Effects of chitosan inhibitor on the electrochemical corrosion behavior of 2205 duplex stainless steel

Se-fei Yang; Ying Wen; Pan Yi; Kui Xiao; Chao-fang Dong

doi:10.1007/s12613-017-1518-y

Volume 24 Issue 11

Nov. 2017

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2017 > 24(11): 1260-1266

Se-fei Yang, Ying Wen, Pan Yi, Kui Xiao, and Chao-fang Dong, Effects of chitosan inhibitor on the electrochemical corrosion behavior of 2205 duplex stainless steel, Int. J. Miner. Metall. Mater., 24(2017), No. 11, pp. 1260-1266. https://doi.org/10.1007/s12613-017-1518-y

Cite this article as:

Se-fei Yang, Ying Wen, Pan Yi, Kui Xiao, and Chao-fang Dong, Effects of chitosan inhibitor on the electrochemical corrosion behavior of 2205 duplex stainless steel, Int. J. Miner. Metall. Mater., 24(2017), No. 11, pp. 1260-1266. https://doi.org/10.1007/s12613-017-1518-y

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Research ArticleOpen Access

Effects of chitosan inhibitor on the electrochemical corrosion behavior of 2205 duplex stainless steel

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Corresponding author:
Ying Wen E-mail: wenying@ustb.edu.cn
Received: 19 June 2017; Revised: 11 August 2017; Accepted: 28 August 2017

Abstract

Abstract

The effects of chitosan inhibitor on the corrosion behavior of 2205 duplex stainless steel were studied by electrochemical measurements, immersion tests, and stereology microscopy. The influences of immersion time, temperature, and chitosan concentration on the corrosion inhibition performance of chitosan were investigated. The optimum parameters of water-soluble chitosan on the corrosion inhibition performance of 2205 duplex stainless steel were also determined. The water-soluble chitosan showed excellent corrosion inhibition performance on the 2205 duplex stainless steel. Polarization curves demonstrated that chitosan acted as a mixed-type inhibitor. When the stainless steel specimen was immersed in the 0.2 g/L chitosan solution for 4 h, a dense and uniform adsorption film covered the sample surface and the inhibition efficiency (IE) reached its maximum value. Moreover, temperature was found to strongly influence the corrosion inhibition of chitosan; the inhibition efficiency gradually decreased with increasing temperature. The 2205 duplex stainless steel specimen immersed in 0.4 g/L water-soluble chitosan at 30℃ displayed the best corrosion inhibition among the investigated specimens. Moreover, chitosan decreased the corrosion rate of the 2205 duplex stainless steel in an FeCl₃ solution.
- inhibitor;
- chitosan;
- stainless steel;
- corrosion behavior;
- electrochemistry

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