Nozzle: The nozzle for manufacturing the spray should be made of polypropylene glass or stainless steel. If other materials are used, it must meet the specifications in the standard. The diameter of the nozzle is 1 mm, the spray diffusion angle is 30 degrees, and the standard pressure of the nozzle is 0.7-1.4bar , The distance between the nozzle and the liquid surface is 200-500mm, and it proves to be effective. Monitor this equipment to ensure that the hourly spray is controlled within the specified limit. The spray port can be monitored using a flow sensor method. If there is more than one nozzle, each nozzle Both require special flow and control sensors. The spray cannot be directed at the sample and needs to be sprayed against the barrier or the instrument wall. If the spray head is at the bottom, spray upward. Example 1 spray can only be carried out in a large-capacity instrument. Make sure that no sample is placed above the spray head. You need to select the number and arrangement of spray ports to ensure that the standard meets the standard specifications.
Cabinet: The cabinet of the salt spray test cabinet needs to be able to be heated, and it can maintain the pressure balance, and it needs to install measurement and control sensors to control the test temperature. The SS and ASS tests in the closed cabinet are (35 ± 2) ℃, CASS test is (50 ± 2) ℃. The test container requires a minimum volume of 400 liters, and can ensure that the sprayed condensed droplets will not drop from the top or the side wall and hinder the sample from contacting the spray. After spraying, the test solution Can not be reused. The effective space of the test is limited to the part outside the nozzle in the box, which has a uniform spray diffusion range that can be verified.
Liquid supply tube: a container for storing test solution for spraying needs to be designed to keep the head of the pump pump unchanged during the test, compressed air supply conduit and air humidification: an air humidifier needs to be designed to ensure that the test During the process, the compressed air is filled with water at the required temperature. The conduit between the nozzle and the compressed air should have a pressure standard to monitor the air pressure of the nozzle, the device supporting the sample: the sample is fixed with a bracket to keep it in salt In the fog area and ensure that there is no contact with each other, thereby eliminating the possibility of contact corrosion, there must be a certain distance between the samples to ensure that the same condensed solution will not drip onto another sample. The sample panel is 60 to Placed at 70 degrees, one side of the test needs to be exposed to salt mist. Product parts should be installed in the instrument according to the size, shape or erosion state exposed during use. This position must be approved. Special attention should be paid to ensure that as little salt solution as possible Gathered at the hole.
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