Effect of CTAB surfactant on microstructure and oxidation behavior of Ni-TiO2 Composite coating

Subject Areas : Corrosion and protection of materials

Eisa Khoran ¹ (Department of Metallurgy and Materials Science, Faculty of Engineering, Shahid Bahonar University of Kerman, Jomhoori Eslami Blvd, Kerman, Iran)
Morteza Zanrahimi ² (Department of Metallurgy and Materials science, Faculty of Engineering, Shahid Bahonar University of Kerman, Jomhoori Eslami Blvd., Kerman, Iran)
Hadi Ebrahimifar ³ (Department of Materials Engineering, Faculty of Sciences and Modern Technologies, Graduate University of Advanced Technology, Kerman, Iran)

Received: 2018-08-01 Accepted : 2018-10-20 Published : 2018-12-01

Keywords: Oxidation, Electrodepoistion, Ni-TiO2 coating, CTAB,

Abstract :

Surface modification is very important in the component in industry due to wear and corrosion. In order to improve the corrosion behavior of steels, a protective coating can be deposited onto the surface. In this study Ni-TiO2 coatings were prepared on an AISI 430 stainless steel substrate by electrocodeposition process in Watt’s plating bath containing TiO2 particles. Two types of coatings was produced; without CTAB and at presence of CTAB surfactant. Isothermal oxidation behavior of uncoated and two types of coated specimens were studied up to 250 h in 800 ºC. Also cyclic oxidation was studied for 100 cycles at 800 C. Scanning electron microscope (SEM) and X-ray systems were applied in order to investigate the formed phases and structures of composite coating before and after oxidation. Results showed coated specimens at presence of CTAB surfactant had lower mass gain compared to Ni-TiO2 coated and uncoated ones after isothermal and cyclic oxidation at 800 ºC.