Surface-enhanced Raman scattering and atomic force microscopy of brass electrodes in sulfuric acid solution containing benzotriazole and chloride ion

Journal Article · Fri Jan 01 04:00:00 EST 1993 · Applied Spectroscopy; (United States)

DOI:https://doi.org/10.1366/0003702934048541· OSTI ID:6951544

Rubim, J C; Kim, J; Henderson, E; Cotton, T M ^[1]

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1. Instituto de Quimica da Universidade de Sao Paulo (Brazil) Ames Lab., IA (United States) Iowa State Univ., Ames (United States)

Three different methods were used to roughen brass (Cu/Zn = 67/33) electrodes in 0.5 M H[sub 2]SO[sub 4] containing 1.0 mM benzotriazole (BTAH): (1) polarization at +0.05 V vs. saturated calomel for 5 min; (2) immersion in the above solution for six hours; and (3) oxidation-reduction cycling in the presence of chloride ion. The surfaces prepared by the first two methods exhibited surface-enhanced Raman scattering (SERS) spectra of the polymeric complex [Cu(I)BTA][sub s]. The SERS spectrum obtained from electrodes prepared by the third method is very similar to that of [Cu(I)CIBTAH][sub 4]. Examination of the electrodes by atomic force microscopy (AFM) showed that a large number of grain boundary sites are formed by the roughening processes. This effect is attributed to the loss of zinc, which occurs during corrosion of the mirror-like, polished brass electrode surface in the sulfuric acid solution. 11 refs., 5 figs.

• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 6951544
• Journal Information: Applied Spectroscopy; (United States), Journal Name: Applied Spectroscopy; (United States) Vol. 47:1; ISSN 0003-7028; ISSN APSPA4
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360105 -- Metals & Alloys-- Corrosion & Erosion
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102* -- Chemical & Spectral Procedures
400400 -- Electrochemistry
ALLOYS
AZOLES
BRASS
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
COMPLEXES
COPPER ALLOYS
COPPER BASE ALLOYS
COPPER COMPLEXES
CORROSION
ELECTRODES
HALIDES
HALOGEN COMPOUNDS
HETEROCYCLIC COMPOUNDS
INORGANIC POLYMERS
LASER SPECTROSCOPY
MICROSCOPY
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXIDATION
POLYMERS
RAMAN EFFECT
RAMAN SPECTROSCOPY
REDUCTION
SPECTROSCOPY
SURFACE PROPERTIES
TRANSITION ELEMENT COMPLEXES
TRIAZOLES
ZINC ALLOYS