Sulfur dioxide flowmeter | Technical parameters of gas flowmeter

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1. Corrosion resistance level WF2, sulfur dioxide corrosion test

The sulfur dioxide corrosion test in corrosion resistance level WF2 is conducted according to the GB/T 2423.33-2021 standard, and the specific experimental conditions and procedures need to be carried out in accordance with the requirements of this standard. The following is a detailed explanation of the relevant experiments:

1. The core basis of the sulfur dioxide corrosion test standard source: The experimental method strictly follows GB/T 2423.33-2021 "Environmental Testing Part 2: Test Methods Test Kca: High Concentration Sulfur Dioxide Test", which is specifically aimed at evaluating the corrosion resistance performance of materials or products in sulfur dioxide environment. Experimental objective: To simulate a high concentration sulfur dioxide corrosion environment and test the corrosion resistance of the sample in sulfur-containing environments such as industrial pollution and chemical scenes, ensuring that it meets the WF2 anti-corrosion level requirements.

II. Experimental conditions and procedures (based on GB/T 2423.33-2021) Gas concentration control: The sulfur dioxide concentration in the test chamber needs to be stable at 0.67% ± 0.07% (volume fraction), and the mixing ratio of sulfur dioxide and carrier gas should be accurately adjusted by a flow meter.

. The carrier gas is usually dry air or nitrogen, with humidity controlled at ≤ 75% RH to avoid water vapor interference with the corrosion process. Temperature and humidity parameters: The temperature fluctuation is set to 25 ℃± 2 ℃, at which the corrosion activity of sulfur dioxide is strong and can accelerate the reaction process. Humidity is maintained through a Sulfur dioxide flowmeter

saturated salt solution or steam injection system to ensure consistency in the testing environment. Exposure cycle: The sample needs to be continuously exposed for 24 hours, during which concentration, temperature, and humidity data should be recorded every 6 hours to ensure stable parameters. After exposure, take out the sample and let it recover for 1-2 hours under standard atmospheric conditions (temperature 23 ℃± 2 ℃, humidity 50% ± 5%) before conducting performance testing. Sample processing: Before the experiment, the surface of the sample needs to be cleaned to remove impurities such as oil stains and dust, in order to avoid affecting the corrosion results. The sample should be placed vertically or horizontally in the test chamber, with a spacing of not less than 20mm, to ensure uniform gas circulation. III. Appearance inspection of evaluation indicators after experiment: Use visual inspection or magnifying glass (5-10 times) to inspect the surface of the sample, and record the distribution, color, and morphology of corrosion products (such as white rust and black spots). Evaluate the proportion of corrosion area. If it exceeds 5% of the sample surface area, it is judged as unqualified. Performance testing: Mechanical performance: Conduct tensile and bending tests on metal samples to detect any decrease in strength and ductility. Electrical performance: Test the insulation resistance and contact resistance of electronic components to ensure that corrosion does not cause electrical faults. Coating adhesion: The adhesion between the coating and the substrate is tested using the scratch or pull method, and failure occurs when the detachment area exceeds 15%. Microscopic analysis (optional): Observe the morphology an

Sulfur dioxide flowmeter | Technical parameters of gas flowmeter

1. Corrosion resistance level WF2, sulfur dioxide corrosion test

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