What is rusting? List the main causes of rusting
Answers
hey !
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Rusting is caused by the oxidization of the iron in the steel creating iron oxide. This is generally caused when moisture and oxygen are present. There are several ways to prevent oxidization:
Pickling - place the steel or iron in oil and keep it well coated. This method is often used for firearms and works by keeping the moisture out of the steel.
Coating- using a paint product to coat the steel keeps both moisture and oxygen from attacking the steel. complete coverage is important to keep the steel from rusting.
Galvanizing or zinc coatings - These methods utilize cathodic protection or a “sacrificial metal” to protect the steel. The zinc is attacked before the oxygen begins to work on the steel the prolonging and preserving the steel during the oxidization process.
Materials selection - Use of high grade stainless steel is another alternative. While expensive stainless does not generally rust as easy as steel or Iron and thus is widely used for marine applications where conditions for rusting are ideal.
hope it helps
Rust is an iron oxide, a usually reddish brown oxide formed by the reaction of iron and oxygen in the presence of water or air moisture.
Some of these factors are listed below.
Moisture: The corrosion of iron is limited to the availability of water in the environment. Exposure to rains is the most common reason for rusting.
Acid: if the pH of the environment surrounding the metal is low, the rusting process is quickened. The rusting of iron speeds up when it is exposed to acid rains. Higher pH inhibits the corrosion of iron.
Salt: Iron tends to rust faster in the sea, due to the presence of various salts. Saltwater contains many ions that speed up the rusting process via electrochemical reactions.
Impurity: Pure iron tends to rust more slowly when compared to iron containing a mixture of metals.
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