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Octadecanethiol as corrosion inhibitor for zinc and patterned Zinc-Copper in humified air with Formic Acid
RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor.
2014 (English)In: Journal of the Electrochemical Society, ISSN 0013-4651, E-ISSN 1945-7111, Vol. 161, no 6, C330-C338 p.Article in journal (Refereed)
Abstract [en]

The corrosion inhibition efficiency of octadecanethiol (ODT) for zinc and a zinc-copper patterned model sample (Zn-Cu) has been explored during exposure in an atmosphere that mimics indoor atmospheric corrosion containing humidified air (80% relative humidity at 20◦C) and formic acid (around 100 ppb). The corrosion kinetics were monitored in situ with infrared reflection absorption spectroscopy, and the local nature of corrosion effects post-analyzed with complementary scanning electron microscopy, atomic force microscopy and confocal Raman spectroscopy. ODT shows initially a corrosion inhibiting ability both on zinc and on Zn-Cu. This ability decreases with time due to local removal of ODT, which causes micro-galvanic effects that eventually result in corrosion rates that exceed those for the uncovered samples. On bare and ODT-covered samples, the presence of a copper-zinc junction results in both accelerated corrosion and in structurally more developed corrosion products. Overall, the results suggest that ODT can function as a temporary corrosion inhibitor in representative indoor environments on zinc and zinc with zinc-copper junctions.

Place, publisher, year, edition, pages
2014. Vol. 161, no 6, C330-C338 p.
Keyword [en]
Octadecanethiol as corrosion inhibitor for zinc and patterned Zinc-Copper in humified air with Formic Acid
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-27046DOI: 10.1149/2.089406jesOAI: oai:DiVA.org:ri-27046DiVA: diva2:1054050
Note
A3439Available from: 2016-12-08 Created: 2016-12-08Bibliographically approved

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