As we all know, aluminum kettles or aluminum pots will produce a lot of scale after being used for a long time, so how to remove scale? The following small methods will help you remove scale easily.
First, let's understand what scale is produced by boiling water in an aluminum kettle?
The main components of scale are calcium carbonate and magnesium carbonate.
Calcium carbonate is an inorganic compound with a chemical formula of CaCO3, commonly known as limestone, limestone, stone powder, etc. Calcium carbonate is alkaline, basically insoluble in water, and soluble in hydrochloric acid (reacts with hydrochloric acid). It is one of the common substances on the earth, existing in rocks such as aragonite, calcite, chalk, limestone, marble, travertine, and is also the main component of some animal bones or shells.
How to remove scale from an aluminum kettle, teach you these tricks to easily remove scale
Method 1:
Alkali cleaning
Alkali cleaning is the most important part of cleaning aluminum products. Alkaline cleaning agents have good wetting properties, have a strong emulsifying effect on grease, and form soluble soaps; at the same time, they also have an anti-coagulation effect on dirt particles, so that the dirt particles are dispersed in the solution in a colloidal state, rather than deposited on the surface of the parts, and can more thoroughly remove the scale on the aluminum surface.
Method 2:
It is very troublesome to remove the scale in the kettle. Usually, the empty kettle is burned on the fire until the scale is dry and very hot, and then the kettle is suddenly placed in cold water to use the difference in expansion and contraction between metal and scale to make the scale fall off.
This requires repeated heating and cooling four or five times, which is also difficult to be thorough, and it is also damaging to the aluminum kettle. After the above-mentioned "physical" method is used, it is necessary to use chemical methods, that is, to use aluminum kettle descaling agents. But be careful not to use products from non-professional manufacturers to avoid toxicity. In fact, it is very easy to prevent aluminum kettles from scaling. First, after boiling water every time, wait for the water alkali to precipitate, immediately pour it into the thermos, and then pour out the remaining mixed water to prevent the water alkali from scaling.
Method 3:
Ion exchange descaling method: Use specific cation exchange resin to replace calcium and magnesium ions in water with sodium ions. Since the solubility of sodium salt is very high, it avoids the formation of scale with the increase of temperature.
Membrane separation descaling: Nanofiltration membrane (NF) and reverse osmosis membrane (RO) can intercept calcium and magnesium ions in water, thereby fundamentally reducing the hardness of water. The characteristics of membrane separation descaling method are obvious and stable effect, and the treated water has a wide range of applications; but it has high requirements for water inlet pressure, and the equipment investment and operating costs are high.