Corrosion resistant steel

As we all know, corrosion resistant steel is a kind of stainless steel, and its corrosion
resistance is better than stainless steel. It is a steel that resists erosion in certain highly corrosive media. At the current stage of technological development, corrosion resistant steel is one of the most important structural materials. In recent years, the development of corrosion-resistant steel has been closely linked to important sectors of the national economy, including the chemical industry, aircraft manufacturing, atomic power, cryogenic technology, and space development.

At present, the key R&D and application directions of corrosion-resistant steel in China are corrosion resistant steel in the aerospace industry, corrosion resistant steel plate for marine oil tanks, high corrosion resistant weathering steel for railway trains, steel for oil and gas transmission pipes and steel for oil well pipes. Wan Gang, Minister of Science and Technology of China, said that the steel industry is one of the important pillar industries in China.
The transformation and upgrading of the steel industry should be promoted. These include the development of new materials such as steel structures, special steels, and alloy steels.
The development and application of corrosion-resistant steel is the need to build an ecological civilized society and major engineering construction in China. From the perspective of national resource conservation, building an ecological civil society, or from the perspective of downstream industry demand. The development and application of corrosion resistant steels are of great significance. Specifically, the current resources and environmental pressures facing China's economic development are growing. Steel as a basic material is not enough to meet the performance requirements. It also has the corresponding corrosion resistance, weather resistance and wears resistance according to the conditions of use and application environment.  Extending the service life of steel can meet the development direction of high efficiency and greenness advocated by the state. Although from the industry point of view, steel as a recyclable material, the shorter the cycle, the greater the steel demand market, the more favorable to the industry. But from a social point of view, the less steel consumption, the better the
efficiency. If the steel is cycled fast, and even corrosion becomes useless rust, it will be a great waste of social resources. Therefore, from the social point of view, to improve the service life of steel. Although some products may increase certain manufacturing costs. However, it can save resources and energy throughout the life cycle of steel, and it will make a great contribution to society.

On the other hand, the development and application of corrosion-resistant steel can meet the needs of major engineering construction in China. At present, the construction of a series of projects such as petroleum pipelines and marine engineering in China has put forward a demand for corrosion-resistant steel. With the deepening of development, the exploitation of oil and gas resources is becoming more and more difficult, and oil and gas wells with various harsh corrosion conditions appear in large numbers. Although stainless steel and high alloy steel can meet the demand, the cost is high. The development and production of corrosion-resistant low-alloy steels to meet the needs of high-end oil and gas industry and marine engineering steel is the direction that domestic steel companies need to pay attention to and research.

Comments

Post a Comment

Popular posts from this blog

The role of alloying elements (Aluminum(Al), Boron(B), Copper(Cu), Sulfur(S))

Image
Although the alloying elements are very small, they can determine the type and characteristics of the steel that people produce. It can make a difference between steel and steel. Then let's explore the following elements. (1)Aluminum(Al) Aluminum is mainly used to deoxidize and refine grains. In the nitriding steel, a hard and corrosion resistant nitriding a layer is formed. Aluminum can suppress the aging of low carbon steel and improve the toughness of steel at a low temperatures. When the aluminum content is high, the oxidation resistance of the steel and the corrosion resistance in the oxidizing acid and the H2S gas can be improved. And it can improve the electrical and magnetic properties of the steel. Aluminum has a large solid solution strengthening effect in steel, which improve the wear resistance, fatigue strength and core mechanical properties of carburized steel. In the difficult alloy, aluminum and nickel form a compound. Thereby improving the smelting strength. T...
Read more

The role of alloying elements(Chromium(Cr), Nickel(Ni), Molybdenum(Mo))

Image
In order to make better and improve certain properties of steel and to achieve certain special properties. The elements that are intentionally added during the smelting process are called alloying elements. Commonly used alloying elements are chromium, nickel, molybdenum, tungsten, vanadium, titanium, niobium, zirconium, cobalt, silicon, manganese, aluminum, copper, boron, rare earth, etc. Phosphorus, sulfur, nitrogen, etc. also act as alloys in some cases. Let us talk about some of them. (1)Chromium(Cr) Chromium can increase the hardenability of steel and has a secondary hardening effect, which can improve the hardness and wear resistance of carbon steel, so that the steel does not become brittle. When the content exceeds 12%, the steel has good high-temperature oxidation resistance and oxidation resistance, and also increases the thermal strength of the steel. Chromium is the main alloying element of stainless steel acid-resistant steel and heat-resistant steel. Chromium can incr...
Read more

The role of alloying elements (Cobalt(Co), Manganese(Mn), Phosphorus(P), Rare earth (Re))

Image
It is precise because of the variety of elements, and the existence of various forms. Therefore, their role in steel is also variable. Let us finally explore the remaining alloying elements. (1)Cobalt(Co) Cobalt often uses in the special steel and alloy. The cobalt containing high-speed steel has high high-temperature hardness. Simultaneous addition of molybdenum to maraging steel. It can get an ultra high hardness and good overall mechanical properties. In addition, cobalt is also an important alloying element in heat-strength steel and magnetic materials. Cobalt can reduce hardenability of steel. Therefore, adding cobalt alone to carbon steel will reduce the overall mechanical properties after quenching and tempering. Cobalt can strengthen ferrite. Adding to carbon steel can improve the hardness of steel, yield point and tensile strength under an annealed or normalized state. However, it has an adverse effect on the elongation and the reduction of the area, and the impact toughn...
Read more