Source: Journal of engineering materials and technology
Detection and Monitoring of Corrosion in Structural Carbon Steels
Using Electromagnetic Sensors
F. Rumiche
e-mail: frumic1@[EMAIL PROTECTED]
E. Indacochea
e-mail: jeindaco@[EMAIL PROTECTED]
L. Wang
e-mail: mlwang@[EMAIL PROTECTED]
of Civil and Materials Engineering, University of Illinois
at Chicago, 842 West Taylor Street, Chicago, IL 60607
Received: 22 January 2007; revised: 25 March 2008; published: 10 June
2008
An electromagnetic sensor was *****sed as a possible instrument for
nondestructive detection and monitoring of corrosion in structural
carbon steels. In this study, the magnetic response of three
structural carbon steel rods (AISI 1018, AISI 1045, and AISI 1045-High
Mn), was evaluated in the as-received (uncorroded) and corroded
conditions. Initially, the material was systematically machined out
from each steel rod, followed by the magnetic evaluation of each
specimen. Other set of metal rods were exposed to uniform corrosion
and later examined by the electromagnetic sensor. Correlations have
been established between the degree of mass loss and magnetic response
of the test specimen. Based on the results, it can be said that the
electromagnetic sensor has the potential to be used as a reliable
nondestructive tool to detect corrosion at early stages based on the
variation in magnetic properties. A metallurgical analysis of all test
rods was also undertaken, which showed that microstructures have an
im****tant effect of the magnetic properties of the steels.
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