Abstract
The mass transfer behavior of electroactive solutes from bulk solution to a metal surface under subcooled boiling and pool boiling conditions was investigated using a self designed novel pool-boiling device. This device employed hot oil circulation to heat the specimen until the nucleate boiling take place on the surface of the specimen. The electrochemical method was successfully employed to obtain the mass transfer rate on a boiling surface by measure limiting current density. The effects of subcooled boiling temperature and heat flux on mass transfer on surface were studied. The results show that under subcooled boiling condition the mass transfer coefficient is increasing with the increase of the solution temperature attribute to the increase of diffusion rate. Under pool boiling condition the mass transfer coefficient is increasing with the increase of heat flux when the heat flux is under 90 kW/m2 due to the enhancement of the bubble generated forced convection.
