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The corrosion prevention mechanism of polyurea products relies on several key aspects: a dense physical barrier. After curing, polyurea forms a continuous, seamless, highly dense elastic coating with almost no pores or gaps, which effectively prevents corrosive agents such as water, oxygen, and acids, bases, and salts from coming into contact with the substrate, thereby blocking the pathways that lead to corrosion at its source. Stable chemically inert structure: Polyurea molecules are formed through an instantaneous reaction between isocyanates and amino compounds; their backbone contains a large number of stable urea bonds, which grant them resistance to chemical erosion. They do not undergo chemical reactions with most corrosive substances such as acids, bases, and oils, ensuring stable performance over time. Excellent adhesion and impermeability: Polyurea exhibits strong bonding strength to common substrates such as metal and concrete, preventing the coating from bulging or peeling off. Together with its extremely low water vapor permeability, it can effectively prevent corrosive agents from penetrating the surface of the substrate over time. Dynamic crack resistance: Polyurea possesses high elongation and impact resistance; when the substrate undergoes slight deformation or cracking, the coating can stretch accordingly without breaking. This avoids the problem of cracking and failure that occurs with traditional brittle anti-corrosion coatings, thus maintaining the integrity of the protective system.