The Investigation of Electrochemical Corrosion Behaviour of Fe Matrix Composites at Room and Elevated Temperatures

Year 2020, , 418 - 427, 31.01.2020

Fatih Aydın , Mehmet Akif Erden

https://doi.org/10.29130/dubited.542876

Cited By: 2

Abstract

In this study,
pure Fe and Fe matrix composites (5 wt. % nano-Al₂O₃, 5
wt. % micron-B₄C and 2.5 wt. % nano-Al₂O₃-2.5
wt. % micron-B₄C) were manufactured via powder metallurgy. The
density and phase analysis of the produced samples were performed. The
electrochemical corrosion behaviour of the samples in a 3.5 wt. % NaCl solution
was studied using potentiodynamic polarization at 25, 50 and 75 ºC. The
corrosion rate of the samples significantly increased with increasing test
temperature. Also, the effect of reinforcement particulates leads to
deteriorate corrosion resistance of pure Fe due to the presence of galvanic
reactions.

Keywords

Fe matrix composites, Corrosion, Galvanic reaction

Fe Matrisli Kompozitlerin Oda ve Yüksek Sıcaklıklardaki Elektrokimyasal Korozyon Davranışının İncelenmesi

Abstract

Bu çalışmada, saf Fe ve Fe matrisli kompozitler (%
5ağ. nano-Al2O3, %5ağ. mikron-B4C ve %2.5 ağ. 
nano-Al2O3-2.5 ağ. % mikron-B4C) toz metalurjisi ile üretilmiştir.
Üretilen numunelerin yoğunluk ölçümleri ve faz analizleri gerçekleştirilmiştir.
Numunelerin elektrokimyasal korozyon davranışı 25, 50 ve 75 ºC’de %3.5NaCl
çözeltisi içinde potansiyodinamik polarizasyon ile gerçekleştirilmiştir.
Numunelerin korozyon hızları artan test sıcaklığıyla önemli ölçüde artmıştır.
Ayrıca, takviye partikülleri galvanik reaksiyonlar sebebiyle saf Fe’in korozyon
dayanımını kötüleştirmiştir.

Keywords

Fe matrisli kompozitler, korozyon, galvanik reaksiyon, Al2O3, B4C

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