Title: Dezincification Rate of β-Brass in Vacuum at High Temperature
Abstract:The dezincification rate of β-brass in vacuum has been measured by the thermobalance method over a temperature range 500 to 800°C. The effects of Ag, Mg, Al, Mn, Si, Ge, Sn and Ni as alloying elements...The dezincification rate of β-brass in vacuum has been measured by the thermobalance method over a temperature range 500 to 800°C. The effects of Ag, Mg, Al, Mn, Si, Ge, Sn and Ni as alloying elements was also studied. The results were discussed in comparison with the case of α-brass reported previously. Results are summarized as follows:(1) The dezincification rate of β-brass obeyed the parabolic rate law as was expected from the diffusion-controlled mechanism, while in the case of α-brass with 30 wt% Zn the amount of weight-loss was proportional to time.(2) The dezincified β-brass layer consisted of two parts observed in α-brass with 30 wt% Zn, one of them near the specimen surface was more porous.(3) Additions of Si, Ge, Sn and Al increased the rate of dezincification, while no effect was observed by additions of Ag, Mg, Mn and Ni. The effect of each alloying element on the dezincification rate of β-brass was smaller than that observed in α-brass.Read More