SYMPOSIA PAPER Published: 01 January 1987
STP25864S

A New Method to Monitor In-Situ Protective Properties of Rust on Weathering Steel

Source

To evaluate how protective rust is, and to understand the role rust plays, electrochemical impedance of the rust films on low alloy steels, particularly weathering steels, was studied in a sodium sulfate (Na2SO4) solution. By the analysis of the harmonic current, the impedance in the frequency range of 1 Hz to 1.0 kHz is considered to be due to the ion transfer resistance through the rust film, which is dominant factor for the protective properties of the rust films. Based on this principle, a compact instrument was developed to monitor the protective properties of the rust films formed on weathering steels of field structures.

Author Information

Ito, S
R&D Laboratories-I, Nippon Steel Corporation, Kawasaki, Japan
Kihira, H
R&D Laboratories-I, Nippon Steel Corporation, Kawasaki, Japan
Murata, T
R&D Laboratories-I, Nippon Steel Corporation, Kawasaki, Japan
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Details
Developed by Committee: G01
Pages: 366–373
DOI: 10.1520/STP25864S
ISBN-EB: 978-0-8031-5023-2
ISBN-13: 978-0-8031-0966-7