A salt spray testing device and method for metal parts

By using a combination of water-absorbing components and pressure sensors in the salt spray test apparatus, the problems of accuracy and downtime in liquid film thickness measurement under high humidity and high salt conditions were solved, achieving high-precision liquid film thickness detection without shutdown and at low cost.

CN121540618BActive Publication Date: 2026-07-24YOUXIN INTELLIGENT EQUIP TECH (XUZHOU) CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
YOUXIN INTELLIGENT EQUIP TECH (XUZHOU) CO LTD
Filing Date
2025-12-17
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

In salt spray tests, existing technologies struggle to accurately measure liquid film thickness in high humidity and high salt environments. Optical and electrical conductivity probe methods are affected by fog and condensation, resulting in low detection accuracy and making it impossible to perform tests without shutting down the system.

Method used

A salt spray test device with a liquid film thickness detection mechanism is used to measure the liquid film thickness without stopping the machine by using a water absorption component and a pressure sensor. Water is absorbed by capillary action and the weight change is detected. Combined with a sliding component and a sensor, the liquid film thickness measurement is achieved with micron-level accuracy.

Benefits of technology

It enables liquid film thickness measurement in high-salt and high-humidity environments without interruption by condensation and fog, reducing detection costs and maintenance expenses while improving measurement accuracy and speed.

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  • Figure CN121540618B_ABST
    Figure CN121540618B_ABST
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Abstract

The application relates to the technical field of salt spray testing, in particular to a salt spray testing device and method for metal parts, which comprises a salt spray test box with a box door, the top end of the salt spray test box is fixedly connected with a liquid film thickness detection mechanism, and the inside of the salt spray test box is fixedly connected with a sprayer; when the liquid film on the upper surface of the metal part in the salt spray test box is not at a high-efficiency corrosion thickness, the spraying power of the sprayer is adjusted, and the liquid film thickness is adjusted to the high-efficiency corrosion thickness; the application can provide a relatively stable liquid film measurement mode in a high-salt and high-humidity environment without shutdown, the liquid film measurement mode can be not affected by condensation and fog, when a water absorption part touches the liquid film downwards, water is rapidly absorbed under the action of capillary phenomenon, a pressure sensor can detect that the weight of a down rod rapidly changes for the first time, the capillary phenomenon occurs between solid and liquid phases, so that the detection interference of condensation and fog is avoided, and non-stop detection in the salt spray test process is realized.
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Citation Information

Patent Citations

  • CN104713614A

  • CN107145693A