The principle of rusting iron nails:
Rusting is a chemical reaction, when iron is left for a long time it will rust. Iron rusts easily, not only because of its active chemical nature, but also because of the external conditions. Moisture is one of the substances that make iron rust easily.
However, only water does not make iron rust either. Only when oxygen in the air is dissolved in water, oxygen reacts with iron in the environment with water to produce something that is iron oxide, which is rust.
Rust is a brownish-red substance that is not as hard as iron and can be easily shed. When a piece of iron is completely rusted, the volume can expand 8 times. If the rust is not removed, the spongy rust is particularly prone to absorbing moisture, and the iron will rust faster. Iron will be heavier when it rusts, about 3 to 5 times its original weight.
Iron nails are very common in our daily lives nails, it is also very wide range of applications, but iron nails have a disadvantage is easy to rust, I will tell you what methods to prevent the rust of iron nails.
Prevent nails from rusting can be the following methods:
1, the composition of the alloy to change the internal structure of iron. For example, chromium, nickel and other metals added to ordinary steel made of stainless steel, it greatly increases the rust resistance of steel products .
2、Covering the surface of iron products with a protective layer is a common and important method to prevent iron products from rusting. Depending on the composition of the protective layer, it can be divided into the following categories:
a. Coating the surface of iron products with mineral oil, paint or firing enamel, spraying plastic, etc. For example: carriages, buckets, etc. are often painted, and machines are often coated with mineral oil, etc.
b. Plating on the surface of iron and steel with electroplating, hot plating and other methods, such as zinc, tin, chromium, nickel and so on, a layer of rust-resistant metal. These metals can form a dense oxide film on the surface, thus preventing iron products from rusting in contact with water, air and other substances.
c. Chemically make the surface of iron products generate a layer of dense and stable oxide film to prevent iron products from rusting.
3、Keeping the surface of iron products clean and dry is also a good way to prevent iron products from rusting.
Post time: Jun-06-2023