APPLICATION OF MONOCARBOXYLIC SALT FOR PROTECTING LEAD AGAINST CORROSION

1 PECENOVÁ Zuzana
Co-authors:
1 KOUŘIL Milan 1 PRCHALOVÁ Lucie
Institution:
1 University of Chemistry and Technology in Prague, Czech Republic, EU
Conference:
25th Anniversary International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 25th - 27th 2016
Proceedings:
Proceedings 25th Anniversary International Conference on Metallurgy and Materials
Pages:
1139-1144
ISBN:
978-80-87294-67-3
ISSN:
2694-9296
Published:
14th December 2016
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
59 views / 17 downloads
Abstract

Currently, the hot topic in restoration and conservation of metals is the application of corrosion inhibitors intended for protection of lead. Our research aims in selection of suitable protection system which would be applicable for conservation of historical lead seals. Commonly, the seals are stored in archives together with documents to which the seal are attached. Vapour organic acids, acetic acid being a typical example, are the most aggressive pollutants in the archives environment considering corrosion of lead. The research was focused on determination of the inhibition efficiency after various manners of lead coupons pre-treatment (corroded and electrochemically cleaned). Sodium undecanoate was used as the inhibitor in concentration of 0.01 and 0.05 mol/l. The solution was applied by immersion for 24 h. Polarization resistance measurement and electrical resistance technique were used to evaluate inhibition efficiency in neutralised acetic acid environment. Artificially created corrosion products were analysed by X-ray diffraction analysis. Electrochemical cleaning of the surface provided high inhibition efficiency of the sodium undecanoate solution (0.05 mol/l). In general, the inhibitor was more efficient at higher concentration. It formed a layer of hydrophobic properties. Unfortunately, disadvantage of this layer is its low abrasion resistance.

Keywords: Corrosion inhibitor, lead seals, sodium undecanoate, polarization resistance

© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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