Electrochemical behavior of Ni-Al-Fe alloys in simulated human body solution |
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Authors: | I E Castañeda J G Gonzalez-Rodriguez J Colin M A Neri-Flores |
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Institution: | 1. CIMAV, Complejo Industrial Chihuahua, Chihuahua, Mexico 2. Centro de Investigación en Ingeniería y Ciencias Aplicadas, UAEM, Av. Universidad 1001, Col. Chamilpa, Cuernavaca Mor., Mexico 3. Facultad de Ciencias Quimicas e Ingeniería, UAEM, Av. Universidad 1001, Col. Chamilpa, Cuernavaca Mor., Mexico
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Abstract: | An investigation about the corrosion resistance of Ni-Al-Fe intermetallic alloys in simulated human body fluid environments
has been carried out using electrochemical techniques. Tested alloys included 57 (wt%) Ni-(20 to 30) Al-(12 to 23) Fe using
the Hank's solution because the high corrosion resistance provided by protective Al2O3 external layer. For comparison, AISI 316L type stainless steel has also been used. Electrochemical techniques included potentiodynamic
polarization curves, electrochemical impedance spectroscopy, and electrochemical noise measurements. The different techniques
have shown that these alloys showed a similar or higher corrosion resistance than conventional AISI 316L type stainless steel,
and this corrosion resistance decreased as the Al content in the alloy increased. The alloys were susceptible to pitting type
of corrosion on the interdendritic Ni-rich phases. |
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Keywords: | |
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