According to the salt spray test chamber standard ASTMB-117-2003, the standard implementation specification for the operation of salt spray (atomization) devices specifies the equipment, procedures, and conditions required to create and maintain a salt spray test environment. This specification does not specify the test type and test time for a specific product, and the test results of all tested samples are uniform.
The standard specification provides a controllable corrosion environment. Use it to determine the relevant corrosion resistance data and scientific basis for the metal coating exposed in a specific test chamber. When the salt spray results are used as independent data, the natural environment Performance predictions are rarely related to this. The correlation and extension should only exist in the case of further confirmed long-term atmospheric exposure. The reproducibility of the results in the salt spray test depends entirely on the type of test and the evaluation criteria and operating variables selected The control of the test must include enough repetition in any test project to determine the variability of the results. When testing similar tests in different spray chambers, even if the test conditions are nominally similar and within the scope of this implementation specification, you can Variability was observed.
The spray device of the salt spray test chamber includes an atomization chamber (that is, the test chamber box), a salt solution storage tank, a properly adjusted compressed air source (that is, an air saturation barrel), one or more spray nozzles, and a test bracket , The equipment and necessary control method for heating the atomization chamber (ie, thermostat), the size and detailed structure of the test chamber are optional, as long as the conditions obtained meet the requirements of this specification, during the test, the following 4 Points to note:
1. The solution accumulated on the ceiling or top of the spray chamber is not allowed to drip on the sample to be tested, causing large-scale salt water corrosion. (The lid of the salt spray test chamber of Shanghai Linpin Instrument Co., Ltd. is designed with a V shape. 106 degree oblique angle to ensure that no salt spray accumulation site will be formed);
2. The solution dropped on the test cannot be recycled;
3. The building materials must not affect the corrosiveness of the mist
4. The proportion of brine must be pure or distilled water, not for tap water.
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