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Home  > Raw materials & technologies  > Applications  > Protective & Marine coatings  > Corrosion protection of mild steel surfaces

Monday, 16 September 2019
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Raw materials & technologies, Applications, Protective & Marine coatings

Corrosion protection of mild steel surfaces

Wednesday, 1 November 2017

Indian researchers have reported the superior corrosion-resistant properties of conducting polyurethane networks of polyaniline (PANI), poly-m-aminophenol (PmAP), and poly-o-anisidine (PoA) coated on mild steel panels.

Corrosion protection of mild steel surfaces. Source: Pixabay

Corrosion protection of mild steel surfaces. Source: Pixabay

These networks were prepared by blending conducting polyanilines with isocyanate-containing prepolyurethanes.

PU-PANI shows best protection

Free-standing polyurethane films were obtained after a moisture cure for several days to ensure complete reaction of the excess isocyanate. The films were electrochemically active with conductivity in the range of 10−2 to 10−3 S/cm. The solution blends and formed films were characterised by infrared, ultraviolet, thermogravimetric analysis, and differential scanning calorimetry. Electrochemical corrosion studies showed excellent corrosion protection in the following order: PU-PANI > PU-PmAP > PU-PoA.

The study is published in: Journal of Applied Polymer Science, Volume 135, Issue 6, February 10, 2018.

Book tip:

The book Corrosion Protection brings together all the disciplines involved in the creation and use of protective coatings for metals. It presents the latest insights into the quality and chemistry of surfaces, the proper way to prepare them by conversion treatment, the function of resins and anticorrosion pigments in paints, and novel concepts in corrosion protection

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