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Purpose and Advantages of Cyclic Corrosion Salt Spray Test Chamber
Category: Industry News
Cyclic corrosion salt spray test chambers can provide a laboratory simulation of natural corrosion environments. Before cyclic corrosion testing, as a standard method for laboratory simulation corrosion testing, continuous salt spray corrosion testing is generally carried out under 35°C conditions. Because conventional salt spray corrosion testing methods cannot simulate the dry/wet environmental conditions of outdoor natural environments, recent research shows that cyclic corrosion test results are very close to outdoor natural corrosion in terms of corrosion structure, surface morphology, and relative corrosion rate. Their test results are usually poorly correlated with actual outdoor results. So, let's learn about the uses and advantages of cyclic corrosion salt spray test chambers!
Cyclic corrosion salt spray test chambers expose specimens to a series of different environments in repeated cycles. Simple tests consist of cycles composed of two conditions: a spray cycle and a drying cycle. More complex test procedures, especially salt spray tests for automobiles, require multi-stage cycles, including humidity, salt spray or saltwater shower functions, and drying. These test conditions were originally achieved in the laboratory through rigorous manual operation. Automotive cyclic corrosion salt spray test chambers, such as GMW 14872, are linked to humidity control, which is difficult to achieve under many laboratory conditions. Many automotive corrosion test methods typically require samples to be repeatedly exposed to cyclic test conditions such as salt spray, high humidity, low humidity drying, and room temperature. These test methods sometimes require shower/rain conditions with higher flow rates than typical salt spray. Typically, the temperature and humidity transition time must also be strictly controlled.
Cyclic corrosion salt spray test chambers can realistically simulate natural environments such as temperature, humidity, drying, freezing, and external air introduction. Refrigeration uses a separate design for the refrigeration system and the spray system, including an anti-corrosion refrigeration unit and a touch-type control system.
There are generally three methods for cyclic corrosion salt spray test chambers.
Salt spray (17 h) forced drying (3 h) salt water immersion (2 h) natural drying (2 h) in a cycle of salt spray.
Salt spray (1 h) humidification (16 h) forced drying (4.5 h) salt water immersion (1 h) natural drying (1.5 h) salt spray cycle.
Salt spray (4 h) forced drying (5 h) humidification (12 h) forced drying (2 h) natural drying (1 h) salt spray cycle.
During the spray cycle, the conventional operation in a cyclic corrosion salt spray test chamber is as follows:
The corrosive solution in the built-in tank is delivered to the nozzle.
The compressed air becomes humid on its way from the bubbling tower to the nozzle.
The nozzle atomizes the corrosive solution into a corrosive vapor mist.
The chamber heater maintains the set chamber temperature.
The above is an introduction to the uses and advantages of cyclic corrosion salt spray test chambers. If you need to know more, please feel free to contact us!
Related Information
Research, design and production of environmental testing machines
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