Chemical Behavior And Corrosion Inhibition Of Zinc Electrode In Phosphate Solutions Under Open Circuit Conditions | ||
| The International Conference on Chemical and Environmental Engineering | ||
| Article 8, Volume 7, 7th International Conference on Chemical & Environmental Engineering, May 2014, Pages 1-14 PDF (605.92 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/iccee.2014.35421 | ||
| Authors | ||
| S. Abd El Wanees1; Y. Atef2 | ||
| 1Chemistry Department, Zagazig University, Zagazig, Egypt. | ||
| 2Chemistry Administration, Cairo†, Egypt. | ||
| Abstract | ||
| Abstract: The electrochemical behavior of zinc electrode has been studied in different concentrations of Na3PO4.12H2O solution using a simple potentiometric method. The study involves the measurement of the electrode potentials under open-circuit conditions. The potential was followed as a function of both time and Na3PO4.12H2O solution concentration until the values of steady-state potential are obtained. The steady potential changed on the addition of increasing amounts of different aggressive anions due to the breakdown of passivity. The way of variation of the steady-state potentials of zinc electrode in aggressive solutions upon the addition of increasing quantities of some inhibitors as the type of inorganic inhibitors are also concerned. The potential shifts towards more positive values the addition of inhibitors and the potential curves recall those reported in aggressive anion-free solution indicating pitting corrosion. The micrograph of zinc surface in presence of different concentrations of aggressive ions was investigated using Scanning Electron Microscope SEM. | ||
| Keywords | ||
| zinc; Sodium phosphate; Corrosion; inhibitors and Potential time | ||
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