IN-SITU STM STUDY ON DYNAMIC BEHAVIOR OF CORROSIONAND INHIBITION OF REBAR STEEL IN DIFFERENTSIMULATED CONCRETE PORE SOLUTION

J Chin Soc Corr Pro

2003, Vol. 23

Issue (6): 321-325 DOI:

Research Report

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IN-SITU STM STUDY ON DYNAMIC BEHAVIOR OF CORROSIONAND INHIBITION OF REBAR STEEL IN DIFFERENTSIMULATED CONCRETE PORE SOLUTION

Ronggang Hu;Ronggui Du;Minhua Shao

厦门大学化学化工学院固体表面物理化学国家重点实验室

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Abstract In this paper,in situ scanning tunneling microscopy (STM)was employed to investigate morphological changes on the surface of reinfo rcing steel immersed in simulated concrete pore solutions(saturated calcium hyd roxide).The effect of chloride,pH value and LD-2 compound inhibitor on surface m orphology were studied.The sequence of images recorded in different solutions tr acked the process of formation and breakdown of passive film on steel surface.Th e result with spatial resolution in the order of nanometer obtained from STM exp eriment is able to provide additional information beyond electrochemical paramet ers and beneficial to better understanding of the mechanism of growth and breaki ng down of passive film on the surface of reinforcing steel.

Key words: STM reinforcing steel simulated concrete pore soluti on passive film inhibitor

Received: 03 June 2002

ZTFLH:

TG174.22

Corresponding Authors: Ronggang Hu

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Ronggang Hu; Ronggui Du; Minhua Shao. IN-SITU STM STUDY ON DYNAMIC BEHAVIOR OF CORROSIONAND INHIBITION OF REBAR STEEL IN DIFFERENTSIMULATED CONCRETE PORE SOLUTION. J Chin Soc Corr Pro, 2003, 23(6): 321-325 .

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2003/V23/I6/321

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