075-T6 and the Al/SiC composite by sulfuric acid anodizing and sealing in a cold saturated solution of nickel acetate. Other samples were sealed using the traditional method of boiling water or hot nickel acetate for comparison. The results revealed a uniform anodized layer on Al7075-T6 that resisted pitting corrosion for more than 2 weeks exposure to NaCl, whereas a cracked oxide film with variations in thickness was observed on the composite material. Pit initiation occurred in less than 5 days on the anodized Al/SiC that was sealed in the hot solutions. This study suggests that the traditional hot sealing methods did not provide sufficient corrosion protection for aluminum metal-matrix composites (MMCs) because the reinforcing SiC particles deteriorated the surface film structure. However, this defective film can be repaired by nickel hydrate precipitation during cold sealing or by applying a thick polyurethane coating.

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Section: Film Growth On Al7075-t6 Alloy and Al/sic Composite By Anodisupporting

confidence: 88%

Evaluation of different sealing methods for anodized aluminum‐silicon carbide (Al/SiC) composites using EIS and SEM techniques

Herrera-Hernández

Vargas-Garcı́a

Hallen-López

et al. 2007

Materials & Corrosion

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“…Some efforts have been devoted to corrosion protection methods such as anodizing [3], chemical conversion films [4,5] and laser surface treatment [6] on MMCs. Unfortunately, the conventional anodizing and chemical conversion films are less effective for the corrosion protection of aluminum matrix composites than that of aluminum alloys, owing to the presence of reinforcement phase, which hinders the initiation and growth of the oxide film and disrupts the film continuity [7].…”

Section: Introductionmentioning

confidence: 99%

Anti-corrosion film on 2024/SiC aluminum matrix composite fabricated by microarc oxidation in silicate electrolyte

Wang

et al. 2006

Journal of Alloys and Compounds

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“…Des Weiteren destabilisieren die Verstärkungspartikel den natürlichen Oxidfilm der Aluminiummatrix. [1,2,3,4] Daher ist es notwendig, die Aluminium-Matrix-Komposite mit einer entsprechenden Schutzschicht zu versehen. Die effektivste Methode dafür stellt das Anodisieren dar.…”

Section: Introductionunclassified

“…Die effektivste Methode dafür stellt das Anodisieren dar. [1,2,3,5] Allerdings ist die Herstellung einer anodischen Oxidschicht auf einem Aluminium-Matrix-Komposit aufgrund der verschiedenen Werkstoffe wesentlich komplexer und schwieriger zu realisieren als auf konventionellen, gut anodisierbaren Aluminium- Legierungen. Der Grund liegt in den Verstärkungskomponen-ten, die den Schichtaufbau wesentlich beeinflussen bzw.…”

Section: Introductionunclassified

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Hard anodizing of a coarse and an ultrafine‐grained aluminium‐copper alloy with incorporated alumina and silicon carbide particles

Händel¹,

Nickel

Alisch

et al. 2010

Materialwissenschaft Werkst

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Hard anodizing of a coarse and an ultrafine-grained aluminium-copper alloy with incorporated alumina and silicon carbide particles The hard anodizing of aluminium matrix composites (aluminium copper alloy, EN AW-2017) with incorporated alumina and silicon carbide particles fabricated by powder metallurgy was investigated depending on reinforcement particle size (fine or nano) and fraction (5 or 15 % by volume). The resulting layers with a thickness of more than 20 lm and the layer substrate interface were characterized subject to character, size and fraction of the reinforcement component. Furthermore a phase analysis was carried out. The reproducibility of this adapted process was proven by the achievable oxide layer thickness distribution as a function of anodization time. The impact of an ultrafine-grained microstructure induced by equal channel angular pressing on the anodization behaviour and layer characteristics was examined exemplarily.Keywords: aluminium matrix composites / hard anodizing / particle reinforcement / microstructure / equal channel angular pressing /

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Untitled

Cited by 35 publications

References 5 publications

Evaluation of different sealing methods for anodized aluminum‐silicon carbide (Al/SiC) composites using EIS and SEM techniques

Evaluation of different sealing methods for anodized aluminum‐silicon carbide (Al/SiC) composites using EIS and SEM techniques

Anti-corrosion film on 2024/SiC aluminum matrix composite fabricated by microarc oxidation in silicate electrolyte

Hard anodizing of a coarse and an ultrafine‐grained aluminium‐copper alloy with incorporated alumina and silicon carbide particles

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