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Microstructural Characterisation and Corrosion Behaviour of Top Surface of Tig Welded 2219−t87 Aluminium Alloy
| Content Provider | Semantic Scholar |
|---|---|
| Author | Venkatasubramanian, Ganapriya Mideen, A. Sheik Jha, Abhay Kumar |
| Copyright Year | 2013 |
| Abstract | The microstructural characterisation and corrosion behaviour of top surface of tungsten inert gas (TIG) welded 2219−T87 aluminium alloy (AA2219–T87) in 0.6 M NaCl solution was studied by optical microscopy, scanning electron microscopy (SEM), potentiodynamic polarisation, and electrochemical impedance spectroscopy (EIS). The optical microscopy and SEM analyses revealed that the welding of base metal (BM) with ER2319 filler alloy caused the formation of micro pores and micro cracks on the surface of weld zone (WZ) while the welding heat caused the dissolution and segregation of CuAl2 intermetallic particles along the grain boundaries in the heat affected zone (HAZ). The anodic and cathodic branches of polarisation curves showed that the HAZ has lower corrosion resistance than WZ and BM. The decrease of charge transfer resistance of HAZ when compared to WZ and BM obtained by electrochemical impedance spectroscopy (EIS) further confirmed its higher corrosion rate in 0.6 M NaCl solution. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.idc-online.com/technical_references/pdfs/chemical_engineering/MICROSTRUCTURAL%20CHARACTERISATION.pdf |
| Alternate Webpage(s) | http://www.ijest.info/docs/IJEST13-05-03-080.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
