CORROSION PERFORMANCE OF STEEL REINFORCEMENT IN SIMULATED PORE SOLUTIONS IN THE PRESENCE OF IMIDAZOLINE QUATERNARY AMMONIUM SALT CORROSION INHIBITOR

Author(s): Fei-long Fei, Qi-jun Yu,Jiang-xiong Wei and Jie Hu
Paper category: Proceedings
Book title: Proceedings of CONSEC13 Seventh International Conference on Concrete under Severe Conditions - Environment and Loading Volume I
Editor(s): Z.J. Li, W. Sun, C.W. Miao, K.Sakai, O.E. Gjørv, N.Banthia
ISBN: 978-2-35158-124-7
e-ISBN: 978-2-35158-134-6
Publisher: RILEM Publications SARL
Publication year: 2013
Pages: 678-689
Total Pages: 961
Language : English

Abstract: Based on molecular design, a tailored cationic type of imidazoline quaternaryammoniumsalt (IQS) corrosion inhibitor used for reinforced concrete was synthesized. Further, its inhibition effect on the corrosion of steel reinforcement in the simulated concrete pore solution containing3.5wt. % NaCl was characterized by electrochemical measurements (potentio-dynamic polarization and electrochemical impedance spectroscopy) and surface analysis (scanning electronic microscopy and X-ray diffraction). The electrochemical results indicated thatin the presence of 1% IQS, although the inhibition efficiency of carbon steel was slightly lower compared to that in the presence of 2% sodium nitrite (normally used inorganic corrosion inhibitors), it was higher than that in the presence of 2% alcohol-amine organic corrosion inhibitors. The surface analysis showed that after 28 days of immersion, no corrosion products were found on the surface of steel electrode in the presence of 1% IQS, like that in presence of 2% sodium nitrite, while abundant corrosion products were visible in the reference specimen and in the specimen in the presence of 2% alcohol-amine.

Online publication : 2013
Publication type : full_text
Public price (Euros) : 0.00