What is stainless steel how does building materials of stainless steel maintain

2020-07-29

Generally speaking, stainless steel is not easy to rust steel, in fact, a part of stainless steel, both rust resistance, and acid resistance (corrosion resistance). The stainless and corrosion resistance of stainless steel is due to the formation of chromium-rich oxide film on its surface. This rust resistance is relative to corrosion resistance. The test shows that the corrosion resistance of steel in weak medium such as atmosphere, water and oxidizing medium such as nitric acid increases with the increase of chromium content in the steel. When the chromium content reaches a certain percentage, the corrosion resistance of steel changes suddenly, that is, from easy to difficult rust, from never corrosion resistance to corrosion resistance. So what is stainless steel and stainless steel building materials are introduced below for everybody how maintain.

Introduction to stainless steel

All metals react with oxygen in the atmosphere to form oxide films on the surface. Unfortunately, the iron oxide formed on ordinary carbon steel continues to oxidize, causing the corrosion to expand and eventually form holes. The surface of carbon steel can be protected by electroplating with paint or with metals that are resistant to oxidation (e.g., zinc, nickel, and chromium), but, as is known, this protection is only a thin film. If the protective layer is broken, the steel below begins to rust.

Chromium is the basic element to make stainless steel corrosion resistance, when the content of chromium in steel reaches 12% or so, chromium and corrosion medium oxygen action, in the steel surface to form a very thin oxide film (self-passivation film), can prevent further corrosion of the steel matrix. In addition to chromium, the commonly used alloying elements are nickel, molybdenum, titanium, niobium, copper, nitrogen, etc., in order to meet the various USES of stainless steel structure and performance requirements.

Stainless steel is usually divided into:

1. Ferrite stainless steel. Contains chromium 12% ~ 30%. The corrosion resistance, toughness and weldability are improved with the increase of chromium content, and the chloride stress corrosion resistance is better than other kinds of stainless steel.

2. Austenitic stainless steel. Contains more than 18% chromium, about 8% nickel and a small amount of molybdenum, titanium, nitrogen and other elements. Comprehensive performance is good, can withstand a variety of medium corrosion.

3, austenite - ferrite duplex stainless steel. It has the advantages of austenite and ferritic stainless steel, and has superplasticity.

4. Martensite stainless steel. High strength, but poor plasticity and weldability.

Ii. History of stainless steel

From 1820 to 1900, very little is known about the progress of stainless steel.

In 1932, hot rolled strip was successfully rolled. Stainless steel flagpole

1934 stainless steel sheet was developed successfully. Stainless steel is a kind of synthetic steel with iron as the main component. It has excellent corrosion resistance and not easy to rust.

In the early 1820s, British scientist Faraday invented the invention, which is the first step of the birth of stainless steel. This is a synthetic steel in which a percentage of the iron is added to enhance the corrosion resistance of the iron and to make it less prone to rust. However, the "stainless steel" of the practical, is in the following decades, after a variety of research by many scientists, improved, just formed today's stainless steel.

Three, the role of stainless steel

Stainless steel shall not corrode, Pitt, rust or wear. Stainless steel is also one of the strongest metal materials used in construction. Due to its excellent corrosion resistance, stainless steel enables structural components to maintain the integrity of the engineering design permanently. Chromium stainless steel also set mechanical strength and high elongation in one, easy to manufacture components, can meet the needs of architects and structural designers of stainless steel plates.

How does stainless steel building materials maintain

1 stainless steel surface dust and easy to remove dirt, available soap, weak detergent or warm water wash.

2. Stainless steel surface of the trademark, the film, with warm water, weak detergent to wash, binder ingredients, using alcohol or organic solvents (ether, benzene) scrub.

3. Grease, oil and lubricating oil on the surface of stainless steel shall be cleaned with a soft cloth, and then cleaned with neutral detergent or ammonia solution or special detergent.

4 stainless steel surface with bleach and a variety of acid attachment, immediately rinse with water, then soak with ammonia solution or neutral carbonic acid water solution, with neutral detergent or warm water wash.

5 stainless steel surface has rainbow grain, is excessive use of detergent or oil caused by, wash with warm water when neutral detergent can be washed.

6 stainless steel surface dirt caused by rust, can be used 10% nitric acid or abrasive detergent washing, also can be used to wash special washing drugs.

A. Maintenance of products

Stainless steel as a building materials processing, must do the surface from processing damage protection. Generally, the stainless steel surface, plastic and other leather film for protection. Manufacturers will be shipped out, also for the purpose of cooperation, and add surface protective film, these skin film can be easily torn off, and the surface of the product will certainly not leave paste traces.

When the final products are bundled, do not tear the protective film as far as possible. For these protected products, it is best to process them on soft benches such as wooden benches.

B. On-site maintenance

When the finished product is transported to the site, it must be packed first. Bales are generally carried out in the workshop, depending on the size, shape, transportation method, etc., and the protective measures such as cardboard, plastic board, etc., may also be used wooden frame, etc.

In terms of delivery, trucks are generally used for direct delivery in order to ensure installation time and to prevent handling damage to the products. In addition, at the installation site, it is also necessary to do the protection of finished products after installation, and the protection of contamination during installation.

The cause of damage at the scene was falling objects from upstairs or sparks from electrical welding. All in all, there are various damage factors depending on the site. So most of the plastic film will be used outside the surface, the side, such as carefully wrapped.