The metal tile is made of high-strength aluminum alloy with light weight, strong weather resistance, rich color selection, no discoloration for 20 years, maintenance free, fireproof and moisture-proof, and easy and fast installation. Because of different chemical reactions, aluminum only forms oxide film.
In the process of aluminum tile processing, we can add other anti rust and anti-corrosion metal elements in the aluminum tile, which can also achieve the effect of anti rust. For example, aluminum plate added manganese, manganese has a good antirust function, aluminum plate can become antirust aluminum plate. In the same way, with the addition of magnesium alloy, the density of aluminum plate is relatively lower (the density of magnesium is lower, but the strength is higher) and the strength is increased, becoming aluminum magnesium alloy.
1. Many people think that aluminum is not easy to rust. In fact, aluminum is easier to rust than iron! However, aluminum rusted, not like iron rusted, covered with scars, is still beautiful.
2. Rust, in fact, most of the metal is oxidized by oxygen in wet air. Oxygen is a problem for iron. After rusting, because the rust is loose, oxygen can take advantage of the gap to attack. Aluminum, however, is not. It is easy for aluminum to react with oxygen to form aluminum rust, or alumina for short. This layer of alumina is tightly attached to the surface of the aluminum to prevent the aluminum inside from combining with oxygen.
However, this layer of oxide film is afraid of both acid and alkali, so the aluminum pot is only suitable for cooking, not cooking. Some people often think that the aluminum pot is not bright, and they always wipe it with plant ash or sand. In fact, this is a very unscientific approach.
Therefore, the plant ash can well remove the "coat" of the aluminum pot: it can break the oxide film when rubbing; Plant ash contains potassium carbonate and other alkaline substances, which can dissolve oxide film by chemical action. However, when you just wiped off a layer of oxide film, the aluminum pot brightened a little. Before long, because there was no protection of oxide film, the aluminum continued to oxidize and put on a layer of oxide film again. The aluminum pot was still gray.
Although you pick up the ash every day to wipe, the aluminum pot still regenerates the oxide film every day. In this "tug of war", the aluminum pot is getting thinner and thinner. The aluminum pot has a "skylight" - it's leaking. It took a lot of effort and broke the pot again.
3. Usually the oxide film of aluminum pot is very thin, it is only 0.00001mm thick. In industry, in order to make aluminum products more durable, the aluminum products are often dipped in a solution containing 20% sodium sulfate and 10% nitric acid to make the oxide film thicker.