The corrosion inhibition effect of ceramic molybdenum after the formation of acid salt has also been confirmed by experiments. In terms of resistance to stress corrosion of high-concentration chloride solutions, although molybdenum is used as an alloy element to resist reducing media, pitting corrosion and crevice corrosion of austenitic stainless steel The reason is not fully understood, but a large number of experiments have pointed out that the role of molybdenum is only effective when the steel contains a higher amount of chromium. Molybdenum mainly strengthens the corrosion resistance of chromium in steel. At the same time, molybdenum forms molybdenum acid The buffering effect of salt has also been confirmed by experiments, although this experiment refers to the same Custom Injection Moulding Alumina Ceramic Machinery Parts in terms of resistance to stress corrosion caused by high concentration of chloride. Molybdenum below 3# is harmful to the stress corrosion resistance of austenitic stainless steel, but because common chromium-nickel austenitic stainless steel is mostly used in aqueous media containing trace chlorides and saturated oxygen, its stress corrosion is also originated from pitting corrosion Therefore, chromium-nickel-molybdenum austenitic stainless steel containing molybdenum has higher resistance to pitting corrosion, so in practical applications it often has better resistance to chloride stress corrosion than steel without molybdenum. The development and progress of my country's stainless steel industry is relatively late. Since the founding of the People's Republic of China and before the reform and opening up, the demand for stainless steel in my country is mainly based on cutting-edge use in industry and defense. After the reform and opening up, the rapid development of the national economy Custom Injection Moulding Alumina Ceramic Machinery Parts and the significant improvement of people's living standards have stimulated the demand for stainless steel. After entering the 1990s, my country's stainless steel industry has entered a period of rapid development, and the growth rate of stainless steel demand is much higher than the global level. Since 1990, the global apparent consumption of stainless steel has grown at an average annual rate of 6%. In the 10 years of the 1990s, my country's apparent consumption of stainless steel was 2.9 times the world's average annual growth rate. In the 21st century, my country's stainless steel industry has grown rapidly. From 2000 to 2006, the average annual growth rate of my country's stainless steel consumption was more than 21.17%. Among them, in 2001, my country's apparent consumption of stainless steel reached 2.05 million tons, surpassing the United States to become the world's largest consumer of stainless steel. In 2008, China's apparent consumption of stainless steel reached 6.24 million tons, a year-on-year decrease of 5.17%.
In November 2011, my country's stainless steel production increased by 11.1% to 12.5 million tons. The production of stainless steel products was 336,800 tons, a year-on-year increase of 65.25%. Among them, Guangdong Province is the main production base of my country's stainless steel products. Its output reached 1.837 million tons, an increase of 41.76% year-on-year, accounting for 78.62% of the country's total output.
Stainless steel is the most widely used steel surface treatment method with the best performance-to-price ratio in the world today.
With the implementation of the Western Custom Injection Moulding Alumina Ceramic Machinery Parts Development Strategy, the in-depth development of projects such as West-East Power Transmission, West-East Gas Transmission, South-to-North Water Diversion, Three Gorges Project, Rural Power Grid and Urban Power Grid Second Grid Renovation, my country's hot-dip galvanizing industry has entered a new round of high-speed development stage.
The supply of chromium and nickel in the raw materials of my country's stainless steel industry is oversupply in foreign countries, but in my country is in short supply; stainless steel is overcapacity, oversupply, and profitability fluctuates frequently. With the continuous intensification of competition in the stainless steel industry, mergers and acquisitions and capital operations among large stainless steel manufacturers have become more frequent. Excellent domestic stainless steel manufacturers have paid more and more attention to the research of the industry market, especially the development environment of the company and changes in Custom Injection Moulding Alumina Ceramic Machinery Parts customer demand trends. In-depth study. Because of this, a large number of excellent domestic stainless steel brands have risen rapidly and have gradually become leaders in the stainless steel industry!
How the ceramic develops?
2020 10/26