Self-assembled layers of alkanethiols on copper for protection against corrosion

Journal Article · Mon Feb 01 00:00:00 EST 1993 · Journal of the Electrochemical Society; (United States)

DOI:https://doi.org/10.1149/1.2221064· OSTI ID:6449173

Yamamoto, Yuichi; Nishihara, Hiroshi; Aramaki, Kunitsugu ^[1]

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1. Keio Univ., Yokohama (Japan)

Self-assembled monolayers of alkanethiols C[sub n]H[sub 2n+1]SH(n = 6 [approximately] 18) adsorbed on the surface of a polycrystalline bulk cu were constructed and characterized by x-ray photoelectron (XPS) and surface-enhanced Raman scattering (SERS) spectroscopy and contact angle and impedance measurements. The protection ability of the alkanethiol monolayers against Cu corrosion in an aerated 0.5 M Na[sub 2]SO[sub 4] solution was examined by impedance and polarization techniques. Results of XPS, SERS, and contact angle measurements showed that alkanethiols were chemisorbed on the Cu surface by the formation of strong bonds between Cu and S atoms following cleavage of a S-H bond and formed densely packed, water-repellent monolayers on the surface. The advancing contact angle of these monolayer films was comparable to that of alkanethiolate monolayers adsorbed at a vapor-deposited Cu on a Si wafer. However, sufficiently high protection abilities of the films against Cu corrosion were not obtained in 0.5 M Na[sub 2]SO[sub 4]. A preliminary experiment demonstrated the formation of a promising protective film which was prepared on the Cu surface by modification of self-assembled 11-mercapto-1undecanol monolayer with octyltrichlorosilane to form cross-linkages between the thiol molecules with siloxane bonds.

• OSTI ID: 6449173
• Journal Information: Journal of the Electrochemical Society; (United States), Vol. 140:2; ISSN 0013-4651
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COPPER
CORROSION PROTECTION
THIOLS
CORROSION RESISTANCE
ADSORPTION
CHEMISORPTION
EXPERIMENTAL DATA
LAYERS
MATERIALS TESTING
PHOTOELECTRON SPECTROSCOPY
POLYCRYSTALS
RAMAN SPECTROSCOPY
SODIUM SULFATES
X-RAY SPECTROSCOPY
ALKALI METAL COMPOUNDS
CHEMICAL REACTIONS
CRYSTALS
DATA
ELECTRON SPECTROSCOPY
ELEMENTS
INFORMATION
LASER SPECTROSCOPY
METALS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXYGEN COMPOUNDS
SEPARATION PROCESSES
SODIUM COMPOUNDS
SORPTION
SPECTROSCOPY
SULFATES
SULFUR COMPOUNDS
TESTING
TRANSITION ELEMENTS
360105* - Metals & Alloys- Corrosion & Erosion