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Corrosion rate measurement using sacrificial probe

A corrosion rate and probe technology, which is applied in measuring devices, weather resistance/light resistance/corrosion resistance, instruments, etc., can solve problems such as difficult to measure local corrosion

Active Publication Date: 2019-08-30
ROSEMOUNT INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to their nature, many corrosion sensors require frequent maintenance and replacement
Further, it is difficult to measure a type of localized corrosion known as "pitting corrosion"

Method used

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  • Corrosion rate measurement using sacrificial probe
  • Corrosion rate measurement using sacrificial probe
  • Corrosion rate measurement using sacrificial probe

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Embodiment Construction

[0013] A corrosion rate measurement system is provided in which a sacrificial probe is configured to corrode at different rates over time when exposed to a corrosive fluid. For example, the probes may be configured to corrode initially at a relatively fast rate to provide higher sensitivity to corrosion measurements. However, after prolonged use, the probe may be configured to corrode at a different rate, for example at a slower rate. This allows the probe to continue to operate and provide limited functionality without requiring immediate replacement. Configurations may also be provided that increase the probe's susceptibility to specific types of corrosion, such as pitting type corrosion.

[0014] Various intrusive and non-intrusive methods are used to monitor corrosion including material loss, electrochemical measurements and analytical measurements. Various techniques include measuring resistance, eddy current, conductivity, ultrasound and acoustics. The most common tec...

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Abstract

The invention discloses a corrosion rate measurement system, and the corrosion rate measurement system includes a sacrificial probe configured to be exposed to a corrosive material. A sensor is arranged to detect physical changes in the sacrificial probe due to corrosion of the sacrificial probe from the corrosive material. Measurement circuitry is connected to the sensor and provides an output indicative of a corrosion rate of the sacrificial probe from exposure to the corrosive material. The sacrificial probe has a physical characteristic which causes the sacrificial probe to corrode at a non-linear rate.

Description

[0001] This application was submitted on December 17, 2014, and the application number is 201410788042.6. It is a divisional application of the patent application named "corrosion rate measurement using sacrificial probe". technical field [0002] This invention relates to the corrosion of components in various environments. More specifically, the invention relates to the measurement of corrosion rates under such environmental conditions. Background technique [0003] Corrosion is the gradual destruction of materials by chemical reactions or wear in the environment. Corrosion reduces the useful properties of materials and structures, including strength, appearance, and permeability to fluids. Many structural alloys only corrode when exposed to moisture in the air. This process can be accelerated by exposure to certain substances. Corrosion can be concentrated locally to form pits or fissures, or corrosion can extend across a broad area, corroding the surface uniformly. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N17/04
CPCG01N17/04G01N27/04G01N17/00
Inventor 罗伯特·C·海德克
Owner ROSEMOUNT INC
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