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Inhibitive effect of sodium eperuate on zinc corrosion in alkaline solutions

Li, M.C. / Royer, M. / Stien, D. / Lecante, A. / Roos, C.

The effect of sodium eperuate prepared from Wallaba (Eperua falcata Aubl) extract (0.3 - 2g/l) on zinc corrosion was investigated in alkaline solutions with chloride ions (i.e., simulated concrete pore solutions) by using electrochemical techniques. Sodium eperuate inhibits the corrosion of zinc in 0.1 M NaCl solutions with pH 9.6. As its concentration increases to 1 g/L, the inhibition efficiency reaches approximately 92%. In alkaline solutions with pH 12.6, sodium eperuate has no adverse effect on passivity of zinc, and retards the chloride attack. These suggest that sodium eperuate is an effective inhibitor for the protection of zinc in alkaline environments and is suitable to be added to the fresh concrete, without adverse effect on passivity of zinc.

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Inhibitive effect of sodium eperuate on zinc corrosion in alkaline solutions

Li, M.C. / Royer, M. / Stien, D. / Lecante, A. / Roos, C.

The effect of sodium eperuate prepared from Wallaba (Eperua falcata Aubl) extract (0.3 - 2g/l) on zinc corrosion was investigated in alkaline solutions with chloride ions (i.e., simulated concrete pore solutions) by using electrochemical techniques. Sodium eperuate inhibits the corrosion of zinc in 0.1 M NaCl solutions with pH 9.6. As its concentration increases to 1 g/L, the inhibition efficiency reaches approximately 92%. In alkaline solutions with pH 12.6, sodium eperuate has no adverse effect on passivity of zinc, and retards the chloride attack. These suggest that sodium eperuate is an effective inhibitor for the protection of zinc in alkaline environments and is suitable to be added to the fresh concrete, without adverse effect on passivity of zinc.

Inhibitive effect of sodium eperuate on zinc corrosion in alkaline solutions

Li, M.C. / Royer, M. / Stien, D. / Lecante, A. / Roos, C.

The effect of sodium eperuate prepared from Wallaba (Eperua falcata Aubl) extract (0.3 - 2g/l) on zinc corrosion was investigated in alkaline solutions with chloride ions (i.e., simulated concrete pore solutions) by using electrochemical techniques. Sodium eperuate inhibits the corrosion of zinc in 0.1 M NaCl solutions with pH 9.6. As its concentration increases to 1 g/L, the inhibition efficiency reaches approximately 92%. In alkaline solutions with pH 12.6, sodium eperuate has no adverse effect on passivity of zinc, and retards the chloride attack. These suggest that sodium eperuate is an effective inhibitor for the protection of zinc in alkaline environments and is suitable to be added to the fresh concrete, without adverse effect on passivity of zinc.

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Title:

Inhibitive effect of sodium eperuate on zinc corrosion in alkaline solutions

Additional title:

Inhibitorwirkung von Natrium-Eperuat (Extrakt des Wallaba-Baumes) auf die Zinkkorrosion in alkalischen Lösungen

Contributors:

Li, M.C. (author) / Royer, M. (author) / Stien, D. (author) / Lecante, A. (author) / Roos, C. (author)

Published in:

Corrosion Science ; 50 ; 1975-1981

Publication date:

2008

Size:

7 Seiten

ISSN:

DOI:

https://doi.org/10.1016/j.corsci.2008.04.019

Type of media:

Article (Journal)

Type of material:

Print

Language:

English

Keywords:

Korrosionsinhibitor , Zink , alkalisches Medium , Natriumchlorid , Pflanzenextrakt , Baum (Pflanze) , Molekularstruktur , Simulationsversuch , Porenlösung , Beton , Konzentrationseinfluss , pH-Einfluss , Polarisationskurve , Korrosionsbeständigkeit , elektrochemische Impedanzspektrometrie

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