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Ozone generation principle and ozone concentration detection method of ozone aging chamber
Date: Jan 31,2024 Views: 161
Ozone generation principle and ozone concentration detection method of ozone aging boxOzone aging is suitable for aging crack testing of non-metallic materials and rubber products. The ozone aging chamber simulates and strengthens the ozone concentration in the atmosphere, studies the action of ozone on rubber, and quickly identifies and detects the anti-ozone aging performance of the sample and the protective effectiveness of the anti-ozonant agent, and then adopts effective anti-aging measures to improve rubber products. service life.
In the experiment, the concentration control of ozone is very important, that is, the amount of ozone produced is more important. Let's give a detailed explanation of the principle of ozone production below.
Ozone aging chamber ozone generators can be divided according to their principles: corona discharge type, electrolysis type, ultraviolet irradiation type, and nuclear radiation type (generally the most widely used is the corona discharge electric ozone generator. It is composed of an ozone tube, It consists of ozone power supply, gas source device and electronic control device).
Ozone is naturally formed from diatomic oxygen under ultraviolet radiation through electron emission or exposure to sunlight. Industrially, it is produced by silent discharge using dry air or oxygen and AC voltage of 5~25kv. In addition, ozone can be produced by electrolyzing dilute sulfuric acid at low temperature or heating liquid oxygen. Because of the instability of ozone, ozone is generally produced on site. The commonly used ozone method is electrolysis, which electrolyzes water into oxygen elements, and then turns the free oxygen in it into ozone.
Common ozone concentration detection methods in ozone aging test chambers include: ozone iodine content method, ozone ultraviolet absorption method, ozone electrochemical method, and ozone colorimetric method. Below we give a brief introduction to these methods.
1.Ozone iodometric method
Use ozone aging gas to free the iodine in the potassium iodide solution to develop color, then titrate with sodium thiosulfate to reduce it to colorless, and calculate the ozone concentration based on the number of sodium thiosulfate consumed.
2. Ozone UV absorption method
Use ozone gas to free the iodine in the potassium iodide solution to develop color, then titrate with sodium thiosulfate to reduce it to colorless, and calculate the ozone concentration based on the number of sodium thiosulfate consumed.
3. Ozone electrochemical method
Use ozone gas to free the iodine in the potassium iodide solution to develop color, then titrate with sodium thiosulfate to reduce it to colorless, and calculate the ozone concentration based on the number of sodium thiosulfate consumed.
4.Ozone colorimetry
It is a chemical method like the iodometric method, which uses the color or decolorization phenomenon caused by the reaction of ozone with chemical reagents to determine the ozone concentration.
