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Citation: ZHU Zhi-Liang, YUAN Li-Li, GAO Jun-Ying, ZHANG Rong-Hua, LI Feng-Ting. SERS Study on the Corrosion Inhibition of Poly(aspartic acid)[J]. Chinese Journal of Applied Chemistry, ;2004, 21(9): 969-970. shu

SERS Study on the Corrosion Inhibition of Poly(aspartic acid)

1.
a School of Environmental Science and Engineering, Tongji University, Shanghai 200092;
2.
b Department of Chemistry, Tongji University, Shanghai 200092

Corresponding author: ZHU Zhi-Liang,
Received Date: 6 August 2003
Available Online: 22 February 2004
Fund Project: 教育部骨干教师资助计划资助(GG-430-10247-1218) (GG-430-10247-1218)

Polyaspartic acid(PASP) was synthesized by polycondensate of L-aspartic acid using H₃PO₄ as a catalyst. The corrosion inhibition performance of PASP on carbon steel was studied by a rotating hanging slice method. The results showed that the corrosion inhibitory efficiency rose with the increasing of the concentration of PASP. It also indicated that the highest corrosion inhibitory efficiency reached 93% when the concentration of PASP was 100 mg/L. The strong adsorption signal of PASP on the carbon steel surfaces was detected by surface-enhanced Raman scattering(SERS) technique. The results suggested that the high corrosion inhibitory efficiency appeared owing to the chemical adsorption of carboxyl groups in PASP on steel surface.
- polyaspartic acid,
- corrosion inhibition,
- surface-enhanced Raman scattering
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