Surface enhanced Raman scattering and impedance studies on the inhibition of copper corrosion in sulphate solutions by 5-substituted benzotriazoles

The inhibition mechanisms of benzotriazole and its 5-methyl, 5-chloro and 5-nitro derivatives were investigated for copper corrosion in sulphate solutions at several values of pH by an impedance technique and surface enchanced Raman scattering spectroscopy. Protective films of cuprous complex polyme...

Full description

Saved in:
Bibliographic Details
Published in:Corrosion science 1991-01, Vol.32 (5), p.593-607
Main Authors: Aramaki, Kunitsugu, Kiuchi, Takehiro, Sumiyoshi, Takashi, Nishihara, Hiroshi
Format: Article
Language:English
Subjects:
Applied sciences
Corrosion
Corrosion prevention
Exact sciences and technology
Metals. Metallurgy
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The inhibition mechanisms of benzotriazole and its 5-methyl, 5-chloro and 5-nitro derivatives were investigated for copper corrosion in sulphate solutions at several values of pH by an impedance technique and surface enchanced Raman scattering spectroscopy. Protective films of cuprous complex polymers of the inhibitors were readily formed on the copper surface at high pH values and noble potential. The ease of complex formation was estimated to decrease in the order, 5-chlorobenzotriazole > benzotriazole ∼ 5-methylbenzotriazole > 5-nitrobenzotriazole. The order agreed with that of the inhibition efficiencies in the neutral solution.
ISSN:0010-938X
1879-0496
DOI:10.1016/0010-938X(91)90109-3