Effects of chitosan inhibitor on the electrochemical corrosion behavior of 2205 duplex stainless steel |
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| Authors: | Se-fei Yang Ying Wen Pan Yi Kui Xiao Chao-fang Dong |
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| Affiliation: | 1. Department of Stomatology, General Hospital of the People's Liberation Army, Beijing 100853, China;2. Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China;Journals Publishing Center, University of Science and Technology Beijing, Beijing 100083, China;3. Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China |
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| 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. |
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| Keywords: | inhibitor chitosan stainless steel corrosion behavior electrochemistry |
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