Paper Information

Journal:   IRANIAN JOURNAL OF MATERIALS SCIENCE AND ENGINEERING   JUNE 2014 , Volume 11 , Number 2; Page(s) 1 To 13.
 
Paper: 

EFFECT OF ANNEALING ON MICROSTRUCTURE AND CORROSION PERFORMANCE OF ADBANDALBALLOYS

 
 
Author(s):  MOHAMMADNEJAD M., EHTESHAMZADEH M.*, SOROUSHIAN S.
 
* DEPARTMENT OF MATERIALS SCIENCE AND ENGINEERING, FACULTY OF ENGINEERING, SHAHID BAHONAR UNIVERSITY OF KERMAN, IRAN
 
Abstract: 

Microstructure and corrosion performance of admiralty brass (ADB) and aluminum brass (A LB) alloys ajier passing different annealing heat treatments were investigated using optical and scanning electron microscope, energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), DC polarization measurements and electrochemical impedance spectroscopy (EJS). The results showed that heat treating of ALB caused gradient in aluminum concentration across the grains that’s increased with increasing of annealing temperature. On the other hand, corrosion current density (icon J of ADB in 3.5%NaCl media decreased with increasing ojrec1ystallization, while ALB showed corrosion behavior inconsistent with ADB. The impedance measurements showed that corrosion rate of ADB decreased with increasing of exposure time from 0 to 15 days which could be related to the formation of Sn02 swface film and the S n-rich phases. While polarization resistance of ALB decreased by passing days in the corrosive media which could be associated to establishing of differential aluminum concentration cells.

 
Keyword(s): ADMIRALTY BRASS, ALUMINUM BRASS, ANNEALING, MICROSTRUCTURE, CORROSION RESISTANCE
 
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