Chemistry In Descaling Agents

- Dec 28, 2018-

Scale is commonly referred to as water rust. It refers to crystals formed by the accumulation of impurities in natural water on the inner surface of the boiler. It is generally white or yellowish white. The main components of scale include calcium carbonate, magnesium carbonate, magnesium hydroxide, calcium sulfate, magnesium sulfate, calcium chloride, magnesium chloride and the like. The thermal conductivity of the scale is poor, and the excessive scale in the boiler will cause the thermal efficiency to decrease, and the heavy one will cause the boiler to burst and cause a boiler accident. After the scale is formed, it should be removed by mechanical or chemical methods in time. So what are the ways to remove scale?


First, it is treated with dilute hydrochloric acid, vinegar, lemon, etc. The principles of these methods are the same, using acid and scale reactions to eliminate scale. It should be noted that since the carbonate will generate gas when it reacts with dilute hydrochloric acid, the cover cannot be covered during cleaning, otherwise there is a risk of explosion. In addition, the acidity of vinegar and lemon is not strong enough, so it is best to add lemon water or vinegar in the pot, add boiling water and keep boiling for a period of time, which is more conducive to the removal of scale.


The second is to use scale cleaner to remove scale. The main component of the commonly used scale cleaner for drinking fountains is 2-hydroxypropane-1,2,3-tricarboxylic acid. In fact, it is citric acid, which is often referred to as white granules or powder. This cleaner is safe, non-toxic and environmentally friendly, suitable for home use.