Solution to the deviation of the temperature and setting in the salt spray corrosion resistance test chamber

The salt spray test chamber is used to detect the corrosion resistance of the metal or certain plating material surfaces and to evaluate the corrosion resistance
of the metal or plating surface based on the results of the salt spray test chamber test.

In the salt spray test, the corrosion resistance
of the test material is studied by observing the corrosion of the test article.

At present, there are three kinds of brine used in salt spray tests: neutral salt solution, acetate solution, and copper-accelerated acetic acid solution
.

The salt spray test chamber is used for corrosion resistance testing and film thickness testing of some metals, alloys, metal coatings, oxide coatings, organic coatings, color paints, varnishes, etc
.

When operating the salt spray test chamber, it can be operated by the temperature controller on the salt spray test chamber to adjust the temperature in the box and the temperature of the pressure barrel to meet the test requirements
.

In addition, the salt spray test chamber can also be used for corrosive gas testing, this type of salt spray test chamber is called sulfur dioxide corrosion test chamber
.

Temperature error is a comprehensive temperature performance index, it includes: temperature control instrument setting value and the actual temperature deviation in the box, temperature fluctuations, temperature uniformity and other items, the following for you to ask for the salt spray test chamber instrument set value and the actual temperature deviation in the box adjustment method: in the salt spray test chamber there are two temperature control instruments, one control the air temperature in the box, the other controls the water temperature
in the saturator.

The setting of these two temperature control instruments has a greater
impact on the temperature error.

For the temperature control in the box, the temperature sensor is close to the box wall, which has a distance from the center of the box geometry, so the temperature measured by the temperature sensor, and the temperature of the center point of the box geometry has a difference, the larger the box content, the greater the difference, in order to eliminate the impact of this deviation on the box temperature control, before the formal test, you should first find out this deviation value and correct, so that the temperature measured is close to the center point temperature
of the box.