Corrosion Test Device Force Measurement
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Solution Overview
Problem
Existing corrosion test devices for steel materials, such as those used for sulfide stress corrosion cracking, suffer from inaccuracies in test load determination due to measurement errors in ring deformation and temperature fluctuations, leading to unreliable results.
Innovation Solution
The integration of a force measuring device, such as a piezo load cell, directly in the path of the clamping element's force application allows for precise measurement of the test load on the sample, ensuring accurate force transmission and minimizing friction and displacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If ring deformation is measured indirectly using micrometer screws to determine test load, then the device structure remains simple, but measurement precision and test load determination accuracy deteriorate
Solution Approach 1:
The patent replaces the mechanical measurement system (micrometer screws measuring ring deformation) with a force meter (such as piezoelectric sensor) that directly measures the test load force. This substitution eliminates the indirect measurement chain and its associated errors from temperature fluctuations and material inhomogeneities, directly improving measurement precision while maintaining reasonable device complexity.
Solution Approach 2:
The force meter acts as an intermediary device installed in the force transmission path between the clamping element and the sample. It directly measures the force without requiring measurement of ring deformation, thereby eliminating the errors introduced by temperature fluctuations and material inhomogeneities of the test ring while keeping the overall device structure relatively simple.
2Measurement precision
If force measuring device is installed in the clamping element path, then test load measurement precision improves, but device complexity increases
Solution Approach 1:
The force meter is merged into the existing clamping element structure by installing it directly in the force transmission path. This integration approach allows the force measurement function to be combined with the existing clamping mechanism, improving force measurement accuracy while minimizing the increase in overall device complexity.
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 approach enables more precise and reliable test results by directly measuring the force applied to the sample during deformation, significantly improving the accuracy and significance of the test outcomes while maintaining compliance with established standards like NACE TM0177-2005.
Implementation Method 1
a force measuring device 9, located in the flow direction of the applied tensile force of the clamping element 5 between the spherical bearing 6 and a ball bearing 7, advantageously consisting of a piezo load cell
Data Source
AI summary
The invention relates to a device for carrying out corrosion tests on steel materials, for example for testing for sulfide stress corrosion cracking according to NACE standard TM0177-2005, consisting of a test ring (1) into which a sample (3) immersed in a test solution is subjected to a tensile force via a clamping element (5), and the sample (3) is connectable at one end to the test ring (1) and at the other end to the clamping element (5), and the clamping element (5) is provided with a bearing on the surface of the test ring for force transmission into the sample (3), and a device for determining the tensile force applied to the sample. According to the invention, a force measuring device (9) is arranged in the direction of flow of the applied tensile force of the clamping element, directly measuring the acting force.