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Glass Boiling Resistant Mixed Alkali Aqueous Aqueous Corrosion Detection Device When testing the alkali resistance of glass, the influence of the surface structure should be considered when measuring the alkali resistance of glass materials.
The test sample must be pretreated with mixed acid.
The mixed solution of hydrofluoric acid solution-2mol/L hydrochloric acid solution (1:9) was completely immersed and stirred with a magnetic stirrer for 10 minutes, and tweezers (the head was covered with plastic or platinum, treated with dilute hydrochloric acid before use, and then with water) Washing) Take out the test sample, wash, dry, cool and weigh according to the above method
.
The test container is immersed in a heating bath, and 400ml of 0.
5mol/L sodium carbonate solution and 400ml of 1mol/L sodium hydroxide solution are added to the test container, so that the liquid level in the test container is consistent with the liquid level of the bath
.
Cover the lid, install the Gooch glass funnel and the condenser, turn on the water flow of the condenser, start the stirrer and heat the bath, so that the temperature in the test container reaches 102.
5°C + 0.
5°C, and the dripping speed of the reflux liquid should be controlled to be every 4 ~6 seconds for 1 drop
.
Then open the lid and hang the test sample on the hook of the container lid with silver wire, and immerse the test sample in the boiling solution (no collision between the test samples and between the test samples and the wall of the container) and boil continuously for 3 hours 2 minutes
.
Take out the test sample and quickly put it into 1mol/L hydrochloric acid solution for three times
.
Washed with water three times, rinsed with acetone or absolute ethanol, dried at 110°C for 60 minutes, transferred to a desiccator and cooled to room temperature, then accurately weighed and recorded its mass (m2)
.
Representation and grading of results Calculation of the mass lost per unit surface area of the test sample for each measured result
The test sample must be pretreated with mixed acid.
The mixed solution of hydrofluoric acid solution-2mol/L hydrochloric acid solution (1:9) was completely immersed and stirred with a magnetic stirrer for 10 minutes, and tweezers (the head was covered with plastic or platinum, treated with dilute hydrochloric acid before use, and then with water) Washing) Take out the test sample, wash, dry, cool and weigh according to the above method
.
The test container is immersed in a heating bath, and 400ml of 0.
5mol/L sodium carbonate solution and 400ml of 1mol/L sodium hydroxide solution are added to the test container, so that the liquid level in the test container is consistent with the liquid level of the bath
.
Cover the lid, install the Gooch glass funnel and the condenser, turn on the water flow of the condenser, start the stirrer and heat the bath, so that the temperature in the test container reaches 102.
5°C + 0.
5°C, and the dripping speed of the reflux liquid should be controlled to be every 4 ~6 seconds for 1 drop
.
Then open the lid and hang the test sample on the hook of the container lid with silver wire, and immerse the test sample in the boiling solution (no collision between the test samples and between the test samples and the wall of the container) and boil continuously for 3 hours 2 minutes
.
Take out the test sample and quickly put it into 1mol/L hydrochloric acid solution for three times
.
Washed with water three times, rinsed with acetone or absolute ethanol, dried at 110°C for 60 minutes, transferred to a desiccator and cooled to room temperature, then accurately weighed and recorded its mass (m2)
.
Representation and grading of results Calculation of the mass lost per unit surface area of the test sample for each measured result
