NDE applications of SQUID magnetometry to electrochemical systems

Author

Misra, Mira ; Lordi, Scott ; Macvica, M. L A

Author_Institution

Mit Specialty Mater. Lab., Cambridge, MA, USA

Volume

27

Issue

2

fYear

1991

fDate

3/1/1991 12:00:00 AM

Firstpage

3245

Lastpage

3248

Abstract

A technique utilizing state-of-the-art SQUID magnetometers for noninvasive evaluation of the electrochemical reactivity of materials has been extended to practical systems. For example, sensitization of type-304 stainless steel has been identified. Magnetic signals produced by sensitized and unsensitized samples in acid demonstrate clear differences between the two types of samples. As a second example, electrodeposition of zinc, simulating recharging of Zn/Ni and Zn/Ag batteries, has been noninvasively monitored via magnetic signals. Disturbances in the current distribution over time, caused by nonuniform deposition, have been detected and compared to simulations of dendritic growth. Further investigations will be enhanced by increased flexibility, sensitivity, and spatial resolution available in a prototype SQUID instrument being developed

Keywords

SQUIDs; magnetometers; nondestructive testing; NDE applications; SQUID magnetometers; SQUID magnetometry; Zn electrodeposition; current distribution; dendritic growth; electrochemical reactivity of materials; electrochemical systems; magnetic signals; noninvasive evaluation; nonuniform deposition; practical systems; sensitivity; sensitization; spatial resolution; type-304 stainless steel; Batteries; Current distribution; Instruments; Magnetic materials; Monitoring; Prototypes; SQUID magnetometers; Spatial resolution; Steel; Zinc;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.133903

Filename

133903