The formation of aluminum coatings on Armco iron under the influence of ultrasonic vibrations

Conclusions

• 1. Ultrasonic vibrations accelerate the process of aluminizing commercially pure iron and increase the depth of the coating.

• 2. With direct transmission of the ultrasonic vibrations to the sample, the depth of the aluminum coating is greater than in samples to which the ultrasonic vibrations are transmitted by the aluminizing mixture.

• 3. Ultrasonic vibrations substantially reduce the activation energy of diffusion, the effect being larger for samples connected directly to the wave guide.

• 4. Ultrasonic vibrations with the samples mounted directly on the wave guide substantially reduce the aluminum concentration in the surface of the coating.

• 5. Ultrasonic vibrations reduce the slope of the concentration curves, which indicates a larger effective diffusion coefficient (larger for the samples mounted directly on the wave guide).