What are the three conditions for iron to rust, and what conditions are needed for iron to rust?

There are three necessary conditions for iron to rust.

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There are three necessary conditions for iron to rust: the reactive chemical properties of the iron itself.

Oxygen contained in the air under external conditions; Moisture is one of the substances that makes iron rust easily. The most common phenomenon of rust is the oxidation reaction of iron products with oxygen after long-term exposure to air.

Or it is the element oxygen in the water.

Erosion becomes oxide.

There are three necessary conditions for iron to rust.

1. The active chemical properties of iron itself.

2. Oxygen contained in the air under external conditions.

3. Moisture is one of the substances that makes iron easy to rust.

In summary, iron oxide is formed only when oxygen in the air is dissolved in water and the oxygen reacts with iron in the presence of water.

Stuff, that's rust. Rust is a brownish-red substance, it is not as hard as iron, it can fall off easily, and a piece of iron will swell in volume by 8 times after it is completely rusted.

The principle of iron rusting is that iron reacts with oxygen and water to form iron oxide, the chemical equation.

For: 4Fe + XH2O + 3O2 = 2Fe2O3·XH2O (rust.

Suitable temperature, air and moisture.

The conditions required for iron to rust are as follows:

1. The active chemical properties of iron itself.

2. Oxygen contained in the air under external conditions.

3. Moisture is one of the substances that makes iron easy to rust.

Rust is a general term for iron oxides, usually red, which is produced by the redox reaction of vernal difference in the presence of iron and oxygen. Different forms of rust are formed under different circumstances. Rust is mainly composed of ferric oxide hydrate and iron hydroxide.

Other metals can also oxidize, but are not usually called "rust".

After enough time, with sufficient oxygen and water, the iron will completely oxidize to rust. The oxidation of aluminum is very slow because oxygen forms a dense film of aluminium aluminium on the surface of the aluminum, a reaction called passivation.

Conditions for iron rusting: the reactive chemical properties of iron itself. Oxygen contained in the air under external conditions; Moisture is one of the substances that makes iron rust easily.

Ways to prevent iron from rusting:

1. Keep it dry: Iron rust is caused by the dissolution of oxygen in the air in water to promote the chemical reaction of iron rust. Therefore, keep the iron as dry as possible. Place iron in the house in a humid environment.

2. Prevent exposure to the sun: Placing iron in the scorching sun will also promote the chemical reaction of iron oxidation, and it is necessary to prevent iron from being exposed to the sun.

3. Avoid contact with catalysts: Acid can accelerate the oxidation reaction of iron, and it is necessary to avoid letting iron come into contact with acid, as well as some other substances with relatively active properties.

Fe reacts chemically with O in the air with water molecules. Generates rusty iron. The iron in 1 is prone to rust where it comes into contact with the water surface.

2. Medium iron is not easy to rust. 3. Medium iron will not rust. 4. No rust.

5 Most of the iron does not rust. Iron reacts chemically with water and oxygen. All conditions are indispensable.

Anhydrous or oxygen-free. You can't let the iron rust.

Iron rusts under conditions: oxygen, but also moisture.

In contact with air (oxygen), a galvanic battery electrolyte (with water) can be formed, and iron is used as a negative electrode (that is, the metal activity of another conductive material is weaker than iron, such as: copper, carbon, etc.).

Water (humid environment), contact with oxygen (air).

Under the air, there is also moisture, plus time.

The main thing is to have water, oxygen, etc.

After encountering water, it will rust after leaving it for a long time.

The air must contain oxygen.

Oxidation will cause a reaction.

Do you know the conditions under which iron rusts?

Iron rusting is a process of oxidation. 4Fe + 3O2 + XH2O ==2Fe2O3·XH2O This is the chemical equation for iron rusting in moist air. In this redox reaction, water is not oxidized or reduced, but it plays the role of enzymatic touch, which is indispensable.

Therefore, the conditions for iron rust are: iron is in direct contact with oxygen and water.

Whistleblowing|2012-01-17 19:46 Asked by: 叆叇19970118 |Views: 5006 |The question has been merged into I'll help him answer it.

**Symbol numbering layout map You can also enter 9999 words Your submitted reference material is more than 50 words, please delete the reference: Anonymous Submission of Satisfactory Report|2012-01-25 13:39Junior high school has this test**:

It probably means that the iron nail is put into three test tubes, one is dry air (sealing) and one test tube is filled with half of the test tube's water, but a part of the iron nail is left in the air, the third test tube is filled with water and the iron nail is submerged, and then sealed with a layer of oil, and after a few days, it will be found that only the iron nail in the second test tube is rusty, this experiment proves that iron rust must meet the needs of air and water at the same time, that is to say, the iron nail is the most prone to rust in humid air.

Note: The main component that plays a role in the air is oxygen.

The main component of rust is ferric oxide (reddish-brown).

Iron rust is a complex chemical reaction, and the reaction exothermic is a slow oxidation phenomenon.

The first question is that the conditions you give don't seem to be ...... enoughIf the nails are submerged in water, the nails will rust slowly, but at least faster than the air, because there is only water vapor in normal air, and the solubility of oxygen in water is one percentage less so ......

There is no air in the vacuum, so it does not rust.

Appropriate measures are taken according to the conditions under which the iron rusts, such as painting the iron products, plating them with tin or zinc (they form a dense oxide film that separates the contact between the iron and oxygen and water vapor), or adding nickel and chromium to make stainless steel to prevent the iron from rusting.

The main component of the Martian atmosphere (about 95) is carbon dioxide, which has about 3 nitrogen, 1 2 argon, which together is about carbon monoxide and oxygen, and very small amounts of ozone and hydrogen, with a small amount of water vapor.

This means that there is not enough water and oxygen on Mars, so on Mars, iron nails will slowly oxidize, that is, they will slowly rust.

But if it is not strictly said (at least in junior high school) that there is no water on Mars (because there is too little, if there is more water, humans can immigrate to Mars, and oxygen can be obtained by electrolysis of water), so it is approximate that iron nails do not rust on Mars.

Fe reacts chemically with O in the air with water molecules. Generates rusty iron. The iron in 1 is prone to rust where it comes into contact with the water surface.

2. Medium iron is not easy to rust. 3. Medium iron will not rust. 4. No rust.

5 Most of the iron does not rust. Iron reacts chemically with water and oxygen. All conditions are indispensable.

Anhydrous or oxygen-free. You can't let the iron rust.