Mekanik alaşımlama yöntemi ile üretilen Al matrisli hibrit kompozit malzemenin farklı çözeltilerdeki korozyon davranışları

Yıl 2022, Cilt: 24 Sayı: 1, 289 - 299, 05.01.2022

Doğan Şimşek

https://doi.org/10.25092/baunfbed.997536

Cited By: 2

Öz

Bu çalışmada, Mekanik Alaşımlama (MA) yöntemiyle üretilen alüminyum matrisli hibrit (in-situ Al4C3 ve ex-situ Al2O3) kompozit malzemenin farklı çözeltilerdeki korozyon davranışları incelenmiştir. Alüminyum matrise %2 grafit ve %12 Al2O3 ilave edilerek hazırlanan tozlar mekanik alaşımlanmıştır. Mekanik alaşımlanan hibrit kompozit tozlar 750 MPa altında soğuk preslenmiş ve 600 °C sıcaklıkta 120 dk sinterlenmiştir. Üretilen AMK malzemelerin korozyon testleri %3,5 NaCl ve 0,1 M H2SO4 çözeltilerinde elektrokimyasal empedans spektroskopi (EIS) ve potansiyodinamik polarizasyon teknikleri kullanılarak yapılmıştır. Polarizasyon ölçümleri üç elektrot kurulumlu bir korozyon hücresinde (Ag/AgCl referans elektrotu, bir platin plaka ve karşıt elektrot) yapılmıştır. Mikroyapı çalışmalarında matrise ilave edilen Al2O3 takviyesinin tane sınırlarında kümelenme eğiliminde olduğu görülmüştür. Ayrıca matrise ilave edilen grafit’in yapıda tamamen çözünmediği iri grafit parçacıkları şekilde kaldığı görülmüştür. XRD sonuçlarında yapıda oluşması beklenen Al4C3 fazının oluştuğu belirlenmiştir. Korozyon sonuçlarda hibrit kompozit malzemenin NaCl çözeltisi içerisinde daha düşük potansiyel ve daha düşük akım yoğunluğu elde edilmiştir. Empedans ölçümleri sonucunda H2SO4 çözeltisinde daha küçük bir yarım daire çapına sahip Nyquist eğrisi elde edilmiştir. Sonuçlarda NaCl çözeltisi içerisinde korozyon direncinin H2SO4 çözeltisinden daha iyi olduğu belirlenmiştir. Korozyon yüzeyi incelemelerinde baskın korozyon mekanizmasının çukurcuk korozyonu olduğu görülmüştür.

Anahtar Kelimeler

Hibrit kompozit, potansiyodinamik polarizasyon, empedans, korozyon.

Corrosion behaviors in different solutions of hybrid composite produced by mechanical alloying method

Öz

In this study, was investigated corrosion behavior in different solutions of aluminum matrix hybrid (in-situ Al4C3 and ex-situ Al2O3) composite material produced by Mechanical Alloying (MA) method. The powders prepared by adding 2% graphite and
12% Al2O3 to the aluminum matrix were mechanical alloyed. Mechanically alloyed hybrid composite powders were cold pressed under 750 MPa and sintered at 600 °C for 120 min. Corrosion tests of the produced AMK materials were carried out in 3.5% NaCl and 0.1 M H2SO4 solutions using electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization techniques. Polarization measurements were made in a corrosion cell with a three-electrode setup (Ag/AgCl reference electrode, a platinum plate, and counter electrode). In the microstructure studies, it was observed that the Al2O3 reinforcement added to the matrix tended to cluster at the grain boundaries. In addition, it was observed that the graphite added to the matrix remained in the form of coarse graphite particles that did not completely dissolve in the structure. In the XRD results, it was observed that the Al4C3 phase expected to form in the structure was formed. In the results obtained, it was observed that the hibrit composite material had lower potential and lower current density in the NaCl solution. As a result of impedance measurements, a Nyquist curve with a smaller semicircle diameter was obtained in H2SO4 solution. The results showed that corrosion resistance in NaCl solution was better than in H2SO4 solution. Pitting corrosion was found to be the dominant corrosion mechanism in the corrosion surface examinations.

Anahtar Kelimeler

Hybrid composite, potentiodynamic polarization, impedance, corrosion.

Kaynakça

• Alaneme, K.K., Anabaranze, Y.O., ve Oke, S.R., Softening Resistance, Dimensional Stability and Corrosion Behaviour of Alumina and Rice Husk Ash Reinforced Aluminium Matrix Composites, Subjected to Thermal Cycling. Tribology in Industry, 37, 2, 204-214 (2015).
• Kala, H., Mer, K.K.S., ve Kumar, S., A review on mechanical and tribological behaviors of stir cast aluminum matrix composites., Procedia Materials Science, 6, 1951-1960, (2014).
• McCafferty, E. Sequence of steps in the pitting of aluminum by chloride ions, Corrosion Science, 45, 7, 1421-1438, (2003).
• Simsek, D., Simsek, I., ve Ozyurek, D., Relationship between Al2O3 content and wear behavior of Al+ 2% graphite matrix composites, Science and Engineering of Composite Materials, 27, 1, 177-185, (2019).
• Al-Salihi, H.A., Mahmood, A.A., ve Alalkawi, H.J., Mechanical and wear behavior of AA7075 aluminum matrix composites reinforced by Al2O3 nanoparticles, Nanocomposites, 5, 3, 67-73, (2019).
• Şimşek, I. Investigation of the effect of second phase precipitates on the corrosion and electrical conductivity of 7075 aluminum alloys, Anti-Corrosion Methods and Materials, 66, 5, 683-688, (2019).
• Dolata, A.J., Dyzia, M., ve Walke, W. Influence of particles type and shape on the corrosion resistance of aluminium hybrid composites, In Solid State Phenomena, 191, 81-87, (2012).
• Alaneme, K.K. Corrosion behaviour of heat-treated Al-6063/SiCp composites immersed in 5 wt% NaCl solution, Leonardo Journal of Science, 18, 18, 55-64, (2011).
• Bobic, B., Mitrovic, S., Babic, M., ve Bobic, I. Corrosion of metal-matrix composites with aluminium alloy substrate, Tribology in Industry, 32, 1, 3, (2010).
• De Salazar, J.M.G., Urena, A., Manzanedo, S., ve Barrena, M. I., Corrosion behaviour of AA6061 and AA7005 reinforced with Al2O3 particles in aerated 3.5% chloride solutions: potentiodynamic measurements and microstructure evaluation, Corrosion Science, 41, 3, 529-545, (1998).
• Karacif, K., Karabulut, H., ve Çıtak, R., Al2O3 Takviyeli alüminyum esaslı kompozit malzemelerde mekanik alaşımlama süresinin korozyon davranışına etkilerinin incelenmesi, International Journal of Engineering Research and Development, 11, 2, 576-583, (2019).
• Alaneme, K. K., ve Olubambi, P. A., Corrosion and wear behaviour of rice husk ash—Alumina reinforced Al–Mg–Si alloy matrix hybrid composites. Journal of Materials Research and Technology, 2, 2, 188-194, (2013).
• Erek, H. B., Özyürek, D., ve Asan, A., Corrosion behaviour and electrical conductivity of reinforced TiAl3 and B4C hybrid aluminium composites. Acta Physica Polonica A, 131, 156-158, (2017).
• Özyürek, D., ve Tekeli, S., An investigation on wear resistance of SiCp-reinforced aluminium composites produced by mechanical alloying method, Science and Engineering of Composite Materials, 17,1, 31-38, (2010).
• Chu, H. S., Liu, K. S., ve Yeh, J. W., Damping behavior of in situ Al–(graphite, Al4C3) composites produced by reciprocating extrusion, Journal of Materials Research, 16, 5, 1372-1380, (2001).
• Sajjadi, S.A., Parizi, M.T., Ezatpour, H.R., ve Sedghi, A., Fabrication of A356 composite reinforced with micro and nano Al2O3 particles by a developed compocasting method and study of its properties, Journal of Alloys and Compounds, 511, 1, 226-231, (2012).
• Şimşek, İ., Şimşek, D., ve Özyürek, D., B4C Takviyeli alüminyum matris kompozitlerin farklı çözeltilerdeki korozyon davranışları, Journal of Boron, 5, 1, 23-28, (2019).
• Bostan, B., Özdemir, A. T., ve Kalkanli, A., Microstructure characteristics in Al-C system after mechanical alloying and high temperature treatment, Powder Metallurgy, 47, 1, 37-42, (2004).
• Şimşek, İ., Şimşek, D., ve Özyürek, D., The effect of different sliding speeds on wear behavior of ZrO2 reinforcement aluminium matrix composite materials, International Advanced Researches and Engineering Journal, 4, 1, 1-7, (2020).
• Dobrzański, L. A., Włodarczyk, A., ve Adamiak, M., Structure, properties and corrosion resistance of PM composite materials based on EN AW-2124 aluminum alloy reinforced with the Al2O3 ceramic particles, Journal of Materials Processing Technology, 162, 27-32, (2005).
• Katkar, V.A., Gunasekaran, G., Rao, A.G., ve Koli, P.M., Effect of the reinforced boron carbide particulate content of AA6061 alloy on formation of the passive film in seawater, Corrosion Science, 53, 9, 2700-2712, (2011).
• Li, L.F., Daerden, M., Caenen, P., ve Celis, J.P., Electrochemical behavior of hot-rolled 304 stainless steel during chemical pickling in HCl-based electrolytes, Journal of the Electrochemical Society, 153, 5, B145-B150, (2006).
• Huanhuan, S., Hui, W., ve Fanling, M., Study of corrosion protection of the composite films on A356 aluminum alloy, Journal of Rare Earths, 29, 10, 991-996, (2011).
• Alaneme, K.K., Olubambi, P.A., Afolabi, A.S., ve Bodurin, M.O., Corrosion and tribological studies of bamboo leaf ash and alumina reinforced Al-Mg-Si alloy matrix hybrid composites in chloride medium, International Journal of Electrochemical Science, 9, 10, 5663-5674, (2014).
• Şimşek, İ. Investigation of Corrosion Behaviors of Al–B4C-reinforced Composite Materials in Different Antifreeze Solutions, Protection of Metals and Physical Chemistry of Surfaces, 57, 3, 565-569, (2021).