What benefits can be brought by mirror polishing the flange ball valve ball after hard chrome plating?

The coating of the flange ball valve is reconstructed through the intermetallic compound lattice to form a high-hardness gradient interface layer, and its anti-cutting ability is exponentially improved compared with the base material. In high-frequency reciprocating motion, the contact mode between the micro-protrusions on the coating surface and the sealing pair changes from "hard scraping" to "elastic deformation-dominated sliding", reducing the amount of metal debris generated to less than one-tenth of the original process.

Mirror-grade polishing and low-friction coating constitute a dual-mode drag reduction system. The former reduces viscous resistance by reducing fluid boundary layer disturbances, and the latter improves energy conversion efficiency by suppressing shear heat generation on the solid contact surface. Under high pressure difference conditions, this synergistic effect can reduce the energy consumption of the drive mechanism by about one-third, while controlling the temperature rise of the medium within the critical threshold that does not affect the phase change of the valve body material.

The coating of the flange ball valve triggers a self-repair mechanism after local damage: a micro-electrochemical barrier is formed at the interface between the base metal and the coating, which inhibits the penetration and diffusion of the corrosive medium into the damaged area, and at the same time, the "molecular reconstruction" of the sealing surface is achieved through the regeneration of the surface oxide film. Under extreme pressure cycles, this mechanism can extend the seal failure time by several times, and the leakage rate is always maintained within the zero-level standard allowed by the project.

The mirror surface of the flange ball valve reduces the surface energy, making it difficult for hard particles in the medium to obtain the critical contact force required for embedding. For complex media containing multi-phase solid particles, a particle retention inhibition layer with a "lotus effect" is formed on the surface of the coating, which changes the damage mode of particles on the sealing surface from "ploughing effect" to "rolling friction", thereby significantly extending the operating life of the valve under harsh working conditions.

The outer dense oxide film acts as a quantum barrier for electron tunneling, suppressing the corrosion current density below the metastable threshold of material corrosion; the inner lattice distortion zone blocks the chain propagation path of the electrochemical reaction by capturing free radicals in the corrosive medium. This mechanism reduces the probability of valve failure in extremely corrosive environments to less than one percent of that in conventional processes.