Corrosion measurement system
First Claim
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1. A corrosion measurement system for use in a particular corrosive medium to obtain measurements for determining a rate of corrosivity of the medium, comprising:
- a probe having a reference element and a corroding element, each element having identical physical properties, the probe adapted for contacting the corrosive medium, the reference element having a conformal coating that protects the reference element from exposure to corrosivity of the medium, and the corroding element fully exposed for corrosion by the medium;
a measuring circuitry with a power source associated with the elements of the probe for measuring a rate of corrosivity; and
,means for instantaneously displaying the rate of corrosivity of the medium, said means in communication with the probe.
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Abstract
An improved corrosion measurement system for determining the rate of corrosion of a fluid medium. The system is comprised of a highly sensitive excitation and amplification electronic circuitry for registering and displaying the stable and accurate measurement results. A unique unitized measurement probe is temperature stabilized using thermally inertially balanced metallic probes; the first reference element being coated with an impermeable insulating coating, the second, the corroding element, being fully exposed to the corrosive fluid medium.
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Citations
28 Claims
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1. A corrosion measurement system for use in a particular corrosive medium to obtain measurements for determining a rate of corrosivity of the medium, comprising:
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a probe having a reference element and a corroding element, each element having identical physical properties, the probe adapted for contacting the corrosive medium, the reference element having a conformal coating that protects the reference element from exposure to corrosivity of the medium, and the corroding element fully exposed for corrosion by the medium; a measuring circuitry with a power source associated with the elements of the probe for measuring a rate of corrosivity; and
,means for instantaneously displaying the rate of corrosivity of the medium, said means in communication with the probe. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A probe for use in a corrosion measurement system operative on a particular corrosive medium to obtain measurements for determining a rate of corrosivity of the medium, the probe comprising:
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a probe body with a distal end, a reference element and a corroding element, each element having a terminal end; a probe circuitry with a power source to register a resistivity of the reference element and resistivity changes of the corroding element; and
,measuring circuitry associated with the probe elements of the probe body for measuring the rate of corrosivity; and
,a means for compensating for thermal and current variations for precision in measuring the rate of corrosivity. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A probe for use in a corrosion measurement system operative on a particular corrosive medium to obtain measurements for determining a rate of corrosivity of the medium, the probe comprising:
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a probe body with a distal end, a reference element and a corroding element, each element constructed of the same metallic material, having an identical mass and shape, and each having a terminal end;
the reference element further comprising an outer surface having a coating of a material that is impermeable to the corrosive medium for protecting the reference element from the corrosive medium;a probe circuitry with a power source to measure a resistivity of the reference element and resistivity changes of the corroding element; and
,measuring circuitry associated with the probe elements of the probe bodyfor measuring a rate of corrosivity measurement results. - View Dependent Claims (17, 18, 19, 20, 21)
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22. A corrosion measurement system for use with a particular corrosive medium to obtain measurements for a rate of corrosivity of the medium, comprising:
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a probe having a covered reference element and an exposed corroding element; a measuring circuitry associated with the elements of the probe for measuring rate of corrosivity, the circuitry having a zero frequency constant current DC source from one to five amperes; and
,means for displaying the rate of corrosivity of the medium in communication with the probe.
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23. A system to determine the corrosivity of a fluid medium by the changes in a corroding mass of a metallic material respective to a reference mass, while both masses are in contact with the fluid medium, the system comprising:
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a probe having a reference element and a corroding element, each element comprising the same material and having the same shape and mass, contacting the fluid medium; means for protecting the reference element from corrosion by the fluid medium surrounding the reference element; means for supplying the system with an electrical current, for providing an essentially constant reference resistance and a fluctuating corrosion resistance that increases as the mass of the corroding element is diminished by corrosivity; means for ratiometric measurements of the reference and corrosion resistances associated with the probe, that essentially eliminates influences external to the system; means for real-time determination of the rate of corrosivity of the fluid medium by measuring and comparing resistance changes of the elements, that are primarily caused by loss of mass of the corroding element; and
,means for displaying the rate of corrosivity of the medium in communication with the probe.
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24. A corrosion measurement system for use in a particular corrosive medium to obtain measurements for determining a rate of corrosivity of the medium, comprising:
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a probe having a reference element and a corroding element, each element having identical physical properties and each element adapted for contacting the corrosive medium; a measuring circuitry with a power source associated with the elements of the probe for measuring a rate of corrosivity;
the measuring circuitry power source further comprising a Wein bridge oscillator that oscillates within a frequency range from 700 to 900 Hertz, the oscillator communicating with the probe for providing an excitation voltage that essentially generates a low distortion sinusoidal waveform through the probe to the measuring circuitry, and a step down transformer with a primary winding and a secondary winding, the primary winding driven by the low distortion sinusoidal waveform from the oscillator.means for displaying the rate of corrosivity of the medium in communication with the probe. - View Dependent Claims (25, 26, 27, 28)
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Specification