Anticorrosion Coatings from Poly (Aniline-co-2-Ethylaniline) Micro/Nanostructures
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PANI copolymer micro/nanostructures with different surface wettability were obtained from the chemical oxidation copolymerization of aniline (Ani) with 2-ethyl aniline (EA) at diverse [EA]/[Ani+EA] molar ratios, by employing ammonium persulfate as an oxidant. The results revealed that the poly (aniline-co-2-ethyl aniline) (PANI-EA) copolymer micro/nanostructures exhibited satisfactory anticorrosion performance for carbon steel, and the corrosion protection efficiency increased with the increase of water repellent property. Poly (2-ethyl aniline) (PEA) showed the largest contact angle (CA=145°) and show the best corrosion protection for the carbon steel (η = 87.29%). It is found that the superior anticorrosion property of PEA is attributed to its high hydrophobicity, low conductivity and low porosity.
Key wordspolyaniline poly (aniline-co-2-ethylaniline) micro/nanostructures corrosion protection wettability
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The authors appreciate the financial supports of the National Natural Science Foundation of China (No. 41476059) and the Natural Science Foundation of Hebei Province (No. E2018108011).
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