Inox, also known as stainless steel, has many outstanding advantages and is widely used in life from construction, architecture, industry,… to household items (cups, plates, etc.). spoon,…). The reason stainless steel is widely used is because stainless steel has unique properties that other metals do not have, such as: effective resistance to corrosion and rust. So does stainless steel rust? Surely many of you are still wondering about this question. Let’s find out detailed information with Inox Hoa Giang through the article below!
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Does stainless steel rust?
Stainless steel, also known as stainless steel, is a compound containing iron and some other metals such as Chromium, Nickel, Niobium, Molybdenum and other components. In particular, Chromium is often used to coat the outside and bring shine to stainless steel.
The percentage of metals in stainless steel will create types of stainless steel with unique properties. There are hundreds of different types of stainless steel, but some of the most popular types include Stainless Steel 201, Stainless Steel 304, Stainless Steel 306 and Stainless Steel 430. So do stainless steel types rust?. Let’s explore the anti-rust features of each type of stainless steel.
Is there anything wrong with 304 stainless steel?
Stainless steel 304 is an alloy of steel and chromium, with main components of chromium, nickel, aluminum and other components. Chromium accounts for no less than 12% and can be up to 26% in 304 stainless steel.
The presence of chromium in 304 stainless steel makes its structure stronger. Chromium creates a protective film on the stainless steel surface, resisting oxidizing agents from the environment. Additionally, chromium combines with steel to provide mechanical properties to stainless steel, giving strength and hardness to its structure.
Therefore, 304 stainless steel is difficult for oxidizing agents to penetrate and cause corrosion. This helps 304 stainless steel almost not rust under normal conditions.
Does 201 stainless steel rust?
Stainless steel 201 is a type of stainless steel with high durability, good corrosion resistance and heat resistance. It also has the advantages of being quite easy to clean and aesthetically pleasing. In stainless steel 201, the manganese content is higher and the nickel percentage is lower than in other types of stainless steel. Despite common features such as corrosion resistance, 201 stainless steel can still rust faster than stainless steel types such as 304 and 316.
However, compared to other materials such as aluminum and steel, 201 stainless steel is still a good choice. Because 201 stainless steel still has high durability and significant oxidation resistance.
Does 306 stainless steel rust?
Stainless steel 306 is a stainless steel that does not rust, has similar composition to stainless steel 304, including high levels of chromium, nickel and carbon. Thanks to that, 306 stainless steel is often flexible, easy to bend and resistant to corrosion. It is widely used in the production of household appliances, ships, construction materials and containers.
Does 430 stainless steel rust?
Stainless steel 430 is a type of stainless steel whose main components are iron and chromium. The carbon and nickel content in stainless steel 430 is very little, almost non-existent. Therefore, compared to other types of stainless steel such as Stainless Steel 201, Stainless Steel 304 or Stainless Steel 306, Stainless Steel 430 has lower corrosion resistance, is susceptible to rust, and can appear dull and tarnished due to environmental impacts. nature.
Why does stainless steel also rust?
Stainless steel can still rust after a period of use or being left outdoors for a long time. Here are some main reasons why stainless steel rusts:
Stainless steel is magnetized
Stainless steel can become magnetic during processing, when the cold rolling heat treatment process deforms the surface layer and changes to the Martensite phase.
Stainless steel 304 usually does not rust, while stainless steel 201 is mixed with ferrite compounds, so it is likely to be slightly magnetic and has the ability to attract magnets. Common stainless steels are magnetic and corrosion continues over time when molecules in the air gradually come into contact with the metal surface.
Due to environmental factors
Although stainless steel is a corrosion-resistant compound, if used in an unsuitable environment, it can still be affected and cause rust.
Too much humidity can cause a reaction between the iron metal in stainless steel and water molecules, causing the stainless steel to become brittle and corroded. Therefore, a suitable environment and humidity are needed to preserve stainless steel and ensure quality.
When stainless steel is used in harsh outdoor conditions, frequent exposure to rainwater and dirt can promote corrosion. Rainwater can corrode and destroy the structure of the chromium coating on the stainless steel surface, penetrating inside. That’s why outdoor stainless steel often rusts faster than shielded stainless steel.
Stainless steel does not meet quality standards
Many manufacturers and dealers pursue profits and produce stainless steel that does not meet quality standards, which can lead to a decrease in chromium content and an increase in additives in stainless steel. This reduces stainless steel quality, increasing wear and oxidation. Therefore, choosing reputable stainless steel suppliers is also very important to ensure the quality and shelf life of the product.
Simple tips for treating rusted stainless steel at home are extremely effective
Remove rust from stainless steel with alum
One of the popular methods to remove rust stains on stainless steel surfaces that many people trust is using alum. How to do it is simple. First, boil about 1 liter of water and add 50g of alum. Once the alum has dissolved, you can dip a towel in this solution. Then, gently wring the towel and rub on the rust stains on the stainless steel surface. When done properly, this method can help shine and restore the stainless steel surface to its original state.
Remove rust from stainless steel with lemon juice
One of the simplest ways to remove rust is to use lemon juice. However, you can double the effectiveness by mixing lemon juice with baking soda in equal proportions and stirring well until it forms a thick mixture. Then, apply this mixture to the rust spots on the metal surface. Use a damp sponge to clean rust stains. If traces remain, apply the mixture a second time and let it sit for about 30 minutes. Finally, use a towel to clean the stainless steel surface and you’re done.
Remove rust from stainless steel with dishwashing liquid and potatoes
Both dish soap and potatoes are ingredients available in every home kitchen. This method is very simple. You just need to cut a potato into two pieces and pour dishwashing liquid on the cut surface of the potato.
Then you place the potato piece on the rust stain on the metal surface and let it sit for a few hours. If necessary, you can cut a part of the used potato and continue to pour dishwashing liquid on the new cut side. Then, continue placing the potato on the rust stain as before, but this time let it sit a little longer. Finally, you just need to dry the surface of the items.
It is important to note that each type of metal has its own properties, so before applying this method, test it on a small, invisible area first to ensure it does not harm or change the metal’s surface. type.
Remove rust from stainless steel with rice water
Not only a miracle solution used for beauty purposes, rice water can also be useful in removing rust stains from knives, forks and spoons that have not been used for a long time.
After washing rice, keep a small basin filled with rice water to soak rusty stainless steel items. Don’t rush to throw the water away. Just soak the items in rice water for about half a day, you will be surprised at the effectiveness it brings.
Clean stainless steel with coca soft drink
Coca Cola is a very popular drink and is loved by many people today. However, few people know that this refreshing soft drink also has the ability to remove rust stains on the surface of stainless steel items.
You can pour a little Coca Cola on the rusty areas, then use a rag or sandpaper to scrub the stains. After that, you will be surprised to see that the items become cleaner and shinier.
Above is information to answer the question “Does stainless steel rust?”. Hopefully through the above article you will understand the causes of stainless steel rust and give yourself some tips to help treat rust stains on stainless steel surfaces extremely effectively. And don’t forget to regularly follow the news section of Inox Hoa Giang to update new and useful knowledge!
