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铝瓦为什么还会生锈?

来源:http://www.luchuangjiancai.com/ 时间:2021-06-16 浏览量:

金属瓦采用高 强度铝合金,重量轻,耐候性强,颜色选择丰富,颜色保持20年不变色,免维护,防火、防潮,安装简便快捷。因为化学反应不同,铝只会形成氧化膜。
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.
在铝瓦加工过程中,我们可以在铝瓦的里面加入其他防锈防腐蚀的金属元素,这样也可以达到防锈的效果。比如铝板添加了锰元素,锰拥有良好的防锈功能,铝板就可以成为防锈铝板了。同理,添加了镁合金,铝板的密度相对降低(镁的密度较低,但强度较高)强度增加,成为铝镁合金了。

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.许多人都认为铝不容易生锈,事实上铝比铁还容易生锈!不过铝生了锈,不像铁生了锈那样满身是疤,仍是漂漂亮亮的。
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.生锈,实际上大都是金属被湿空气中的氧气氧化了。氧气对于铁来说,是麻烦的事。铁器生锈后,由于铁锈是疏松的,氧气可以趁隙进攻。铝却不然,铝很容易与氧气化合成铝锈──三氧化铝,或简称氧化铝。这层氧化铝紧紧地贴在铝的表面,可以防止里头的铝与氧气化合。
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.
不过这层氧化膜既怕酸又怕碱,所以铝锅只宜煮饭不宜做菜。常有人嫌铝锅不光亮,老是用草木灰或沙子去擦。其实,这是一种很不科学的做法。
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.
草木灰所以能够很好地去掉铝锅的这件“外套”:摩擦时能擦破氧化膜;草木灰含有碳酸钾等,是碱性的物质,能够借化学作用溶解氧化膜。但是,当你刚刚擦掉了一层氧化膜,铝锅亮了一些,没多久,铝因为没有氧化膜的保护,又继续氧化了,重新披上一层氧化膜,铝锅照旧是灰蒙蒙的。
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.
尽管你天天拿起草木灰擦,铝锅照旧天天重新生成氧化膜。在这场“拉锯战”中,铝锅越来越薄。铝锅开了“天窗”──漏了。又费力气,又把锅弄坏了。
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.平常铝锅的这层氧化膜很薄,它只有0.00001毫米那么一点厚。在工业上,为了使铝制品更能经久耐用,常常把做好的铝制品浸在含有20%硫酸钠与10%硝酸的溶液里,使这层氧化膜更加厚。
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.