Five key elements for conducting salt spray corrosion tests

The Five Elements for Conducting Salt Spray Corrosion Test:zj9Textile Testing Instruments, Testing Equipment Manufacturer
1. Salt Spray Test Boxzj9Textile Testing Instruments, Testing Equipment Manufacturer
The box should be able to be heated and maintain pressure balance, and sensors for measurement and control should be installed to control the test temperature. SS and ASS tests in a sealed box are (35amp;plusmn; 2) ℃, and CASS tests are (50amp;plusmn; 2) ℃. The test container needs to have a small volume of 400 liters, In addition, it can ensure that the condensed droplets of spray will not drop from the top or side wall and prevent the sample from contacting the spray. After spray, the test solution cannot be reused. The effective space for testing is limited to the part outside the nozzle in the box that has a uniform and verifiable spray diffusion range. It is more detailed in paragraph 7.2 and paragraph 3 of sub-clause that.zj9Textile Testing Instruments, Testing Equipment Manufacturer
2.nozzlezj9Textile Testing Instruments, Testing Equipment Manufacturer
The nozzle for spray manufacturing should be made of polypropylene glass or stainless steel, If other materials are used, they must comply with the instructions in subclauses 7.2 and 8.6. The nozzle diameter is 1 mm, the spray diffusion angle is 30 degrees, the nozzle standard pressure is 0.7-1.4 bar, and the nozzle is 200-500 mm away from the liquid surface, and it is proved to be effective. Monitor this equipment to ensure that the hourly spray is controlled within the specified limits.zj9Textile Testing Instruments, Testing Equipment Manufacturer
The spray nozzle can be monitored by means of a flow sensor. If there are more than one nozzle, each nozzle needs a special flow and control sensor. The spray cannot face the sample directly, but needs to be sprayed to the barrier or instrument wall. If the nozzle is at the bottom, spray upward (Figure 1, example2). The spray of Example1 can only be carried out in a high-capacity instrument to ensure that no sample is placed above the nozzle.zj9Textile Testing Instruments, Testing Equipment Manufacturer
The number and arrangement method of spray outlets need to be selected to ensure that the description of effective space in sub-clause 7.2 and 8.6 can be achieved.zj9Textile Testing Instruments, Testing Equipment Manufacturer
3.liquid supply pipezj9Textile Testing Instruments, Testing Equipment Manufacturer
A test solution container for spray storage needs to be designed to keep the head of the pump unchanged during the test.zj9Textile Testing Instruments, Testing Equipment Manufacturer
4.Compressed Air Supply Conduit and Air Humidificationzj9Textile Testing Instruments, Testing Equipment Manufacturer
An air humidifier needs to be designed to ensure that the compressed air is filled with water at the required temperature during the testing process. The duct between the nozzle and compressed air should have a pressure standard to monitor the air pressure at the nozzle.zj9Textile Testing Instruments, Testing Equipment Manufacturer
5.Devices to Support the Samplezj9Textile Testing Instruments, Testing Equipment Manufacturer
Fix the sample with a bracket to keep it in the salt spray area and ensure that it does not come into contact with each other.zj9Textile Testing Instruments, Testing Equipment Manufacturer
So as to eliminate the possibility of contact corrosion. There needs to be a certain distance between samples to ensure that the condensed solution on one sample does not drip onto another sample.zj9Textile Testing Instruments, Testing Equipment Manufacturer
The sample panel should be placed at a horizontal angle of 60 to 70 degrees, and one side of the test should be exposed to salt spray. Product components should be installed in the instrument according to their size, shape, or the erosion state exposed during use. This position must be agreed upon. Special attention should be paid to ensuring that as little salt solution as possible will accumulate at the pores.