Microemulsion Penetrant Testing Media for Fissure Detection
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Solution Overview
Problem
Conventional penetrant testing media have limitations such as low dye content, reduced detectability, environmental unfriendliness, and difficulties in removing excess penetrant from surfaces, leading to inadequate defect detection and environmental concerns.
Innovation Solution
Development of microemulsion-based penetrant testing media with a higher water content, reduced solubilizers, and increased dye concentration, utilizing water-insoluble solvents and surfactants to enhance detectability and environmental sustainability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional penetrant testing media use water-soluble dyes and surfactants to improve environmental friendliness, then environmental compatibility improves, but detectability and defect detection capability deteriorate due to low dye content
Solution Approach 1:
The patent changes the chemical parameters by using water-insoluble dyes instead of water-soluble dyes, and formulating microemulsion compositions with specific ratios of water, surfactants, and solvents. This allows achieving both environmental compatibility and high detectability by optimizing the microemulsion structure rather than simply increasing dye concentration.
Solution Approach 2:
The patent creates a composite microemulsion system combining water, surfactants, water-insoluble dyes, and optional solvents in specific proportions. This composite structure enables the dye to be effectively delivered and retained in defect openings while maintaining environmental friendliness through biodegradable surfactant selection.
2Measurement precision
If conventional penetrant testing media increase dye content to improve detectability, then defect detection capability improves, but environmental friendliness deteriorates due to higher organic solvent and surfactant content
Solution Approach 1:
The patent employs biodegradable surfactants that break down naturally, replacing persistent organic compounds. This allows using sufficient dye and surfactant content for high detectability while the environmental impact is minimized through natural degradation of the surfactant components after use.
3Ease of manufacture
If conventional penetrant testing media use water-based formulations to improve environmental compatibility, then ease of disposal improves, but dye solubility and stability deteriorate requiring excessive solubilizers
Solution Approach 1:
The patent uses surfactants as intermediary substances that bridge the incompatibility between water and water-insoluble dyes. The surfactant molecules have hydrophilic heads that interact with water and hydrophobic tails that interact with the dye, enabling solubilization without requiring excessive amounts of solubilizers while maintaining water-based environmentally friendly formulation.
4Measurement precision
If conventional penetrant testing media remain on surfaces after application to ensure defect detection, then detectability improves, but removal difficulty increases leading to false readings
Solution Approach 1:
The patent creates local concentration differences through the microemulsion structure, where dye is concentrated in defect openings due to capillary forces and surfactant-dye interactions, while the bulk formulation remains easily removable. This spatial differentiation of dye distribution enables both high detectability and easy removal.
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
The microemulsion-based penetrant testing media achieve higher detectability and environmental friendliness by allowing greater water content and reduced solubilizer use, improving defect detection and simplifying disposal processes.
Implementation Method 1
They are microemulsions, in contrast to the penetrant testing media of the prior art
Implementation Method 2
at least one surfactant D), selected from among anionic surfactants a), nonionic surfactants b), and/or amphoteric surfactants c)
Data Source
AI summary
The invention relates to fissure-detection agents for fault detection according to the penetration method of metallic and/or non-metallic components, which are a microemulsion comprising at least 10 wt. % of water A), at least 0.1 wt. % of at least one dye B), at least 5 wt. % of at least one substantially water-insoluble liquid phase C) and at least 2 wt. % of at least one surfactant D) selected from non-ionic, anionic and/or amphoteric surfactants, the sum of all constituents being 100 wt. %, wherein the fissure-detection agent has a mean particle size in the range of 1 to 250 nm and a transparency of at least 70% at 600 nm. The invention also relates to the production of said fissure-detection agents, to a process for their preparation or/and disposal, and their use.