Plazma Püskürtme İşlemi ile Cr3C2 Kaplamanın Dizel Motorun Egzoz Borusu Üzerine Etkilerinin Araştırılması

Egzoz sisteminin ömrü, yüksek egzoz gazı sıcaklığı, egzoz gazındaki kimyasal çözücüler, su buharı, yağışlı havalarda su, çamur, yollarda dökülen tuz, kış aylarında donmayı önlemek için vb. Olumsuz faktörler altında hızla azalır. İçten Yanmalı motorların, kullanıldığı bölgelere ve koşullara bağlı olarak bir süre sonra değiştirilmeleri gerekir. Bu çalışmada, bir dizel motorun egzoz borusunun dış parçaları, plazma sprey yöntemi kullanılarak 100 mikron kalınlığında krom karbür (Cr3C2) malzemesi ile kaplandı. Dışarıdan etkileyen kimyasal ve fiziksel çözücünün ve deforme edici faktörlerin etkisi, egzoz borusunun krom karbür (Cr3C2) malzemesi ile kaplanmasıyla incelenmiştir. Deneyler sonucunda korozyon direncinin% 85 oranında arttığı belirlenmiştir. Taramalı elektron mikroskobu (SEM), mikro sertlik, EDAX ve X-RD analizlerine göre, kaplamanın ana materyali üzerinde düzgün bir yapı oluşturduğu gözlendi. Böylece, egzoz sisteminin ömrünü azaltan faktörlerin kaplama malzemesi ile karşılandığı, yüzey yapısının gelişmiş ve malzeme ömrünün standart egzoz borusuna kıyasla arttığı sonucuna varılabilir.

Anahtar Kelimeler:

Plazma Sprey Kaplama, Krom Karbür, Dizel Motorlar

Investigation of the Effect of Cr3C2 Coating by Plasma Spray Process on Exhaust Pipe of a Diesel Engine

Lifetime of exhaust system decreases rapidly under negative factors such as high exhaust gas temperature, chemical solvents in exhaust gas, water vapor, water in rainy weather, mud, salt poured on the roads to prevent frosting in winter months, etc. Exhaust system of internal combustion engines need to be replaced after a while based on regions and conditions in which they are used. In this study, outer parts of exhaust pipe of a diesel engine were coated with 100-micron-thick chromium carbide (Cr3C2) material by using plasma spray method. The effect of chemical and physical solvent and deforming factors that affect externally was examined by coating exhaust pipe with chromium carbide (Cr3C2) material. As a result of experiments, it was determined that corrosion resistance increased by 85%. According to scanning electron microscope (SEM), micro hardness, EDAX, and X-RD analyses, the coating was observed to generate a uniform structure on substrate material. Thus, it could be concluded that factors decreasing the lifetime of exhaust system were met by coating material, the surface structure enhanced, and material lifetime increased compared to standard exhaust pipe.

Keywords:

Plasma Spray Coating, Chromium Carbide, diesel engines,

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