Investigation of Hydrogen Production by using Zinc Coated Platinum Electrode in Phosphate Solutions

In this study, the hydrogen gas producing was investigated at 298 K with zinc coated platinum (Pt-Zn) electrode in 0.1 M NaH2PO4 solution (pH=12.3). Electrolysis, electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization techniques were used for the production of hydrogen gas. Scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX) and X-ray fluorescence (XRF) were used for the surface analysis of the electrodes.  A practical electrocatalytic experiment was designed to examine of hydrogen production by using a Zn plated Pt electrode and the efficiency of the hydrogen gas increased by 66.66% on the surface of the zinc coated platinum electrode

Inhibitor action of ascorbic acid on the corrosion of copper in alkaline medium

WOS: 000443172200009In this study, the effect of Ascorbic acid in the corrosion behaviour of copper has been investigated in 3.5% NaCl solution (pH=9.0) using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). Current-potential curve and Nyquist diagrams were obtained in different concentrations of ascorbic acid. The surface morphology of copper after their exposure to 3.5% NaCl solution with and without of ascorbic acid was examined by scanning electron microscopy (SEM). The obtained results show that; ascorbic acid inhibits corrosion of copper in 3.5% NaCl solution. Inhibition activity was determined to increase with decrease in the concentration of ascorbic acid

The Inhibition Effects of Methionine on Corrosion Behavior of Copper in 3.5% NaCl Solution at pH=8.5

WOS: 000326716200025The inhibition effect of methionine on the corrosion behaviour of copper was investigated in 3.5% NaCl solution with and without methionine. For this purpose, potentiodynamic polarization curves and electrochemical impedance spectroscopy (EIS) techniques were used. The surface morphology of the metal surface after exposed to corrosive medium was investigated by scanning electron microscopy (SEM). The effect of temperature has also studied in the temperature range from 298 K to 328 K. The effect of temperature has also studied in the temperature range from 298 K to 328 K. Some thermodynamic parameters were calculated and discussed. It was found that, methionine could inhibit the corrosion of copper in 3.5% NaCl solution. Methionine as a organic corrosion inhibitor for copper, and physically adsorbed molecules forming a protective film. Inhibition efficiency increases with decreasing methionine concentration and behaves as a mixed-type inhibitor.Cukurova UniversityCukurova University [FEF2010 YL51]The authors are greatly thankful to Cukurova University Research Found for financial support (project number of FEF2010 YL51)

Regular Expression Based Test Sequence Generation for HDL Program Validation

18th IEEE International Conference on Software Quality, Reliability and Security Companion (QRS-C) -- JUL 16-20, 2018 -- Lisbon, PORTUGALWOS: 000449555600090This paper proposes a test sequence generation approach for behavioral model validation of sequential circuits implemented in Hardware Description Language (HDL). In the procedure of test sequence generation proposed in this study, Regular Expressions (REs) are utilized to model the behavior of the System Under Test (SUT). First, the HDL program is converted to a Finite State Machine (FSM). Then, the obtained FSM is transformed to RE which is represented by a Syntax Tree (ST). In this way, the test sequence generation problem is simplified to the tree traversal algorithm in which symbol and operator coverage criteria are satisfied. The required tools for test sequence generation are provided to automatize the whole procedure of the proposed approach. Also, a running example, based on a real-life-like Traffic Light Controller (TLC), validates the proposed approach and analyzes its characteristic features.IEEE, IEEE Comp Soc, IEEE Reliabil So