Influence of Bath Composition on the Structure and Properties of Nickel Coatings Produced by Electrodeposition Technique

Electrodeposited nickel coatings are extensively used in engineering applications due to their excellent corrosion and wear resistance and easy mechanical operation. The structural characteristics, corrosion and mechanical properties of nickel coatings are related to the deposition parameters; such as bath component, composition, current density, pH, deposition time and additives. Electrodeposition technique is one of the most technologically feasible and economical techniques for producing metallic coatings. Watts bath is the most commonly applied nickel electrodeposition bath. Aim of this study is to optimize Watts bath composition by changing nickel chloride concentration and to investigate structural, morphological, corrosion and mechanical properties of produced coatings. It was found that coatings prepared with 0.17M nickel chloride concentration in Watts bath present the better corrosion resistance and mechanical property.

Banyo Kompozisyonunun Elektroçöktürme Yöntemi ile Üretilen Nikel Kaplamaların Yapısı ve Özelliklerine Etkisi

Elektroçöktürülmüş nikel kaplamalar mükemmel korozyon ve aşınma dayanımları ve mekanik olarak kolay işlenebilirlikleri sebebi ile mühendislik uygulamalarında yaygın olarak kullanılmaktadır. Nikel kaplamaların yapısal karakteristikleri, korozyon ve mekanik özellikleri banyo bileşenleri, kompozisyonları, akım yoğunluğu, pH, kaplama süresi ve katkılar gibi kaplama parametrelerine bağlıdır. Elektroçöktürme tekniği metalik kaplamaların üretiminde kullanılan teknolojik olarak en uygulanabilir ve ekonomik yöntemlerden birisidir. Watts banyosu nikelin elektroçöktürülmesinde en yaygın olarak kullanılan banyodur. Bu çalışmanın amacı nikel klorür konsantrasyonunun değiştirilmesi ile Watts banyo kompozisyonunu optimize edilmesi ve üretilen kaplamaların yapısal, morfolojik, korozyon ve mekanik özelliklerinin incelenmesidir. 0,17M nikel klorür konsantrasyonuna sahip Watts banyosu ile hazırlanmış olan kaplamaların daha iyi korozyon direncine ve mekanik özelliğe sahip olduğu bulunmuştur.

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