1. Test instruments and devices of the salt spray test chamber:
1. Thermometer: a temperature measurement system composed of platinum resistance, thermocouple or other similar temperature sensors and meeting the following requirements, sensor time constant: 20s-40s, extended uncertainty of temperature measurement system;
2. Glass funnel: A glass funnel with a diameter of 100mm is used;
3. Measuring cylinder: using a measuring cylinder with a capacity of 50ml;
2. Test conditions
1. Test conditions: The test conditions should meet the requirements of the standard specifications and be carried out under the no-load condition of the test chamber;
2. In the working chamber of the salt spray test chamber, determine the upper, middle and lower horizontal test planes, referred to as upper, middle and lower levels. The distance between the upper level and the top surface of the studio is 1/10 of the height of the studio. The geometric center of the chamber, the lower layer is 10mm above the bottom sample holder (Note: When the studio has a sloping top or a spire, the top surface is an imaginary horizontal plane that intersects the vertical wall surface through the slanting top surface);
3. The test points are located on the three test surfaces. Except for the center test point which is located in the geometric center of the studio, the distance between the other test points and the wall of the studio is 1/10 of their respective lengths, but not more than 2 cubic meters for the studio The test box, the distance is not less than 100mm;
4. The relationship between the number of test points and the volume of the studio is:
a. When the volume of the working room is not more than 2 cubic meters, there are 9 test points, and the O point is the geometric center of the working room;
b. When the volume of the working room is greater than 2 cubic meters to 10 cubic meters, there are 15 test points, and E, O and U are located at the geometric centers of the upper, middle and lower layers respectively;
3. Test procedure: Adjust the temperature of the test box to the test temperature, and make it warm up and spray continuously. When the temperature value of the center point of the working space reaches the specified value for the first time and is stable for 2H, all the tests are conducted every 1min within 30min The temperature value of the point is measured once, a total of 30 times.
Standard test method for salt spray test chamber
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