Basic knowledge and importance of product salt spray testing

In our hardware industry, it is difficult to say that it is not necessary to do testing for this aspect of treatment. Then the ordinary and commonly used one should be the "salt spray test". In our hardware industry, it is difficult to say that it is not necessary to do testing for this aspect of treatment. Then the ordinary and commonly used one should be the "salt spray test". What exactly is the salt spray test? What are you doing? How much is the salt spray test important to the product? Now let me explain to you the salt spray test.
The salt spray test is an environmental test that tests the corrosion resistance of the hardware product mainly by artificially simulating the salt spray environment conditions of the salt spray equipment. Of course, it is divided into two categories: one is the natural environment exposure test, and the other is the artificial accelerated simulated salt spray environment test. The artificial simulated salt spray test includes a neutral salt spray test, an acetate spray test, a copper salt accelerated acetate spray test, and an alternating salt spray test. The artificial simulated salt spray environment test uses a test equipment with a certain volume space—the salt spray test chamber 用 artificially measures the salt spray environment in its volume space to assess the salt spray corrosion resistance quality of the product. . He is also a more common method. However, compared with the natural environment, the salt concentration of the chloride in the salt spray environment can be several times or several times that of the natural natural salt spray, so that the corrosion rate is greatly improved. The time for the results is also greatly reduced. However, it is worth noting that if a product sample is tested in a natural exposure environment, it may take 1 year to corrode and test under artificial simulated salt spray conditions. It takes only 24 hours to obtain similar results.

We all know that sometimes different test methods are chosen because of the different products. So which test do we choose for our products? It depends on the requirements of your customers. ‚Customer requirements are generalized. We can choose the neutral salt spray test. The requirements are strict. We choose the acetate spray test.


In addition, my friends also asked me, the definition of salt spray test is after we understand, then what is his standard?
In general, it is adjusted to a neutral range (6.5 to 7.2) using a 5% aqueous solution of sodium chloride solution as a solution for spraying. The test temperature is taken at 35 ° C. The sedimentation rate of the salt spray is required to be between 1 and 3 ml / 80 cm 2 · h. The sedimentation amount is generally between 1 and 2 ml / 80 cm 2 · h.





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Microscope Cover

The cover glass is covered on the material on the glass slide, which can avoid the contact between the liquid and the objective lens, so as not to contaminate the lens, and can make the top of the observed cells in the same plane, that is, the distance from the objective lens is the same, so that the observed Images are clearer.Why do you need a coverslip when using a microscope

1. Make the object to be observed form a thin film, which is easy to transmit light and easy to observe;
2. Make the specimen relatively fixed;
3. It is convenient to use the capillary phenomenon to form a gradient when adding various reagents (staining agent, acid, salt solution);
4. Avoid contamination of the specimen.

The purpose of staining the specimen with iodine solution is to make the cells more obvious under the microscope, and it can also kill the cells and prevent the cells from migrating.

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