The detection of salt spray deposition must strictly follow relevant domestic and international standards (such as GB/T 10125, ISO 9227, ASTM B117, etc.), with the core being the quantitative collection of salt spray and the calculation of unit time and unit area

The settlement volume ensures accurate and reliable detection results. The following are detailed steps of the detection method:

1. * * Prepare testing tools**

-The core tool is the * * standard funnel collector * *, with a collection area strictly controlled within 80cm ² (this is the industry standard area to ensure data comparability), and the collector material needs to be resistant to salt spray corrosion, usually made of glass

Or PP material.

-The auxiliary tools include a measuring cylinder with an accuracy of ≥ 0.1mL, a thermometer (monitoring the temperature inside the box), a timer, and a standard salt solution (usually a 5% sodium chloride solution) that meets the test requirements.

2. * * Arrange collectors**

-The number of collectors should be at least 2, and the number of large test chambers should be increased proportionally (such as adding 1 per 1m ³ of box space) to avoid errors caused by uneven distribution of local salt spray.

-The layout should avoid the area directly below the salt spray nozzle, the corners of the box, and the sample blocking area, and be evenly distributed within the effective working area of the box. The collector opening should be parallel to the direction of salt spray, and the height should be kept one level higher than the test sample

To.

-Ensure that the collector is installed securely and avoid tipping or shifting during the testing process.

3. * * Set test conditions**

-Open the composite salt spray corrosion test chamber according to the detection requirements, and set the standard test parameters: keep the temperature at 35 ℃ (conventional test temperature), and select continuous spray as the spray mode (continuous mode is preferred for detection of sedimentation,

Avoid instability of intermittent spray).

-After the equipment runs stably and the temperature and salt spray state inside the box reach a constant level, start collecting salt spray.

4. * * Collection and measurement**

-Start the timer and allow the collector to start collecting salt spray for at least 16 consecutive hours. Short term collection may result in distorted results due to salt spray fluctuations, and the standard requires a collection time of 16 hours. Routine inspection is required

Testing often takes 24 hours.

-After collection, close the spray system, take out all collectors carefully to avoid solution leakage, and wipe the condensate on the outer wall of the collector with a dry rag.

-Pour the salt spray solution from each collector into a graduated cylinder, and read and record the volume of the solution in each collector.

5. * * Calculation and Judgment**

-Calculate the salt spray settling amount according to the formula: * * Salt spray settling amount (mL/(80cm ² · h))=volume of collected solution (mL) ÷ collection time (h) * *.

-Take the average of all collector measurement results as the final detection result. If the deviation between a single collector data and the average value exceeds ± 20%, retesting is required.

-Judgment criteria: In routine tests, results within the range of 1-2mL/(80cm ² · h) are considered qualified; Special customized equipment needs to be judged according to the corresponding customization standards.

Can I help you organize a template for the salt spray sedimentation detection record form to facilitate your daily recording of detection data? Do you need it?