Synthesis and Corrosion Inhibition Performance of Polyatyrolsulfon-acid Doped Polyaniline

doi:10.11902/1005.4537.2014.199

Journal of Chinese Society for Corrosion and protection

2015, Vol. 35

Issue (6): 519-524 DOI: 10.11902/1005.4537.2014.199

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Synthesis and Corrosion Inhibition Performance of Polyatyrolsulfon-acid Doped Polyaniline

Wenjing LV,Yingjun ZHANG,Chao SHI,Yawei SHAO(

),Yanqiu WANG,Guozhe MENG

Corrosion and Protection Laboratory, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China

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Abstract

Polyatyrolsulfon acid doped polyaniline (PSSA-PANI) was synthesized by emulsion polymerization method, and then was characterized by IR spectra and XPS. The synthesized PSSA-PANI exhibited good solubility in water. The corrosion inhibition performance of the PSSA-PANI on mild steel was examined in acidic NaCl solutions by means of electrochemical impedance spectroscopy (EIS). The results revealed that PSSA-PANI had a high conductivity. In the synthesized PSSA-PANI, PSSA existed in two states, namely doped-state and free-state, PSSA can improve not only the conductivity but also the water solubility of PANI. The PSSA-PANI showed good corrosion inhibition for 20# steel in acidic NaCl media with an inhibition efficiency over 80%.

Key words: conductive polymer water-soluble PSSA-PANI doped XPS corrosion inhibition

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	Wenjing LV
	Yingjun ZHANG
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	Yawei SHAO
	Yanqiu WANG
	Guozhe MENG

Cite this article:

Wenjing LV,Yingjun ZHANG,Chao SHI,Yawei SHAO,Yanqiu WANG,Guozhe MENG. Synthesis and Corrosion Inhibition Performance of Polyatyrolsulfon-acid Doped Polyaniline. Journal of Chinese Society for Corrosion and protection, 2015, 35(6): 519-524.

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https://www.jcscp.org/EN/10.11902/1005.4537.2014.199 OR https://www.jcscp.org/EN/Y2015/V35/I6/519

Fig.1 IR spectra of PSSA doped PANI

Table 1 Solubility of doped PANI prepared at different molar ratios of An/—SO₃H

Table 2 Average conductivity of PSSA solution and PANI prepared in different synthesis conditions

Fig.2 Molecular structure of polyaniline

Fig.3 N1s XPS spectra of sample 2# (a) and sample 4# (b)

Table 3 Elements analysis of two PANI-PSSA samples(atomic fraction / %)

Table 4 N1s XPS spectra analysis of two PANI-PSSA samples

Fig.4 S2p XPS spectra of sample 2# (a) and sample 4# (b)

Fig.5 |Z | plots (a) and Nyquist plots (b) of 20# steel after immersion in 3.5%NaCl acid solution for 200 h

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