PROTECTION OF LEAD IN ACETIC ACID CONTAINING AIR BY MEANS OF CORROSION INHIBITORS

1 STRACHOTOVÁ Kristýna Charlotte
Co-authors:
2 KUCHŤÁKOVÁ Klára 2 KOUŘIL Milan 2 MSALLAMOVÁ Šárka
Institutions:
1 University of Chemistry and Technology, Prague, Department of Metals and Corrosion Engineering, Prague, Czech Republic, EU, strachok@vscht.cz
2 University of Chemistry and Technology, Prague, Department of Metals and Corrosion Engineering, Prague, Czech Republic, EU, kourilm@vscht.cz
Conference:
27th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 23rd - 25th 2018
Proceedings:
Proceedings 27th International Conference on Metallurgy and Materials
Pages:
1045-1050
ISBN:
978-80-87294-84-0
ISSN:
2694-9296
Published:
24th October 2018
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
15 views / 3 downloads
Abstract

Lead bulls are often stored in an inappropriate environment with the presence of organic acids to which lead is sensitive. The aim of this work was to test compounds inhibiting the lead corrosion due to acetic acid vapours. Ideally those that will have better application and surface properties than the widely tested carboxylic acid salts. Benztriazole, cyclohexylamine, thiourea and sodium benzoate were used. The effect of individual inhibitors was tested by the resistometric method on the non-treated surface for 2 hours immersed in the inhibitor solution and on the surface coated with the carbonate-based corrosion products with an immersion time in inhibitor for 2 hours. Resistometric sensors with different surface treatment were exposed to atmosphere above acetic acid solution in concentration 0.001 moll-1. To evaluate the appearance and characteristics of the lead surface after treatment of the inhibitor, the samples prepared in the same way were used. It has been found that all of the used substances form a protective layer over the lead. The highest efficiency was achieved by cyclohexylamine. The smallest surface changes occurred in benztriazole.

Keywords: Lead corrosion, inhibition, conservation
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