Electronic and electrical insulation cleaning agents play a critical role in electrical equipment maintenance. The impact of their residue on the equipment's dielectric strength requires a comprehensive analysis of chemical composition, physical properties, and environmental factors. Dielectric strength, as a core indicator of the insulation material's ability to withstand voltage, is directly related to the safety and stability of equipment operation. The nature, concentration, and environment of cleaning agent residues can significantly impact this.
In terms of chemical composition, qualified electronic and electrical insulation cleaning agents typically utilize a combination of high-purity organic solvents and surfactants. These components undergo compatibility testing during the design phase to ensure they are non-reactive with metals like copper and aluminum, as well as insulating materials like ceramics and polyvinyl chloride. For example, non-polar solvents effectively dissolve oil stains, while polar solvents target water-soluble residues. This synergistic effect prevents the formation of conductive ions or corrosive substances in the residue. However, using inferior cleaning agents, which may contain strong acids, bases, or halogens (such as chlorine and bromide ions), can cause residues to combine with moisture in high humidity environments to form an electrolyte, which can corrode pads and circuits, degrading the equipment's external insulation.
In terms of physical properties, the volatility and residual form of electronic and electrical insulation cleaning agents are key factors affecting dielectric strength. High-quality cleaning agents evaporate quickly after cleaning, forming a uniform insulating film. This not only does not reduce dielectric strength, but may actually improve the device's external insulation performance by removing surface contaminants. However, if the cleaning agent does not evaporate completely, residual organic matter may attract dust and form conductive pathways, which can increase leakage current or signal interference, especially in delicate circuits. Furthermore, the form of the residue (e.g., liquid or solid) also affects its conductivity. Liquid residue, due to its high fluidity, is more likely to form short circuits, while solid residue, due to localized concentration, can cause electric field distortion.
The impact of environmental factors on electronic and electrical insulation cleaning agent residue is also not negligible. In high humidity environments, ionic species (e.g., chloride ions) in the residue accelerate migration, forming conductive pathways. Under high temperatures, the residue may decompose or carbonize, damaging the device's surface protective layer and reducing its resistance to vibration and temperature shock. For example, in high-precision applications such as aerospace and medical equipment, long-term exposure of residue to extreme environments can significantly increase equipment failure rates due to a decrease in dielectric strength.
In practical applications, residue management in electronic and electrical insulation cleaning agents requires a comprehensive approach to cleaning process and equipment characteristics. Suitable cleaning agents must be selected for different contaminants (e.g., polar, water-soluble, non-polar, water-soluble, or non-polar, non-water-soluble). Residue can be reduced by controlling parameters such as spray pressure and cleaning time. Furthermore, sufficient drying time should be ensured after cleaning to prevent residual liquid from impacting equipment operation. For complex processes, combined cleaning agents can be designed to remove different impurities in stages to reduce residue concentration.
From a long-term reliability perspective, the potential risk of residue from electronic and electrical insulation cleaning agents stems from the synergistic effects of their chemical properties and the environment. Even if the residue initially meets insulation performance standards, subsequent degradation due to environmental changes (such as humidity and temperature fluctuations) can still cause a decrease in dielectric strength. Therefore, a regular inspection mechanism is necessary to monitor residue status through methods such as surface resistivity testing and infrared thermal imaging to ensure long-term stable equipment operation.
Residue from electronic and electrical insulation cleaning agents has a dual impact on the dielectric strength of equipment: Qualified products, through scientific formulation and process control, can improve insulation performance, while inferior products or improper use can lead to a decrease in dielectric strength. In practical applications, comprehensive measures are required, including cleaning agent selection, process optimization, environmental control, and long-term monitoring, to ensure the safety and reliability of electrical equipment.
