The Effect of Magnetic Field on CoNiFe/Al2O3 Composite Coating Properties Prepared by Electrodeposition

The CoNiFe/Al 2 O 3 composite coating was electrodeposited on copper by magnetic field-assisted electrodeposition. The effect of magnetic fields on the structure, composition, morphology and magnetic property of the CoNiFe/Al 2 O 3 composite coating was investigated. The disturbance effect produced by the Lorentz force as the result of the interaction between magnetic field and electric field can affect electrochemical reaction to increase deposition rate, refine coating particles, reduce roughness and enhance magnetic performance. The CoNiFe/Al 2 O 3 composite coating is composed of granular particles. The composite coating prepared at 1.5 T magnetic field intensity possesses the best magnetic performance and optimal corrosion resistance.