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Wire Rod Steel Consumption
- Oct 12, 2017 -

Wire Rod Steel consumption

In recent years, China's crude steel production and steel consumption growth rate much higher than the global average, accounting for a significant increase in the share of the world. China's steel consumption growth, has become the main driving force of global steel consumption.

Since the eighties of last century, Europe and the United States and Japan and South Korea and other developed countries tend to stabilize the demand for steel. And China's planned economy to the market economy changes, the national economy glow with unprecedented vitality, GDP maintained a sustained high growth. Especially since the beginning of the 21st century, China's economic structure has undergone significant changes, urbanization speed, heavy chemical industry characteristics become increasingly obvious, pulling the rapid growth of steel demand.

From 1991 to 2007, China's crude steel consumption increased from 71.51 million tons to 434.95 million tons, with an average annual growth rate of 12%, while the same period, the rest of the world's crude steel consumption growth rate of only 3.8%.

In particular, from 2001 to 2007, the average annual growth rate of China's crude steel consumption was 17.7%, while the growth rate of crude steel consumption in other regions was only 6.7% in the same period, and the steel output increased significantly The China's crude steel production in 1996 ranked first in the world, after 13 consecutive years to maintain the world's first, by 2008, China's crude steel production reached 502 million tons. At the same time, China's steel exports continued to increase, imports fell, in 2006 became a net steel exporting countries.

China's steel exports to the main destination for South Korea, the United States, the European Union and other places. With the continuous development of China's economy, the state vigorously develop the energy industry, long-distance oil and gas pipeline is an important way of energy protection, in the oil (gas) pipeline anti-corrosion construction process, steel pipe surface treatment is to determine the useful life of the pipeline key factors First, it is a combination of corrosion and steel can be a solid combination of the premise. According to the research institutions, the life of the coating depends on the coating type, coating quality and construction environment and other factors, the surface treatment of steel pipe on the life of the coating about 50%, therefore, should be strictly in accordance with the anti- Steel pipe surface requirements, continue to explore and summarize, and constantly improve the surface treatment of steel.

1, cleaning

The use of solvents, emulsions to clean the surface of steel to achieve the removal of oil, grease, dust, lubricants and similar organic matter, but it can not remove the steel surface rust, oxide, welding, etc., so in anti-corrosion production only as an auxiliary means.

2, the tool rust

Mainly use steel wire brush and other tools to polish the steel surface, you can remove loose or tilt of the oxide, rust, welding slag and so on. Manual tool derusting can reach Sa2 level, power tools rust can reach Sa3 level, if the steel surface attached to a solid iron oxide skin, tool rust effect is not ideal, not up to the requirements of anti-corrosion construction of the anchor depth

3, pickling

General use of chemical and electrolytic two methods for pickling treatment, pipeline corrosion only use chemical pickling, you can remove the oxide, rust, the old coating, and sometimes can be used as a blasting after the re-treatment. Chemical cleaning, although the surface can achieve a certain degree of cleanliness and roughness, but the anchor is shallow, and easy to cause pollution to the environment.