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EFFECT OF DEZINCIFICATION PROCESS OF Α-BRASS ALLOYS ON THE WEARING RESISTANCE | ||
| AL-TAQANI | ||
| Article 1, Volume 23, Issue 1, 2010, Pages 152-163 | ||
| Author | ||
| Abdul -Wahab Hassan Khuder | ||
| Abstract | ||
| The aim of this paper is to study the effect of dezincification process of brass alloys which contains different percentages of zinc 5, 10, 20 & 30 % on the wearing resistance. Dezincification process was carried out in electrical furnace under a protective atmosphere at different temperatures750, 850 & 950 oC for different periods of time 10,20,40,80 &120 hrs. The weight loss was measured before and after dezincification process. A relationship has been achieved between the weight loss per unit area (ΔW/A) and the dezincification time at different temperatures and zinc concentration. The results show that the dezincification process is diffusion controlled. A mathematical relationship between zinc concentration and dezincification constant (D) was also achieved. It was found that the dezincification constant values are concentration and temperature dependent. Also the activation energy (Q) for dezincification process increases with increasing zinc concentration. | ||
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