AS 1163 hollow sections are widely used in various industries due to their excellent mechanical properties and structural integrity. As a supplier of AS 1163 HOLLOW SECTIONS, I understand the importance of providing high - quality products that meet the diverse needs of our customers. One crucial aspect of enhancing the quality and appearance of these hollow sections is the polishing process. In this blog, I will discuss several suitable polishing methods for AS 1163 hollow sections.
Mechanical Polishing
Mechanical polishing is one of the most commonly used methods for polishing AS 1163 hollow sections. This method involves using abrasive materials to remove surface irregularities and create a smooth finish.
Grinding
Grinding is often the first step in mechanical polishing. Coarse - grit grinding wheels are used to remove large surface defects, such as weld beads or rough edges. For AS 1163 hollow sections, silicon carbide or aluminum oxide grinding wheels are commonly used. These wheels can quickly remove material and bring the surface to a relatively flat state. However, it is important to control the grinding pressure and speed to avoid over - heating the material, which can cause changes in the mechanical properties of the hollow section.
Sanding
After grinding, sanding is carried out to further refine the surface. Sandpaper with different grits is used in a sequential manner, starting from a medium - grit sandpaper and gradually moving to a finer - grit one. For example, starting with 80 - grit sandpaper to remove the scratches left by grinding, then using 120 - grit, 220 - grit, and finally 400 - grit sandpaper for a smoother finish. Sanding can be done by hand for small - scale production or using automated sanding machines for large - scale manufacturing. Automated sanding machines can ensure a more uniform finish and higher efficiency.
Buffing
Buffing is the final step in mechanical polishing. A buffing wheel made of materials such as cotton or felt is used in combination with polishing compounds. The polishing compounds can be in the form of pastes or liquids, and they contain abrasive particles of different sizes. For a high - gloss finish on AS 1163 hollow sections, a fine - grit polishing compound is used. The buffing wheel rotates at a high speed, and the polishing compound is applied to the surface of the hollow section. This process can remove the fine scratches left by sanding and create a shiny, mirror - like finish.
Chemical Polishing
Chemical polishing is another effective method for polishing AS 1163 hollow sections. This method uses chemical solutions to dissolve the surface layer of the material, thereby removing surface defects and achieving a smooth finish.
Acid Polishing
Acid polishing solutions are commonly used for AS 1163 hollow sections. The most common acids used include nitric acid, sulfuric acid, and phosphoric acid. These acids react with the surface of the metal, dissolving the irregularities and leaving a smooth surface. The composition of the acid solution and the polishing time need to be carefully controlled. For example, a mixture of nitric acid and sulfuric acid can be used, with the ratio adjusted according to the specific requirements of the polishing process. Longer polishing times can result in a more polished surface, but excessive exposure to acid can cause pitting or corrosion of the material.
Electropolishing
Electropolishing is an advanced form of chemical polishing. In this process, the AS 1163 hollow section is immersed in an electrolyte solution and connected as the anode, while a cathode is also placed in the solution. When an electric current is applied, metal ions are removed from the surface of the hollow section in a controlled manner. Electropolishing can not only achieve a high - quality, smooth finish but also improve the corrosion resistance of the material. The electrolyte solution used in electropolishing usually contains a combination of acids and additives. The current density, temperature, and polishing time are important parameters that need to be optimized for the best results.
Comparison of Polishing Methods
Each polishing method has its own advantages and disadvantages. Mechanical polishing is relatively simple and can be carried out with basic equipment. It is suitable for small - scale production and can be used to correct large - scale surface defects. However, it is a labor - intensive process and may not be able to achieve a perfectly uniform finish in some cases.
Chemical polishing, on the other hand, can achieve a more uniform and smooth finish, especially electropolishing. It can also improve the corrosion resistance of the AS 1163 hollow sections. But chemical polishing requires the use of hazardous chemicals, which need to be handled with care. The disposal of the chemical waste also needs to comply with environmental regulations.
Applications of Polished AS 1163 Hollow Sections
Polished AS 1163 hollow sections have a wide range of applications. In the construction industry, they are used for architectural structures, such as handrails, facades, and decorative elements. The polished surface can enhance the aesthetic appeal of the building. In the automotive industry, polished hollow sections can be used for exhaust systems or other structural components, where both appearance and corrosion resistance are important.
Conclusion
As a supplier of AS/NZS 1163 HOLLOW SECTIONS, we understand that choosing the right polishing method is crucial for meeting the specific requirements of our customers. Whether it is mechanical polishing for its simplicity and flexibility or chemical polishing for its high - quality finish and corrosion - resistance improvement, we can provide customized solutions. In addition to AS 1163 hollow sections, we also supply EN 10210 S460NLH STEEL HOLLOW SECTION and S355J2H HOT FINISHED HOLLOW SECTION with various polishing options.
If you are interested in our products or have specific polishing requirements for AS 1163 hollow sections, please feel free to contact us for procurement discussions. We are committed to providing you with the highest - quality products and services.
References
- "Metal Finishing Handbook" by Joseph D. Linville
- "Surface Engineering for Corrosion and Wear Resistance" by K. C. Ludema
