Effect of Nanoparticle Addition in Hybrid Sol-Gel Silane Coating on Corrosion Resistance of Low Carbon Steel

Poovarasi Balan; Aaron Ng; Chee Beng Siang; R.K. Singh Raman; Eng Seng Chan

doi:10.4028/www.scientific.net/AMR.686.244

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 686Effect of Nanoparticle Addition in Hybrid Sol-Gel...

Effect of Nanoparticle Addition in Hybrid Sol-Gel Silane Coating on Corrosion Resistance of Low Carbon Steel

Abstract:

Chromium pre-treatments of metal have been replaced by silane pre-treatments as more environmental friendly option. Nanoparticles can be added in the silane sol-gel network have been reported to improve corrosion resistance. In this work, the electrochemical corrosion resistance of low carbon steel coated with hybrid organic-inorganic sol-gel film filled with nanoparticles was evaluated. The sol-gel films have been synthesized from 3-glycidoxy-propyl-trimethoxy-silane (3-GPTMS) and tetra-ethyl-ortho-silicate (TEOS) precursors. These films have been impregnated with 300 ppm of silica or alumina nanoparticles. The electrochemical behavior of the coated steel was evaluated by means of electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM). Equivalent circuit modeling, used for quantifying the EIS measurements showed that sol-gel films containing silica nanoparticles improved the barrier properties of the silane coating. The silica nanoparticle-containing films showed highest initial pore resistance over the five days of immersion in 0.05M NaCl.

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Periodical:

Advanced Materials Research (Volume 686)

Pages:

244-249

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.686.244

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Online since:

April 2013

Authors:

Poovarasi Balan, Aaron Ng, Chee Beng Siang, R.K. Singh Raman, Eng Seng Chan

Keywords:

Alumina Nanoparticles, EIS, Low Carbon Steel, SEM, Silane, Silica Nanoparticles

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