Natural products for materials protection: Corrosion protection of aluminium in hydrochloric acid by Kola nitida extract

The ethanol extract of Kola nitida seed (KN extract) was investigated for its ability to mitigate the corrosion of aluminium alloy AA3003 in acidic environment using joint experimental and computational approach. The obtained results revealed that KN extract hindered the corrosion reaction. The effe...

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Bibliographic Details
Published inJournal of molecular liquids Vol. 219; pp. 417 - 424
Main Authors Njoku, Demian I., Ukaga, Ike, Ikenna, Onyeachu B., Oguzie, Emeka E., Oguzie, Kanayo L., Ibisi, Nkechi
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.07.2016
Subjects
Adsorption
Aluminium alloy
Biomass extracts
Corrosion inhibition
Kola nitida
Biomass extracts
Aluminium alloy
Corrosion inhibition
Adsorption
Kola nitida
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Summary:The ethanol extract of Kola nitida seed (KN extract) was investigated for its ability to mitigate the corrosion of aluminium alloy AA3003 in acidic environment using joint experimental and computational approach. The obtained results revealed that KN extract hindered the corrosion reaction. The effectiveness of protection became more pronounced with increasing extract concentration but decreased with prolonged exposure time. Electrochemical data showed that organic constituents of the extract adsorbed on the Al surface, in agreement with the Langmuir equation and reduced the anodic and cathodic current densities. Computational simulations were adopted to visualize the adsorption of various constituents of KN extract on Al (110) slab. [Display omitted] •Kola nitida seeds extract effectively inhibited aluminium corrosion in 0.1M HCl.•Some organic constituents have similar electronic structures to conventional inhibitors.•Organic constituents hindered the anodic and cathodic reactions via adsorption.•Molecular dynamics simulation reveals flat lying adsorption of the constituents.•The constituents show strong adsorption on aluminium surface.
ISSN:0167-7322
1873-3166
DOI:10.1016/j.molliq.2016.03.049