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Corrosion-Indicating Device

IP.com Disclosure Number: IPCOM000099921D
Original Publication Date: 1990-Mar-01
Included in the Prior Art Database: 2005-Mar-15
Document File: 1 page(s) / 46K

Publishing Venue

IBM

Related People

Murcko, RM: AUTHOR

Abstract

Disclosed is a device which utilizes die-drawn wire to electrically monitor the corrosivity of an environment. The resistance change of an uncoated wire, after compensation for temperature effects, provides the corrosivity indication.

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This is the abbreviated version, containing approximately 81% of the total text.

Corrosion-Indicating Device

       Disclosed is a device which utilizes die-drawn wire to
electrically monitor the corrosivity of an environment.  The
resistance change of an uncoated wire, after compensation for
temperature effects, provides the corrosivity indication.

      The Corrosion Indicating Device (CID) consists of a TEFLON*
spool 1 with small-diameter coated wires 2 and uncoated wires 3 wound
along a threaded region.  The wires are terminated and soldered to
contacts recessed at end 4 which facilitates plugging into a mating
connector.  The spool is designed so that the wires are supported
within the threads of the four ribs 5.  Wire winding is accomplished
with the addition of four stainless steel pins inserted into holes
located between and at the same radius as the four TEFLON ribs.  Once
the wires are terminated, these pins are removed so that the wires
are maintained in a stress-free state.  The threads hold the two wire
types in close proximity to each other.  This is essential because
the temperature-induced resistance changes of the coated wire are
used to normalize (*) the data obtained from the uncoated wire.  Once
accomplished, the normalized resistance of the uncoated wire gives a
direct indication of the corrosivity of the environment.

      The advantages of using wire for this purpose is that die
drawing creates a consistent metal structure with a repeatable
response to corrosion.  Also, different metallurgies may be used
wh...