In this work, it was developed the construction of a potentiostat for the execution of Electrochemical Impedance Spectroscopy (EIS) experiments, using an Agilent 33220a signal generator, a RIGOL 1064b oscilloscope and a protoboard for the connection of operational amplifiers to an electrochemical cell. The coordination of the global operation, in addition to data acquisition, was performed using a code generated in the LabVIEW program. The system analyzed was the corrosion of an 1100 aluminum plate in water, in order to compare the results obtained by other authors. The data acquisition consisted in obtaining the values of amplitude, RMS voltage and phase angle between the generated power signals and the current output, in order to obtain the impedance of the system, for different signal frequencies. Finally, the values obtained were plotted on a Nyquist diagram. In this way, the objective of this article is to demonstrate that with conventional laboratory equipment it is possible to implement an experimental device, capable of delivering results similar to those obtained by commercial equipment.
References
[1]
Rodríguez, J. and Ruiz, S. (2003) Medidor de Impedancia Electroquímica [Electrochemical Impedance Measurer]. Universidad Industrial de Santander, Facultad de Ingeniería Físico Mecánicos, Escuela de Ingenierías Eléctrica, Electrónica y Telecomunicaciones, Bucamarga.
Carlos, H. (2004) Aplicación de la técnica de Espectroscopía de Impedancia en el estudio del comportamiento electroquímico del sistema acero—concreto bajo inmersión parcial aireada. [Impedance Spectroscopy Application in the Study of the Electrochemical Behavior of the Steel—Concrete System under Partially Aerated Systems.]
[5]
Amol Srivastava (2016) A Presentation on Electrochemical Impedence Spectroscopy for Surface Coating Evaluation Amol Srivastava, 3B. Tech Paint Technology, HBTI, Kanpur.
[6]
Lab Course Manual (2002) Capacitive Properties of a Gold/Electrolyte Interface. Physik E19 (AG Krischer), Technische Universität München, München.
[7]
Saavedra, R.M. (2014) Simulación mediante circuitos equivalentes de la impedancia electroquímica de armaduras de acero inoxidable en mortero [Equivalent Circuit Simulation for the Electrochemical Impedance of Stainless Steel Armors in Mortars]. Universidad Carlos III de Madrid Escuela Politécnica Superior Dpto. de Ciencia de los Materiales e Ingeniería Química.
[8]
Villagrasa, J.P., Colomer-Farrarons, J. and Miribel, P.L. (2013) Bioelectronics for Amperometric Biosensors.
[9]
Ardila, L.F., Estupiñán, H.A., Vásquez, C. and Peña, D.Y. (2011) Study of Hydrolytic Biodegradation of Biopolymers/Ceramic Coatings by EQCM, Ingeniera Química UIS. Magister en Ingeniería de Materiales. Escuela de Ingeniería Metalúrgica y Ciencia de Materiales. UIS. GIC.
[10]
Keysight Technologies (2015) Keysight Technologies Comparison: 33220A/33250A to 33500B/33600A Trueform Series Waveform Generators, Migration Guide.
[11]
Rigol Technologies (2009) RIGOL User’s Guide DS1000B Series Digital Oscilloscopes DS1062/4B, DS1102/4B, DS1202/4B Dec. 2009 RIGOL Technologies, Inc., Suzhou.
[12]
Massachusetts Institute of Technology (2011) State Machines
https://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-01sc-introduction-to-electrical-engineering-and-computer-science-i-spring-2011/unit-1-software-engineering/state-machines/MIT6_01SCS11_chap04.pdf
[13]
Rigol Technologies (2014) RIGOL Programming Guide DS1000B Series Digital Oscilloscope DS1204B/DS1104B/DS1064B Dec. 2009RIGOL Technologies, Inc., Suzhou.
[14]
Metrohm Autolab (2008) Potentiostats, Principles of Operation.
www.autolab-instruments.com
[15]
determinación de la velocidad de corrosion de latón al aluminio en agua potable. M.B. Valcarce, M.Vázquez y S.R. de Sánchez División Corrosión, INTEMA, Facultad de Ingeniería, UNMdP Juan B. Justo 4302-B7608FDQ Mar del Plata-Argentina. [Determination of the Corrosion Rate of Aluminium Brass in Drinkable Water]
[16]
Nichicon Corporation (2015) General Descriptions of Aluminum Electrolytic Capacitors. Nichicon Corporation, Kyoto.
