Corrosion Properties of CrAlN and TiAlN Coatings Deposited by Thermoreactive Deposition Process |
| O. Cegila, B. Kılıncb, S. Senc and U. Senc
aKorfez Technical and Industrial Vocational High School, Department of Metal Technology, 41780, Korfez/Kocaeli, Turkey bDepartment of Metallurgical and Materials Engineering, Institute of Arts and Sciences, Sakarya University, Esentepe Campus, 54187 Sakarya, Turkey cDepartment of Metallurgical and Materials Engineering, Engineering Faculty, Sakarya University, Esentepe Campus, 54187 Sakarya, Turkey |
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| In the present study, the corrosion behaviors of chromium aluminum nitride (CrAlN) and titanium aluminum nitride (TiAlN) coatings deposited on AISI D2 steel samples are reported. Steel samples were pre-nitrided at 575°C for 8 h in the first step of the coating process, and then TiAlN and CrAlN coatings were performed by thermoreactive deposition process in a powder mixture consisting of alumina, ammonium chloride, aluminum and ferrous titanium or ferrous chromium for TiAlN or CrAlN, respectively. Coating treatments were realized at 1000°C for 2 h. Coated samples were characterized by X-ray diffraction analysis, optical microscopy, scanning electron microscopy, and microhardness tester. The corrosion properties of uncoated and coated samples were characterized by potentiostatic polarization test. CrAlN and TiAlN coated steel specimens exhibited the higher corrosion resistance than uncoated steels in a 0.5 M NaCl solution. |
DOI: 10.12693/APhysPolA.125.359 PACS numbers: 82.45.Bb, 81.65.Kn, 81.15.-z |