CORROSION INHIBITION PERFORMANCE OF CHITOSAN AND PHOSPHONIC CHITOSAN FOR MILD STEEL IN SEAWATER

J Chin Soc Corr Pro

2010, Vol. 30

Issue (3): 192-196 DOI:

Research Articles

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CORROSION INHIBITION PERFORMANCE OF CHITOSAN AND PHOSPHONIC CHITOSAN FOR MILD STEEL IN SEAWATER

WU Maotao¹, LI Yantao², LI Zaifeng¹, Hou Baorong²

1. College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042
2. Institute of Oceanology, Chinese Academy of Sciences,Qingdao 266071

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Abstract

Water soluble chitosan was modified by phosphonation. The inhibitive properties of chitosan and phosphonic chitosan for Q235 mild steel in seawater were studied by mass loss method and electrochemical measurement, and the inhibitive mechanism was analyzed. The results showed that chitosan had corrosion inhibitive effect for mild steel, and with the increasing of dosage of chitosan the inhibition efficiency was increased. The inhibition efficiency of phosphonic chitosan reached to 88.71 % when the concentration was 300 mg/L, and it had good inhibition effect at high temperature and inhibition efficiency kept high for long period of time. Polarization curves indicated that phosphonic chitosan is a cathodic corrosion inhibitor.

Key words: water soluble chitosan mild steel inhibition inhibition efficiency polarization

Received: 04 January 2009

ZTFLH:

TG 174.42

Corresponding Authors: LI Zaifeng E-mail: lizfengphd@126.com

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WU Maotao, LI Yantao, LI Zaifeng, Hou Baorong. CORROSION INHIBITION PERFORMANCE OF CHITOSAN AND PHOSPHONIC CHITOSAN FOR MILD STEEL IN SEAWATER. J Chin Soc Corr Pro, 2010, 30(3): 192-196.

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2010/V30/I3/192

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