| Effect of TiB Addition on Corrosion Behavior of Titanium
Composites under Neutral Chloride Solution |
Ramkumar Thulasiram,1,* Selvakumar Mani,2 Mohanraj Murugesan,3
Chandrasekar Palanisamy4 and Gobi Saravanan Kaliaraj5
Pages : 155-160
DOI : 10.1080/0371750X.2019.1656548 |
| Abstract |
| In this work, the corrosion behavior of titanium composites of titanium-titanium
boride composites for marine applications was investigated by conducting
electrochemical polarization experiments in neutral chloride (3.5% NaCl) at room
temperature. The composites with two different volume fractions (20% and 40%)
of TiB were processed by three powder metallurgical techniques such as spark
plasma sintering, hot isostatic pressing and vacuum sintering. Corrosion rate for
all the processed composites was calculated from corrosion current density
determined by extrapolation of Tafel curves. Further, electrochemical impedance
spectroscopy analysis was also carried out for the composites. The results revealed
that the composite with 38.3 vol% titanium boride processed by hot isostatic
pressing exhibited improved corrosion resistance in neutral chloride solution
compared to the other two techniques. Microstructure of the corroded composites
showed the pit formation in the exposed surface.
[Keywords: Titanium-titanium boride composite, Corrosion, Neutral chloride, Spark
plasma sintering, Hot isostatic pressing, Vacuum sintering] |
| Full text : Subscribe to Download Full Text |
| [Go Back] |
|
