Why do cars rust, cars rust for a few years

The reason why the car appears rust is generally because: 1. The tiny scratches on the paint surface of the car are oxidized to produce rust; 2. It is easy to rust in places that are prone to water accumulation; 3. The paint surface of the car is relatively soft and easy to be damaged and rusted; 4. In the case of strong winds, the inner layer of the car coat is repeatedly whipped with the car paint, which is easy to rust after a long time; 5. The owner ignores the small rust spots on the body, and then rusts in a large area;

Hello, there is rust when there are iron products. If mine is helpful to you, please set it to the best.

Iron in the air is a process of oxidation all the time, especially in a humid environment such as water, oxidation is faster, and rust is inevitable. If the car is left for a long time, the environment of the place where the car is stored is poor, and it will rust.

When the accident occurred, it was not repaired in place, and when the paint was touched up and putty, it was not repaired in place.

Hello, if you take good care of it, expose the primer, and repair it in time, it's fine.

After a car is manufactured and leaves the factory, its body is subjected to five to ten years or even longer, during which time the environment can be harsh.

Rust (oxidized) is the basic chemical property of many metals, which will occur slowly at room temperature, especially the steel materials commonly used in cars, once rusted, the iron oxide produced will adsorb water molecules in the air, causing more serious rust.

Notes:

The anti-rust treatment of cars is mainly focused on the body. The body that is in the manufacturing process is called the "body-in-white". During the manufacturing process of the body-in-white, anti-rust treatment is carried out using "cathode electrophoretic coating", but this does not prevent the occurrence of rust in the inner cavity.

When manufacturing components with cavities, wax injection holes are usually pre-empted.

Some closed parts will have holes to facilitate the flow of liquid wax when draining wax between wax drains. The body-in-white enters the wax filling section after passing through the various sections before the painting. Generally speaking, cavity wax injection can effectively prevent and prolong the time of cavity car body rust, but it can not completely avoid the essence of car body rust, generally speaking, 3 years of rust-free and 15 years of rust-free wear can be done.

Imported cars and high-end domestic cars do not hurt the paint surface, do not hurt the shell, and are not rusty for life. The welded shell of any vehicle will rust again within two years. Therefore, do not weld the shell of the car if it is not unsightly, this is the experience to remember.

Once the car shell is welded, it will be troublesome and endless.

It has a lot to do with the region and environment, personal driving habits, for example, if you are in the coastal area on 3-5 years of rust, it is easier to rust in places with a large temperature difference between day and night, and it is also easy to rust in the rain or sun.

If the paint of the car is not destroyed, it can be up to 15 years.

European cars will not rust for at least 8 years.

If you take good care of it, you will have no problem for 15 years.

It depends on what brand your car is!

It's related to your maintenance habits, it's hard to say

How harmful is a rusty body?

Some data show that if the body is rusted for 1%, the strength will be reduced by 5%-10%. Problems such as brake failure, steering failure, etc., are related to rust. Because of the accident caused by brake deviation and brake failure, everyone usually thinks that the brake pump is caused by failure, and few people can think that the most fundamental cause of brake pump failure is rust!

The warranty period for cars in our country is relatively short, and car breakdowns caused by rust usually mostly occur after two or three years of car use.

Causes of rust in the body.

1.Design and material reasons.

Some cars are limited by **, brand positioning and other reasons, and it is impossible to use good sheet metal materials, which can easily lead to rust and be hardware. Generally, the higher the car will use more expensive materials, such as hot-dip galvanized steel, all-aluminum materials, high-strength composite materials, automotive carbon fiber, etc., these automotive materials are naturally difficult to rust, who has ever seen the all-aluminum body, chassis will rust!

However, in order to reduce costs, many automobile manufacturers will cut corners, making the performance of automotive materials much worse. We all know that there can be many kinds of anti-rust treatments for automotive steel plates, such as galvanizing, chrome plating, etc., and automobile manufacturers save these processes in order to save costs, which is why the exhaust pipes of some cars are rotten in a few years; In addition, there are some process gaps, such as the difference in coating process, welding process, etc., which will also make the degree of rust appear "congenital" difference.

2.The human factor.

Improper use of the car or "lazy" handling will accelerate the formation of car rust. For example, if the car paint is damaged and not repaired for a long time, it will cause the sheet metal surface in the car paint to rust when exposed to the air.

Driving often walks in waterlogged places, so that the chassis is in contact with water for a long time, which will also cause the chassis to rust.

3.External factors.

The use environment will also affect the rust of the car. There are also places where the environment is not good. Acid rain, corrosive dust, etc.

Heavy moisture, heavy rain, and severe corrosion of the frame. Because the road conditions are not good, I often hit the frame and the base of the gravel, and the surface is damaged, and there are places that are easy to rust. Protections under the engine, exhaust pipes, etc.

The reasons for the rust of the body are: 1. The bumpy vibration of the body caused by uneven roads; 2. The vibration caused by the operation of the engine, the connectors are dewelded or cracked; 3. Cracks on the surface of the paint caused by sunshine and severe cold; 4. The thin steel plate is eroded by water vapor, destroying the protective layer on the inner and outer surfaces, and the body is gradually corroded.

Causes and solutions of rust in many parts of the body: the material of the vehicle itself; Human causes (after the paint is damaged, it is not treated for a long time); Then there is the issue of external factors (related to the use environment). Workaround:

It can be glazed for the car body; Regularly inspect the car body, if there are scratches or rust, repair paint should be carried out in time to prevent rust.

In general, it should be that the car body primer is not done well.

Why do cars rust? Perhaps it's both.

In order to meet the needs of car owners, many automobile companies will now apply several layers of anti-rust paint when producing cars, so that the car will not be so easy to rust, at least until the paint is worn off. However, there are still some brands of cars that are prone to rust, and even a lot of rust appears within a few days of buying it, why is this? In fact, if you want to understand the problem, you have to start from these two aspects.

The first aspect is what material is used in the chassis of the car, and the second aspect is whether the chassis of the car is sprayed well when it is painted.

According to the normal situation, our common car body is made of double-sided excellent galvanized materials, the use of this material can protect the body well, even if it is a long time in the air will not appear rust, at present, half of the world's zinc production is made of it. This means that if your car is made of this material, the quality will be very good and it will not rust for a long time.

However, in order to save costs, many automobile companies switch to ordinary materials when working, so that once the car is sold to the owner, it will rust within two years. Not long ago, a netizen told us that he took his girlfriend to buy a car a month ago, but the car was embroidered everywhere the second month after he bought it, so angry that he took it and returned it directly. So when we buy a car, we must see if the material made of the car is excellent galvanized, if not, don't buy it.

Let's talk about the skill of the craftsman, which is also very crucial, if the worker's technique is not good, it will also lead to rust. And this technology is divided into several types, such as lifting the whole car and then putting it in the electric pool to soak, and finally electrifying the electric pool. This can be done to the car to achieve the effect of anti-corrosion, which is equivalent to spraying a layer of glue on the car, and this technology also has the effect of sound insulation.

However, there are also disadvantages, that is, if you are not careful when painting or reduce the process in order to save costs, the anti-corrosion ability of the car will be much worse.

The engine block of the car is aluminum, but there are other parts that are cast iron, oxidation and rust are normal, just like the iron pot, just a layer on the surface, and the inside is still brand new when brushed off, which is the oxidation protective layer of cast iron.

Oxidized, indicating that there is no anti-rust layer in those places.

Most of the rust of the chassis is caused by the paint peeling off of the surface of the chassis parts, which depends on whether the spraying technology of the parts and components manufacturers is good or not, and whether it is attentive enough, there are many new cars that will cause rust due to paint loss.

The solution is to spray chassis armor when driving a new car, which can effectively alleviate the rust of the chassis!

You can go to the car maintenance shop to make a site armor, the rust of the car starts from the bottom plate, some of the car side beams that have only run for two or three years have begun to appear rust spots, each time the car wash sewage will remain at the bottom, and in the long run, it will form potential corrosion factors, causing damage to the car, if the bottom of your car is sealed, then, even acid rain, snow dissolving, car wash alkaline water can not erode through this layer of protective film. Generally, it is more expensive to go to a car beauty shop to make site armor, you can buy good site armor and spray guns online, and make it troublesome to build it yourself, or spend two or three hundred to the master for construction. My own car is like this, the LDH turf armor I bought during Double Eleven, I went to the maintenance shop to let the maintenance master spray 200 handiwork, and the noise was much smaller!

First of all, a large part of the cause of car rust caused by the design and production process is the problem of design

1. The complete structural design is not considered in the design, and there are sharp corners or dead angles in the sheet metal, resulting in insufficient electrophoresis of the automobile body, or insufficient consideration is carried out in the process of process design, so that the sheet metal is not fully integrated in the process of electrophoresis and wax injection. Of course, if there is a problem in the design or production, then even if the manufacturer does not find it during the test, but after the market, the owner will find the problem in the process of using the vehicle;

2. The second is the problem of the owner, the owner of the car for some car paint scratches are not repaired in time, or the splashed stones hit the car paint is not dealt with in time, sometimes it is just a point of damage to the car paint, but the owner let it go, and the water vapor will have two effects after a long time. One is to react directly with the sheet metal to produce a rust point, and then if left unchecked, it will slowly rust through or expand. Another situation is that due to the damage of the paint surface, water vapor will enter the inside of the paint through the gaps, and the whole paint will explode for a long time;

3. However, considering that the rust of many car owners is from the inside to the outside, and then the car paint is bulging, the rust caused by man is not large.

Millions of car purchase subsidies.

1. External environment: During the long-term use of the car, it will cause wear and tear due to the influence of the external environment, such as acidic substances and dirt in the rain.

2. Man-made original collapse causes: Most of the causes of car rust are caused by the lack of regular maintenance of the car. Therefore, in daily maintenance, if there is a problem with the car, it should be solved in time, such as the surface paint of the car is damaged, resulting in a certain degree of damage, and the chassis is rusted due to long-term contact with water.

We all need to maintain and clean it in time to avoid further damage and further expansion.

3. Reasons for automobile materials: Nowadays, with the popularization of automobiles, most of the materials it uses are iron materials, such as hot-dip galvanized steel, all-aluminum materials, high-strength composite materials, automotive carbon fiber, etc. These materials that are difficult to rust are rarely used, which leads to the inevitable occurrence of rust in the long-term use of the car.

The above is an introduction to what causes rust in cars, in fact, cars also need to be maintained, so everyone should pay more attention to the rusty places of cars to avoid car safety problems caused by rust.