Anti-corrosion steel pipe manufacturer for drainage

Hebei Tianze Information Resources recently learned about the release: microbial corrosion. The bacteria themselves do not necessarily corrode steel, but the microorganisms can be anaerobic or aerobic, and the secretions can form reducing acids that generate electrochemical cells. These microorganisms are bacteria, fungi, algae, etc. There are also ferrocystis mycobacteria and Ferrocobacter gastrointestinalis (genus). We can often see iron tumors formed on valves and bare steel pipes after one or two years of use. After long-term efforts, the anti-corrosion technology of water supply pipelines in my country has made great progress. Paint anti-corrosion and cathodic protection have achieved good results in the anti-corrosion of steel water supply pipes. The key points for selecting internal anti-corrosion materials mainly focus on the following points: (1) New water supply internal anti-corrosion materials based on organic materials. Polyester composite materials and zinc-rich resin anti-corrosion materials have been developed, and the results are relatively good. When corrosion occurs in the pipe network, the problem is often not the anti-corrosion material itself, but the rust removal treatment of the steel pipe body and the process effect of surface rust removal that are difficult to guarantee. Because the local rust bottom of the pipeline develops and expands during use, there are also external factors such as wear and scratches that cause anti-corrosion failure. During construction, coatings that are too thick are prone to delamination under the influence of temperature, and coatings that are too thin are prone to damage and damage, which has long been limited in the anti-corrosion applications of water pipes. Moreover, the anti-corrosion cost of organic materials is relatively high. For example, factory-made powder resin electrostatic high-temperature spraying has a relatively good effect and can be used for internal and external anti-corrosion. However, it has not been popularized due to the high cost and difficulty in processing large-diameter pipes. It is also the process with the best anti-corrosion effect among organic materials currently.
(2) Anti-corrosion of water supply steel pipes based on inorganic materials. Cement mortar lining has good application effect, low price and mature technology, and has been widely used in engineering. Since the H value of the cement mortar is relatively high, a passivation layer is automatically formed on the surface of the steel after the oxidized rust reacts with the cement, effectively protecting the steel. With cement mortar protection, the pipe will not corrode the passivated surface, and the use effect is better. The bad thing is the difference in linear expansion coefficients between steel and cement. Poor quality pipe fittings and cracked cement mortar can lead to adverse consequences. In order to solve this problem, it is better to add a buffer layer, apply a layer of elastic cement mortar on the contact surface with the steel pipe, and then apply ordinary cement mortar. This is the latest coating and anti-corrosion material. However, this scientific research result has not yet been widely used.
(3) External anti-corrosion of pipes. The steel pipe adopts reinforced asphalt anti-corrosion and heavy epoxy coal anti-corrosion, which can basically meet the external anti-corrosion of water supply steel pipes, and is also relatively economical and practical.
(4) Anti-corrosion of building water supply pipelines. A few years ago, galvanized steel pipes were basically used, with only a few high-end buildings using copper pipes and a very small number of stainless steel pipes. There are few other corrosion protection practices for small diameter pipes.
(5) The shining point in the development of pipeline anti-corrosion: the development of nanomaterials. Nanotechnology may bring new hope for pipeline anti-corrosion.