Synergistic effect of iodide ion and 1-(2H)-phthalazinone on galvanic corrosion of aluminum and mild steel in 1.0 M HCl

Ahmed Y. Musa, Norhamidi Muhamad, Lim Tien Tien, Eng Pei Chee

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Abstract

The corrosion inhibitive effects of 1-(2H)-phthalazinone (PTO) on the coupled metals of aluminium and mild steel in 1.0 M HCl solution and the synergistic influence of potassium iodide (KI) on the inhibition efficiency were assessed. The galvanic potential and galvanic current were measured in blank solution, presence of 1 mM of PTO, presence of 0.1% KI and combination of PTO and KI. Result showed that the presence of PTO has significantly reduced galvanic current from 1160 μA cm -2 to 69.9 μA cm -2. In addition, the presence of both PTO and KI in solution decreased the galvanic current to value even further to 0.75 μA cm -2 while the galvanic current increased to -2000 μA cm -2 in presence of KI alone in the solution,.

Original languageEnglish
Pages (from-to)5298-5304
Number of pages7
JournalInternational Journal of Electrochemical Science
Volume6
Issue number11
Publication statusPublished - Nov 2011

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Iodides
Aluminum
Carbon steel
Ions
Corrosion
Potassium iodide
Potassium Iodide
Metals

ASJC Scopus subject areas

  • Electrochemistry

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Synergistic effect of iodide ion and 1-(2H)-phthalazinone on galvanic corrosion of aluminum and mild steel in 1.0 M HCl. / Musa, Ahmed Y.; Muhamad, Norhamidi; Tien, Lim Tien; Chee, Eng Pei.

In: International Journal of Electrochemical Science, Vol. 6, No. 11, 11.2011, p. 5298-5304.

Research output: Contribution to journalArticle

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abstract = "The corrosion inhibitive effects of 1-(2H)-phthalazinone (PTO) on the coupled metals of aluminium and mild steel in 1.0 M HCl solution and the synergistic influence of potassium iodide (KI) on the inhibition efficiency were assessed. The galvanic potential and galvanic current were measured in blank solution, presence of 1 mM of PTO, presence of 0.1{\%} KI and combination of PTO and KI. Result showed that the presence of PTO has significantly reduced galvanic current from 1160 μA cm -2 to 69.9 μA cm -2. In addition, the presence of both PTO and KI in solution decreased the galvanic current to value even further to 0.75 μA cm -2 while the galvanic current increased to -2000 μA cm -2 in presence of KI alone in the solution,.",
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