Zairyo-to-Kankyo
Online ISSN : 1881-9664
Print ISSN : 0917-0480
Effects of Total Fluoride Concentration and Solution pH on the Corrosion Behavior and Pitting Potential for Fe in Aqueous Solutions
Osamu YamazakiOsamu Matsuura
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1996 Volume 45 Issue 9 Pages 546-550

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Abstract

Corrosion behavior and pitting potential for Fe in aqueous fluoride solutions were investigated by potentiodynamic and potentiostatic polarization measurements. It was found that the solution pH and total fluoride concentration, [F]total affect the pitting potential which moves to more noble direction with decreasing [F]total and increasing pH values. Furthermore, it was found that the chemical morphology of fluoride in solution affects the corrosion behavior of Fe. Uniform dissolution is observed in HF, active state pits occur in HF+F- and polishing state pits occur in F-.

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© Japan Society of Corrosion Engineering
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