Why does metal rust Why doesn t plastic rust?

1.Iron is oxidized by oxygen in moist air.

In humid air, when the oxygen valence and the rate of operation in the air are high, it often swaps positions with the oxygen in the water vapor, the oxygen rate that has just been replaced from the water vapor is unstable, and there is a single atomic oxygen instantaneously, which has strong oxidation performance, and at that time, it is exactly the same as the valence and rate of iron, so it is easy to combine with iron to form ferric oxide. The texture of ferric oxide is loose and moisture-absorbing, forming a vicious circle of iron rust. In addition, a small amount of carbon dioxide in the air can be dissolved in water to form local carbonic acid, which reacts with iron, which is also one of the reasons for iron rust.

The composition of iron is not pure, or it is more prone to rust in places where the internal stress or deformation is greater due to external force. This is because these external factors can make the valence and velocity of iron unstable, and when the valence and electrons change or wait, the valence and movement of foreign substances are taken advantage of the void and combine with iron to form iron oxides.

2.Rust of copper.

Copper can react in the presence of water, CO2 gas and O2 gas to form patina. Due to the dissolution of CO2 and a small amount of O2 gas in water, copper is easy to rust under wet conditions, that is, patina is the product formed by the combined action of Cu, CO2, H2O and O2; Iron can form rust in the presence of water and O2 gas, that is, it is the product of the combined action of Fe, H2O, O2 and other substances, regardless of their shape. Through the comparison of reaction conditions, it can be seen that iron is more prone to rust than copper, and iron is more mobile than copper.

3.How to prevent rust?

a.Can be oiled on the surface bIt can also be coated with a dense oxide film. c.The surface can be covered with plastic film. d.Dry the metal every time it is used and put it in a dry place.

Different stainless steels have different causes of corrosion. In general, corrosion occurs due to the following reasons:

Exposure to sensitive substances. For example, 304 stainless steel is easy to corrode in the marine environment;

Electric field corrosion. After stainless steel comes into contact with some liquid, it will directly form a galvanic battery with other substances, causing corrosion;

Structural damage. Under the influence of mechanical force, temperature, etc., the internal atomic arrangement of stainless steel changes, which will lead to a decrease in corrosion resistance; ......

There is no metal that is absolutely rusty, in addition to iron, there are chromium, nickel, lead, silicon, etc., after adding these elements, the properties of steel will change, and its surface will form a dense oxide protective film, which greatly improves the resistance of stainless steel.

Answer: Stainless steel has the ability to resist atmospheric oxidation--- that is, stainless steel, and also has the ability to corrode in media containing acid, alkali and salt--- that is, corrosion resistance. However, the size of its corrosion resistance is changed with the chemical composition of the steel itself, the state of the additive, the use conditions and the type of environmental medium. For example, 304 steel pipe, in a dry and clean atmosphere, has absolutely excellent rust resistance, but if it is moved to the coastal area, it will soon rust in the sea fog containing a lot of salt; The 316 steel pipe performed well.

Therefore, not any kind of stainless steel can resist corrosion and rust in any environment.

Stainless steel has the ability to resist atmospheric oxidation--- that is, stainless steel, and also has the ability to corrode in media containing acid, alkali and salt--- that is, corrosion resistance. However, the size of its corrosion resistance is changed with the chemical composition of the steel itself, the state of the additive, the use conditions and the type of environmental medium. For example, 304 steel pipe, in a dry and clean atmosphere, has absolutely excellent rust resistance, but if it is moved to the coastal area, it will soon rust in the sea fog containing a lot of salt; The 316 steel pipe performed well.

Therefore, not any kind of stainless steel can resist corrosion and rust in any environment.

Stainless steel refers to a steel grade that has a high degree of chemical stability in corrosive media. However, stainless steel is not necessarily acid-resistant. Corrosion is susceptible to occurrence under acidic conditions, such as cutting fruits in life without wiping them cleanly, or in an atmosphere of water vapor.

Or in industrial production, various corrosive media, such as: various acids (nitric acid, sulfuric acid, etc.), various organic acids (such as acetic acid, etc.), as well as various salt baths (such as seawater, etc.) will make it corrosive, but you can try to use acid-resistant steel. Not easy to corrode.

That's how I studied metals.

Stainless steel is not easy to rust, not really will not rust, if the use of environmental conditions is too poor, it will rust, such as strong acid and alkali working environment, some stainless steel three months to rust can not be used.

1. In the process of kitchen decoration, it is inevitable that cement and oil will remain around the sink, and if it is not cleaned immediately, it is likely to cause rust or mold;

2. In daily life, if the indoor dust containing minerals and acids and alkalis floats on the surface of the sink, coupled with the humidity of the air, it will also lead to the appearance of "floating rust".

Sticky welding slag is easy to rust.

Question 1: Will plastic steel rust? The plastic steel profile is made of polyvinyl chloride (PVC) resin as the main raw material, so the plastic steel is not steel, nor is it metal, and it itself will not rust.

Question 2: Why is the plastic steel window rusty The lining steel inside the plastic steel window is embroidered in the water. Glue the hole where the expansion tube is installed.

Another possibility is that the rubber strip you use is not good, it will be oxidized for a long time, and the yellow water will be left on the plastic steel and out of tune. When using adhesive strips, it is best to choose a better one. than the "window friend" card and so on.

At least, the acacia should be above 7000 yuan tons so that similar things will not occur.

Question 3: What should I do if the plastic steel window is rusty? Plastic steel materials are almost not picky about the environment.

All of its resistances are ideal.

It should be a product quality problem.

The surface is corroded and oxidized to form a transparent film.

In short, he is a PVC type of plastic.

I wear not all of the metal.

I feel like I'm still looking for a seller to solve it.

It's better, maybe you don't have acid rain?

In this case, the product itself is not good.

This is more likely to happen.

=end ==

Hope that helps.

The painting that I said upstairs was doable

.He was lazy and left nothing.

Question 4: Plastic steel: Is it hard, is it glue, is it rusty, is it oxidized, is it rotten, and those who know come in, thank you How can plastic steel be oxidized, rusted and rotten when it is a plastic? If you want that function, there will be no white pollution.

Question 5: Just installed the plastic steel window found that there is a small hole, can it rust in the rain It is best to clarify where the damage is, this is not necessarily, it depends on whether it is connected with the chamber of the steel lining.

Question 6: How to deal with rust dripping on plastic steel doors and windows? Toothbrushes can easily fall off when they get stained with toothpaste.

Plastic steel profile is referred to as plastic steel, and the main chemical composition is PVC, so it is also called PVC profile. It is a new type of building material that is widely used, because of its physical properties such as rigidity, elasticity, corrosion resistance, and excellent aging resistance, it is usually used as a good substitute for copper, zinc, aluminum and other non-ferrous metals.

Question 8: How to remove the rust on the plastic steel window 1, dilute with oxalic acid, warm water, pour it in an iron bucket, brush it with a brush, the effect is good 2, use sodium hydroxide, rust and its iron hydroxide precipitation, and iron does not react with sodium hydroxide, buy igneous soda or caustic soda on the market, that is, sodium hydroxide 3, apply a layer of paint 4, wipe it clean with sandpaper.

Question 9: I would like to ask, my plastic steel doors and windows have become very dirty overnight, and they are still as rusty as they are. Use Yidun doors and windows to remind you that this may be a quality problem, and find a dealer to consult.

Question 10: How to clean the plastic steel window covered with rust Generally speaking, the FRP thing itself is not a metal type, and there should be no iron in theory, there are two possibilities: first, it is not the molten of FRP, and second, the iron on the surface is splashed to other metals, such as iron slag or welding slag, and some iron should be scraped off in an inconspicuous place, and then consider the cleaning material, if it is a non-FRP metal, it can be removed with a WD40 and other removal and grip agent, if it is stained or adhered to FRP, it can be scraped off with a general soft cleaner.

In everyday life, stainless steel can be found everywhere. So the question is, do you know why stainless steel rusts? What are the conditions in daily life that are easy to cause stainless steel to rust? Next, let me give you a brief introduction.

The reason why stainless steel rusts is that its corrosion resistance will change with factors such as the steel itself, the state of the reinforcement, and the environment in which it is used. For example, 304 steel pipe has the advantage of rust resistance in a dry atmosphere, but if it is used in a coastal city, it is easy to rust because the air contains a lot of salt.

Which situations in daily life are easy to cause stainless steel to rust.

Although there are many ways in which the table can be destroyed, the following situations are more common in daily life:

1. In the process of kitchen decoration, it is inevitable that cement and oil will remain around the sink, and if it is not cleaned immediately, it is likely to cause rust or mold;

2. In daily life, if the indoor dust containing minerals and acids and alkalis floats on the surface of the sink, coupled with the humidity of the air, it will also lead to the appearance of "floating rust".

During use:

1. Kitchen knives, scissors and other products placed on the surface of the sink for a long time will also lead to mildew and discoloration of stainless steel;

2. In addition, if the cleaning agent and sauce remain in the sink, it will also cause mold on the surface of the sink over time;

3. Due to the poor water quality in most areas of the country, coupled with the fact that most of the water pipes are galvanized pipes, and the iron content in the water is high, if there are many water stains left in the sink, it will rust after a long time. Especially for new house decoration, if the water stains on the sink are not cleaned in time, it will easily cause rust.

Summary: After reading the above introduction, I believe you have a further understanding of why stainless steel rusts. If you need to know more about it, please continue to ******, and more exciting content will be presented to you in the future.