Preparation and Corrosion Properties of Polyaniline Doped with Copper Phthalocyanine Disulfonic Acid

doi:10.11902/1005.4537.2015.149

Journal of Chinese Society for Corrosion and protection

2016, Vol. 36

Issue (4): 306-312 DOI: 10.11902/1005.4537.2015.149

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Preparation and Corrosion Properties of Polyaniline Doped with Copper Phthalocyanine Disulfonic Acid

Xiaobao LI,Li XU,Yihong LIU,Ting LIAO,Mingtian LI(

),Xuejun CUI

Key Laboratory of Material Corrosion and Protection of Sichuan Province, College of Materials Science and Engineering, Sichuan University of Science and Engineering, Zigong 643000,China

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Abstract

The copper phthalocyanine disulfonic acid CuPc-(SO₃H)₂ (CuPANI) was prepared with direct fast turquoise blue GL as raw material, and then the CuPANI doped polyaniline was obtained by chemical reaction of eigenstate polyaniline (EBPANI) with CuPc-(SO₃H)₂ in N,N′-dimethylformamide. The doped polyaniline was characterization by IR, UV-Vis and four point probe. The coatings with EBPANI or CuPANI as filler and epoxy resin 44 (EP-44) and 107 glue as adhesives were prepared on the surface of pretreated steel sheets, while the corrosion behavior of the sheets without and with coatings with EBPANI and CuPANI in 3.5%NaCl solution was investigated by electrochemical methods such as tafel polarization curve measurement, and alternating current impedance spectroscopy, respectively. The results indicated that the CuPANI doped polyaniline coating shows better anticorrosion performance.

Key words: coating polyaniline copper phthalocyanine disulfonic acid conduction anticorrosion

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	Xiaobao LI
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	Yihong LIU
	Ting LIAO
	Mingtian LI
	Xuejun CUI

Cite this article:

Xiaobao LI,Li XU,Yihong LIU,Ting LIAO,Mingtian LI,Xuejun CUI. Preparation and Corrosion Properties of Polyaniline Doped with Copper Phthalocyanine Disulfonic Acid. Journal of Chinese Society for Corrosion and protection, 2016, 36(4): 306-312.

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https://www.jcscp.org/EN/10.11902/1005.4537.2015.149 OR https://www.jcscp.org/EN/Y2016/V36/I4/306

Fig.1 IR spectra of EBPANI (a) and CuPANI (b)

Fig.2 UV-Vis spectra of EBPANI and CuPANI

Fig.3 TG curves of EBPANI and CuPANI

Fig.4 Cross cutting test results of CuPANI coating before (a) and after (b) 15 d immersion in 3.5%NaCl solution

Fig.5 Morphologies of EBPANI (a, b) and CuPANI (c, d) coatings before (a, c) and after (b, d) immersion in 5%HCl solution for 15 d

Fig.6 Morphologies of EBPANI (a, c, e) and CuPANI (b, d, f) coatings after neutral salt spray test for 3 d(a, b), 10 d (c, d) and 15 d (e, f)

Table 1 Results of neutral salt spray test of EBPANIand CuPANI coatings

Fig.7 Potentiodynamic polarization curves of PANI coat-ings in 3.5%NaCl solution

Table 2 Corrosion potential and current density ofcoating samples

Fig.8 EIS curves of PANI coatings in 3.5%NaCl solution

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