The significance of steel pipe corrosion prevention

Steel pipe corrosion problems prevail in the national economy and national defense construction of various sectors, both to the national economy has brought great losses. Also to the production and life caused great difficulties. Steel pipe in natural conditions (atmosphere, natural water, soil) or man-made conditions (acid, alkali, salt and other media), every moment in the corrosion. A spontaneous and unnecessary consumption. The root cause of the steel pipeline is because it is in a thermodynamically unstable state, in the above conditions they have to restore the original relatively stable state. Generation of iron oxides carbonates, etc.. Or transformed into soluble ions.

This process is the metal corrosion process. According to statistics, China's annual steel production of 160 million tons. Each year due to corrosion and loss of more than 6 thousand tons. Almost equal to the annual output of Shanghai Baosteel steel plant. Corrosion is not only a waste of iron and steel resources, but also due to corrosion so that the pipeline, shorten the service life of the equipment to replace the new pipeline equipment costs far more than the price of the metal material itself, the cost of production has increased, reducing the economic benefits Corrosion caused by direct and indirect economic losses is huge. Corrosion products form a scale layer, affecting heat transfer and medium flow rate heat transfer efficiency is reduced, energy consumption is greatly increased, China's annual economic losses due to corrosion up to 280 billion yuan, more than the annual winds, floods, earthquakes, fires and other natural disasters and the sum of more.

Corrosion causes various accidents and major disasters. Due to the corrosion of steel pipelines and equipment, causing production stoppage and product quality decline. Impact on life supply, gas supply, heating steam or hot water, bringing many difficulties to people's lives. Buried oil, gas, water and other pipelines, pipe network leakage, enterprise refining, chemical, chemical fiber, fertilizer, pharmaceutical and other pipelines, equipment, running, bubbling, dripping and leaking. In addition to the loss of a large number of useful substances and cause serious environmental pollution, and even cause fire, explosion, collapse and other catastrophic accidents.

In view of the prevalence of metal corrosion. In order to prevent or slow down the occurrence of metal corrosion. A variety of metal corrosion techniques and technologies should come into being. Metal anti-corrosion new technology, new materials, new equipment to promote the application. Extend the service life of pipelines and equipment, save money and ensure safe production. China's petrochemical, public utilities and other industries. Pipeline perforation due to corrosion up to 20,000 times / year. It mainly occurs in the interface of the steel pipe and the pipe itself bump injury.