Biyodizel kaynaklı korozyon ve bozunma: Bir inceleme

Yıl 2019, Cilt: 25 Sayı: 1, 60 - 70, 26.02.2019

Muhammet Kaan Yeşilyurt , İlhan Volkan Öner , Efe Çetin Yılmaz

Öz

Fosil yakıt kaynaklarının hızla tüketilmesi ve
enerji ihtiyacının karşılanmasında dışa bağımlılık kaygısı, alternatif yakıt
araştırmalarına yol açmıştır. Transesterifikasyon yoluyla bitkisel yağ ve
hayvansal yağ gibi birçok yenilenebilir kaynağından elde edilebilen biyodizel,
otomobiller için, özellikle çevre dostu olmak için en çekici alternatif
yakıttır. Ancak bazı eksiler de var. Biyodizelde su ve serbest yağ asitleri
varlığı onu petrol türevi dizelden daha korozif yapar ve bu istenmeyen bir
özelliktir. Biyodizel ile temastan kaynaklanan korozyon hem metal parçaların
ömrünü azaltır hem de yakıt özelliklerini kötüleştirir ve bu nedenle motor
performansını olumsuz olarak etkiler. Bu nedenle, biyodizelin korozif
özellikleri, motor bileşenlerinin uzun süreli dayanıklılığı için çok önemlidir.
Bu çalışmada, farklı biyodizel yakıtlarıyla farklı sıcaklıklarda farklı
dönemler için önceki çalışmaların test sonuçlarını değerlendirerek ve
karşılaştırarak biyodizel ve harmanların motor parçaları üzerindeki korozif
etkileri araştırılmıştır. Katkı maddeleri kullanarak biyodizelin korozif
etkilerini önlemek veya azaltmak için düzeltici önlemler de ele alınmaktadır.

Anahtar Kelimeler

Biyodizel, Biyodizelin korozyon karakteristikleri, Metallerin korozyon direnci, Önleyici etkiler

Biodiesel induced corrosion and degradation: Review

Öz

Rapid
depletion of fossil fuel resources as well as concerns for foreign dependence
in meeting energy needs have led researches for alternative fuels. Biodiesel,
which can be obtained from many renewable resources such as vegetable oil and
animal fat through transesterification, is the most attractive alternative fuel
for cars, especially for being environmentally friendly. However, there are
some cons, too. The presence of water and free fatty acids in the biodiesel
makes it more corrosive than petrol-diesel, and this is an undesired feature.
Corrosion induced by contact with biodiesel both reduces the life of metal
parts and deteriorates the fuel properties, hence adversely affects engine
performance. Therefore, the corrosive characteristics of biodiesel are very
important for long term durability of engine components. In this study, we
tried to investigate the corrosive effects of biodiesel and blends on engine
parts by evaluating and comparing test results from earlier studies for
different periods at different temperatures with different biodiesel fuels.
Remedial measures to inhibit or mitigate corrosive effects of biodiesel by using
additives are also tackled.

Anahtar Kelimeler

Biodiesel, Corrosion characteristics of biodiesel, Corrosion resistance of metals, Inhibitory effects

Kaynakça

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