The polishing treatment of steel grating is a key process to improve its surface quality and extend its service life, especially suitable for grating products made of stainless steel, aluminum alloy and other materials. This process not only enhances the aesthetics of the grille, but also improves its corrosion resistance by reducing surface defects.
Surface pretreatment before polishing is crucial. Thoroughly remove oil stains, oxide scales, and welding spatters from the surface of the steel grating, which can be achieved through solvent cleaning or mechanical polishing. For hot-dip galvanized steel grating, special attention should be paid to removing zinc nodules and burrs to avoid scratching the surface coating during polishing; Stainless steel grilles should focus on cleaning the oxidation color in the welding area, which can be treated with specialized stainless steel cleaning agents and steel wire brushes. The surface of the pre treated grille should be kept dry and clean, laying the foundation for subsequent polishing.
The selection of polishing tools should be determined based on the grid material and surface requirements. For ordinary carbon steel grilles, steel wire wheels or grinding wheels can be used for rough polishing to remove surface roughness; For stainless steel grilles, it is recommended to use wool wheels combined with stainless steel polishing wax to avoid iron ion pollution caused by carbon steel tools. For steel grilles with fine grids, a small angle grinder or handheld polishing machine should be equipped to facilitate operations in the gaps between the grids. Automated polishing equipment is suitable for mass production of standard specification grids, which can ensure polishing uniformity through program control, while irregular grids require fine processing combined with manual polishing.
The polishing process should follow the gradual principle of “from coarse to fine”. Perform rough polishing treatment, using abrasive with larger particle size to remove surface scratches and welding marks. At this time, the polishing force should be controlled to avoid deformation of the grid due to excessive polishing. After rough polishing, clean the surface debris with a clean cloth, and then perform medium polishing to refine the surface texture. Use fine-grained polishing materials for fine polishing until a mirror or matte effect is achieved. For the welding points and edge wrapping of the grille, it is necessary to focus on handling the burrs at the joints. A conical grinding head can be used for edge polishing to ensure overall flatness.
The protective measures after polishing directly affect the durability of the treatment effect. After polishing the stainless steel grille, a special passivation agent can be applied to form an oxide film on the surface to enhance its corrosion resistance; Galvanized grating should avoid contact with acidic substances to prevent damage to the coating. For steel grilles used in humid environments, polishing can be followed by glazing treatment to enhance surface hydrophobicity. In addition, the dust generated during the polishing process needs to be collected through dust removal equipment, and operators need to wear protective goggles and masks to ensure job safety.
The polishing treatment of steel grating is a delicate process that balances aesthetics and performance. A targeted plan should be developed based on the material characteristics, and the quality of pre-treatment, polishing, and protection should be strictly controlled. The scientifically standardized polishing process not only enhances the visual effect of steel grilles, but also extends their service life under complex working conditions, providing guarantees for the safe and stable operation of industrial facilities.
