Bridges with reinforced concrete as the main construction material. It only appeared in the second half of the 19th century, but it developed rapidly. For more than one hundred years, reinforced concrete bridges have been widely used, especially in small and medium spans. Zhisheng Weihua Anticorrosive coating Relevant people pointed out that the bridge is not only subject to alternating stress, because it is exposed in the outdoor environment all the year round. It is also potentially affected by many factors, such as concrete neutralization, chloride ion environmental erosion, acid rain corrosion, freeze-thaw effect, microbial corrosion, automobile exhaust pollution, etc. Therefore, it is necessary to take a series of reasonable anti-corrosion maintenance measures, such as ZS inorganic anti-corrosion coating protection, cathodic protection, anti-corrosion reinforcement application, etc., to ensure that the bridge can reach the expected design life. In these measures, anti-corrosion coating The role of is increasingly valued.
Action of reducing concrete resistance After chloride invades the concrete, Cl -, Na and Ca 2 plasma in the concrete will participate in the ionic conduction in the concrete, reducing the surface corrosion of reinforcement Battery The concrete resistance between the cathode and the anode can improve the efficiency of the corrosion battery, thus greatly accelerating the process of "pitting" of steel bars in the concrete and further destroying the "passive film". Therefore, once polluted and corroded by chlorides, the "passive film" on the surface of reinforcement in concrete will be destroyed; A "pit corrosion" is formed, and once this "pit corrosion" is formed, it will be difficult to suppress. When it reaches a certain degree, the reinforcement in the concrete begins to rust. Inorganic anti-corrosion coatings are high-tech anti-corrosion coatings developed to meet the special requirements of aerospace, * * * and other fields. The products have been successfully applied in aerospace, * * * and gradually promoted to various industries of the national economy. Now the inorganic anti-corrosion coating has become the protection of steel cement The most common and important coatings. ZS-711 inorganic anti-corrosive coating has almost no comparable products in the application of atmospheric, underground, marine, petroleum liquids, chemical materials, sewage, transportation and other important anti-corrosion fields. ZS-711 inorganic anti-corrosion coating adopts the world's latest anti-corrosion research and development technology. The solution is a new inorganic chelating film forming solution specially made by Zhisheng Weihua. The film forming material is more dense, with strong adhesion, high temperature resistance, and long-term temperature resistance can reach 400 ℃. Zhisheng ZS-711 inorganic anticorrosive coating, which is formed by inorganic chelating film forming solution and highly activated anticorrosive pigment, can combine with atoms or ions of object surface materials in a rapid reaction to form a physical, chemical and electronic triple protective effect key The ionic bond is firmly bound to the surface of the substrate. It has a good effect on protecting the substrate from physical corrosion, chemical corrosion and electronic corrosion. ZS-711 inorganic anticorrosive coating for Zhisheng Weihua bridge concrete uses activated anticorrosive filler, which can play a role in corrosion resistance enhancement and comparison. It has high acid, alkali and corrosion resistance, which can neutralize and prevent substrate potential from rising, and can also avoid the existence of coating pores. The coating has high hardness, wear resistance, impact resistance, and long acid and alkali aging resistance.
The volume of iron oxide with crystal water is two to ten times of the volume of the steel bar that generates it. The diameter of ordinary reinforcement only needs to be reduced by 100 microns due to corrosion, and the formation of ferric oxide with crystal water can make the concrete protective layer crack and peel along the direction of reinforcement corrosion; Adjacent reinforcement also rusts. When the cracks are connected, the concrete cover will crack as a whole and eventually flake off. Now the bridge concrete is coated with hole sealing transition coating, and inorganic anti-corrosion coating is applied for 5-8 times. Inorganic anti-corrosion? Long term anti-corrosion ， Good corrosion resistance, resistance to humid atmosphere, acid rain, seawater and salt spray corrosion, and high stability to petroleum and petrochemical products and agricultural production system solvents. ZS-711 inorganic anti-corrosion coating independently researched and produced by Beijing Zhisheng Weihua Chemical Co., Ltd. is not only superior to agricultural production system coatings in corrosion resistance, but also has outstanding anti-corrosion advantages compared with common inorganic anti-corrosion coatings, The use effect of corrosion resistance is highly recognized.
