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Precautions for using a salt spray test chamber
Category: Industry News
The salt spray test chamber simulates the salt spray corrosion that some materials undergo in the air and is widely used in various industries. Salt spray test chambers can simulate various corrosion conditions and are generally divided into three categories: neutral solution salt spray corrosion, acidic salt solution test, and copper salt acetic acid corrosion. Different test solutions are selected according to the test material. In addition, there is a salt spray test chamber known as a sulfur dioxide test chamber that determines the corrosion resistance to acidic gases. Let's learn about the precautions for using a salt spray test chamber!
When conducting a test with a salt spray test chamber, a salt solution needs to be prepared in advance, suitable for current use. In actual operation, you can also follow the instructions of the salt spray test chamber to avoid errors that affect the test results. The following are the main precautions when using a salt spray test chamber:
1. Do not open the lid of the test chamber during the test to prevent rapid temperature changes inside the chamber, excessive heating output causing an overtemperature alarm, and salt spray from the chamber corroding surrounding equipment. To observe the test conditions of the product, turn on the demister switch. The mist must dissipate from the window for about a minute before observing the product.
2. When the test is completed and no further tests are to be conducted temporarily, or when the ambient temperature is below 0 degrees Celsius, the water in the chamber and the pressure tank should be drained to prevent water deterioration and freezing in the tank from affecting the next test.
3. The water used for heating in the chamber and pressure tank must be neutral. To avoid affecting the test results, it cannot contain acids or alkalis. The water used with sodium chloride must be distilled water or deionized water. Groundwater or tap water is prohibited.
4. The compressed air used in the test must be dry air. If a large amount of moisture is found in the air, the moisture in the air must be immediately discharged to avoid affecting the test results.
5. When venting, the exhaust pipe connected to the mechanical platform must be unobstructed to prevent the moisture in the mist from condensing and blocking the normal exhaust, making it impossible to conduct the test.
6. The machine should be kept clean at all times.
7. Please read the controller manual and related manuals carefully before operating this machine.
The salt spray test chamber can review the ability of materials and their protective layers to resist salt spray corrosion and compare the technical quality of similar protective layers, while also reviewing the ability of certain products to resist salt spray corrosion.
With the widespread application of salt spray test chambers in machinery, national defense, and light electronics industries, salt spray testing has become widely known. In fact, salt spray testing measures the corrosion resistance of a product under specific conditions, generally tested in an atmospheric environment.
The atmospheric environment of the salt spray test chamber is a variety of corrosive environments. Tests conducted in the atmosphere show that oxygen, temperature changes, air humidity, and pollutants in the atmosphere are the main corrosive components and factors. Salt spray is a major corrosive component in the atmosphere and is destructive. This mainly refers to the atmosphere of chlorides, which originates from the ocean or some heavily saline-alkali land. Its main component is sodium chloride.
Salt spray corrosion in the salt spray test chamber on the surface of metal materials is mainly because the chloride ions in the salt spray penetrate the oxide layer on the surface of the metal and undergo an electrochemical reaction with the protective layer and the internal metal. Based on this, the acid or alkali resistance of the product can be determined.
The above is an introduction to the precautions for using a salt spray test chamber. If you need to learn more, please feel free to contact us!
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