Integrated ER LPR Corrosion Probe Design
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Solution Overview
Problem
Current corrosion and erosion monitoring techniques in industrial settings, particularly in high-pressure and high-temperature environments, require multiple separate electrode probes spaced along objects, leading to limitations in accessibility, increased complexity, and potential weakening of structures due to access fittings, as well as inefficiencies in data collection and analysis.
Innovation Solution
A compact probe device integrating shared electrodes for both Electrical Resistance (ER) and Linear Polarization Resistance (LPR) techniques, allowing for simultaneous measurement of uniform and localized corrosion, with electrodes closely spaced to minimize physical variations and reduce the number of access fittings and connector pins, enabling real-time monitoring of corrosion and erosion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple separate electrode probes are used for different measuring techniques, then comprehensive corrosion data can be obtained, but device complexity and number of access fittings increase
Solution Approach 1:
The patent combines multiple electrode assemblies (ER technique electrode and LPR technique electrodes) into a single integrated probe device. This merging allows comprehensive corrosion monitoring through multiple techniques while reducing the number of separate probes and access fittings required, directly resolving the technical contradiction between versatility and device complexity
Solution Approach 2:
The integrated probe device performs multiple corrosion measurement functions (Electrical Resistance and Linear Polarization Resistance techniques) simultaneously through a single device. This multi-functionality enables comprehensive corrosion data collection while minimizing the number of access fittings needed, addressing both versatility and complexity concerns
2Adaptability or versatility
If multiple separate electrode probes are spaced along the object, then comprehensive corrosion monitoring is achieved, but accessibility and structural integrity are compromised
Solution Approach 1:
By merging multiple electrode assemblies into one integrated probe, the patent reduces the number of access fittings required from multiple to just one. This single access point improves accessibility and maintains structural integrity while still providing comprehensive corrosion monitoring coverage through the multiple electrode techniques integrated within the single probe
3Measurement precision
If electrodes are closely spaced in a single probe, then physical variations are minimized, but electrode isolation and signal interference become concerns
Solution Approach 1:
The patent applies local quality by providing individual insulation for each electrode assembly while maintaining close spacing. Each electrode is electrically isolated through its own insulator, preventing signal interference, while the close spacing of multiple electrode assemblies within the single probe ensures consistent measurements across different corrosion techniques, resolving the contradiction between measurement precision and signal interference
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This integrated approach allows for more accurate and efficient online monitoring of corrosion and erosion, reducing the need for multiple probes and fittings, while maintaining measurement precision and enabling the detection of various corrosion types, including pitting and stress corrosion cracking, within a single probe device.
Implementation Method 1
electrodes are applied which are directly immersed into the corroding or eroding fluid within the object of interest... electrochemical technique (further also commonly named LPR (linear polarization resistance) technique)... A potential difference is applied between the working electrode (WE) and the reference electrode (RE)
Implementation Method 2
The ER technique applies ER probes which measure metal loss very accurately at sensitivity of at least 0.1 micrometre and even up to 0,01 micrometre. With electrical resistance (ER) measuring the electrical resistance of the corroding electrode is compared to an identical electrode that is not corroding
Data Source
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AI summary
Probe device carrying measuring electrodes of at least two of the group of ER, LPR and CC measurement technique, such as an ER type electrode and an LPR type electrode, which electrodes preferably are of the same material or alloy and are designed to be exposed to a fluid of interest. As an example the probe device carries an ER type electrode and one or two LPR type electrodes, which ER type electrode is connected to at least three or four leads to output measurement signals of at least two distinct natures to a connected monitoring system and which LPR type electrodes are each connected to a single lead, one for each LPR type electrode to output measurement signals of one distinct nature to a connected monitoring system.