write the reaction when iron tools are not painted
Answers
Explanation:
Rusting happens on the surface of iron objects making it coarse and flaky. It also makes the iron objects fragile. Rusting happens quicker in a humid environment. As a result, it is easier for water tanks and pipes to get rusted. Therefore, various methods are used to reduce the effect of rusting. Getting wounded from a corroded metal object especially rusted iron objects can prove to be dangerous.
Chemistry of Rusting of Iron
Corrosion of any metal is a natural process. It results in the conversion of the metal into its chemically stable form that can be either oxides or hydroxides or sulphides.
Rusting is a type of Chemical Change. It results in the formation of Iron Oxide which is an entirely new substance. Chemical Reaction of Rusting is as follows:
Iron + Oxygen (from environment) + Water (Humidity) —> Iron Oxide (Rust)
Fe + O2 + H2O —> FeO and Fe2O3
Iron occurs naturally in two different forms: Iron (II) and Iron (III).
Scientific Name of Oxide of Iron (II) is Ferrous Oxide (FeO).
Scientific Name of Oxide of Iron (III) is Ferric Oxide (Fe2O3).
Prevention from Rusting
Methods used to prevent Rusting of Iron are as follows:
Alloying – Since Rusting of Iron is a chemical process that happens because the metal is attaining more stable chemical state, alloying (mixing) the iron with other stable metals or alloys can slow down the process of rusting.
Galvanizing – Galvanizing a metal object means to coat the surface of that object with a layer of metallic zinc. Also, it is an inexpensive procedure. In conclusion, it will provide it with protection against rusting.
Coating and Painting – Coating the surface of a metal object with a layer of either Paint or Varnish will break the contact between the surface and atmospheric oxygen making it consequently immune to rusting.
Humidity Control – Controlling the humidity of the environment is also a solution. Therefore, the chances of the metal object rusting will reduce.