Improving the Corrosion Properties of AZ91 Magnesium Alloy by Coating CrN/NbN with PEO and PVD Duplex Coating Methods

Yıl 2022, , 289 - 299, 20.03.2022

Oktay Yiğit , Taha Çağrı Şenocak

https://doi.org/10.35234/fumbd.1020464

Öz

The development and application of traditional engineering materials in the automobile, aerospace, and aeronautics industries have supported the technological infrastructure. The usage of magnesium alloys with high specific strength is essential to produce low-weight designs, especially in advanced engineering applications. However, the high affinity of magnesium alloys against corrosion limits its usage area. Recently, physical vapor deposition (PVD) and plasma electrolytic oxidation (PEO) coating systems have improved metallic material's corrosion properties. In this study, AZ91 magnesium alloys have been coated firstly PEO method after that coated with two different magnetrons (Niobium and Chromium) in the PVD system. The effect of the PEO and CrN/NbN coatings on corrosion behavior was investigated in a 3.5% NaCl solution to increase the corrosion resistance of AZ91 magnesium alloy. It was determined that the corrosion resistance of the CrN/NbN multilayer coating onto PEO is better than that of the AZ91 magnesium alloy.

Anahtar Kelimeler

AZ91 Magnesium Alloy, Coatings, Physical Vapor Deposition, Plasma Electrolytic Oxidation, Corrosion

AZ91 Magnezyum Alaşımının PEO ve PVD Dublex Kaplama Yöntemleriyle CrN_NbN Kaplanarak Korozyon Özelliklerinin İyileştirilmesi

Öz

Otomobil, havacılık ve havacılık endüstrilerinde geleneksel mühendislik malzemelerinin geliştirilmesi ve uygulanması teknolojik altyapıyı desteklemiştir. Yüksek özgül mukavemete sahip magnezyum alaşımlarının kullanılması, özellikle ileri mühendislik uygulamalarında düşük ağırlıklı tasarımlar üretmek için çok önemlidir. Ancak magnezyum alaşımlarının korozyona karşı yüksek afinitesi kullanım alanını sınırlar. Son zamanlarda, fiziksel buhar biriktirme (PVD) ve plazma elektrolitik oksidasyon (PEO) kaplama sistemleri, metalik malzemelerin korozyon özelliklerini iyileştirmiştir. Bu çalışmada AZ91 magnezyum alaşımı önce PEO yöntemi ile kaplandıktan sonra PVD sisteminde iki farklı magnetron (Niobium ve Chromium) ile kaplanmıştır. AZ91 magnezyum alaşımının korozyon direncini artırmak için PEO ve CrN / NbN kaplamaların korozyon davranışına etkisi% 3,5 NaCl çözeltisinde araştırılmıştır. CrN / NbN çok katmanlı kaplamanın PEO üzerindeki korozyon direncinin AZ91 magnezyum alaşımındakinden daha iyi olduğu belirlendi.

Anahtar Kelimeler

AZ91 Magnezyum Alaşımı, Kaplamalar, Fiziksel Buhar Biriktirme, Plazma Elektrolitik Oksidasyon, Korozyon

Kaynakça

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