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Wednesday, 18 September 2019
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Raw materials & technologies, Technologies, Nanotechnology

Nano silver effects corrosion protection of polyurethane coatings

Monday, 16 June 2014

Iranian researchers investigated the effects of nanoparticulate silver on the corrosion protection performance of polyurethane coatings on mild steel.

The effects of nanoparticulate silver on the corrosion protection of PU coatings have been investigated

Source: Sergey Tokarev - Fotolia.com

The effects of nanoparticulate silver on the corrosion protection of PU coatings have been investigated

Source: Sergey Tokarev - Fotolia.com

They coated waterborne polyurethane (WPU) and high solid polyurethane (HPU) coatings containing nanoparticulate silver on mild steel and compared to the corresponding coatings without nanoparticulate silver in NaCl solution using electrochemical impedance spectroscopy (EIS).

Nano silver in WPU showed corrosion protection reduction

The EIS results showed WPU coating degradation in the presence of nanoparticulate silver, while inclusion of nanoparticulate silver in HPU coating revealed no significant effect on the coating resistance. The WPU and HPU coatings morphology was investigated by SEM cross-section, which showed loss of WPU coating integrity in the presence of nanoparticulate silver, while no significant effect was observed for the HPU coating. The dual behaviour of nanoparticulate silver in WPU and HPU coatings was connected to their different chemical structures confirmed by FTIR spectroscopy.

The study is published in: Progress in Organic Coatings, volume 77, issue 8, August 2014, pages 1233-1240

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