How does the Salt Spray Chamber work?

Salt spray chambers come with double wall construction that provide proper air circulation between the walls. This air circulation is generated using blowers or heaters that are fitted in the base of the chamber. The testing machine is also equipped with a thermostat which is located within the testing area of the test chamber to maintain the chamber at 95 degree Fahrenheit.

The salty atmosphere inside the chamber is generated using an atom nozzle, which utilizes compressed air to create salt solution from the reservoir. The compressed air is first heated up to a certain level and then released out inside the chamber in the form of bubbles via the water stored in the saturation tower. The heater located inside the tower is controlled by a thermostat to maintain a temperature of 45.5 degrees celsius.

How to prepare the salt solution?

The salt solution is prepared keeping in mind the test requirements that the manufacturer is trying to meet. The ratio of preparing the salt mixture depends on the need of the application. Many standards require 20% salt solution, which means one ounce or 2 pounds of sodium chloride in one gallon demineralized / distilled water.

The thermostat fitted inside the chamber helps to control the temperature simultaneously keeping it at 95 degrees Fahrenheit plus or minus two degrees (35 degrees Celsius). This thermostat is generally settled at factory settings and does not require any adjustment. If you want to change the temperature of the thermostat you can modify the adjustment bolt. Rotating the screw clockwise will decreases the temperature whereas the anticlockwise rotation increases the temperature. Make sure to adjust the time/test duration before you increase the temperature and make any additional adjustments.
After discussing in detail about the construction of the corrosion test chamber and preparation of the salt solution, let’s now discuss the process of operating the salt spray chamber.

Before you begin any test using salt spray chamber, you should keep in mind the following things:

• Always make sure that the Salt Spray Fog Test Corrosion Chambers are positioned on a level surface.
• Check that the water reservoir is filled.
• Check if the salt reservoir is filled completely with one inch space form the top and place the cover
• Set the temperature at 95 degrees Fahrenheit or less when filling the reservoir.
• Securely close the canopy of the chamber. This canopy has a water seal that prevents salt fog from entering the test room.
• Periodically fill the distilled or demineralized water.
• Check the compressed air supply connection.
• Double-check the air supply and check the pressure of the air.
• Open the chamber air valve.
• Turn the compressed air supply on.
• Once the chamber temperature is stabilized, check the chamber temperature again.
• Observe the temperature thoroughly of all the heated areas to ensure that the maximum temperature mentioned in the book of standards is not exceeded.

The corrosion test chamber is now ready for use!

If you have any questions regarding the connectivity of the salt spray chamber, temperature settings or anything else, contact our team of experts at Pacorr testing Instruments. We will be happy to serve you with the best solutions.