Investigation on corrosion performance of multilayer Ni-P/TiO₂ composite coating on steel

Abstract

Electroless nickel coating treatment improves the corrosion resistance of mild steel. This work aims at studying the corrosion behavior of electroless Ni-P/ TiO 2 composite and multilayer coatings applied to the mild steel substrate as their as-plated state and furnace annealed at various temperatures and compared both the coatings ' corrosion performance. The corrosion behavior of the deposits was evaluated by potentiodynamic polarization studies in 3.5 wt% sodium chloride solution. The results showed that the corrosion resistance of the multilayer coating was two times higher compared to the composite coatings. Further, the corrosion mechanism was discussed in terms of microstructure, phase transformation, grain size, and microstrain.

Corrosion characteristics of microwave and furnace annealed electroless Ni-P-TiO2 coatings

“…1,2 Further, co-depositing another metallic, ceramic and lubricities particle in Ni-P matrix can improve the corrosion, wear, magnetic, conductive and hardness properties. 3,4 The size, shape, nature, compatibility, and deposition rate of the particles in the co-deposition determine the useable properties of electroless Ni-P composite layer. 5 Various materials such as TiO 2 , SnO 2 , SiO 2 , ZnO, ZrO 2 , Al 2 O 3 , TiC, SiC, BN, WC, TiN, WO 3 , 6 MMT, 7 MOF 8 were co-deposited into the electroless nickel coatings to enhances various surface properties.…”

Experimental Study on Hybrid Magnesium Composites for Human Bone Implants

“…A various characteristics of the magnesium could be enhanced by forming alloys and composites through proper selection of alloying elements and particle reinforcements. The after heat treatment process could be further improved these characteristic by forming secondary phases of the elements present in the alloys and composites [2,3,4].…”

Hardness Characteristics of Tio2/Al2o3 Reinforcement in Mg Composites

“…The phase formation is depends with the nature of chemical reaction taken place between the reinforcement/inclusion and matrix material. The formed secondary phases could be improved the interfacing strength of the matrix material [4,5]. In light weight material application, Mg alloys and their composites are exhibits satisfied mechanical properties.…”