Introduction to different surface treatments of stainless steel
I. Rolling surface treatment (cold/hot rolling)2B: The most common cold rolling treatment process, through cold rolling, annealing, pickling and finally light rolling to obtain a smooth matte surface Medium reflectivity, suitable for building cladding and industrial equipment The surface roughness Ra value is about 0.1-0.5μm, which has both corrosion resistance and processing convenience 2D: matte cold rolling treatment, less reflective than 2B, more uniform surface Suitable for industrial environments requiring low reflectivity, such as food processing equipment It is often used in engineering structural parts and metal joints BA (bright annealing) : a highly reflective mirror surface formed by annealing in a controlled atmosphere with a surface roughness Ra<0.1μm Suitable for high-end decoration and electronic equipment casing No.1 (fog surface) : after hot rolling, annealing, shot peening and pickling treatment, the surface is discontinuous granular Corrosion resistance is better than polished surface, mostly used in industrial containers 2. mechanical polishing treatmentNo.3 (rough polishing) : use 100-120 mesh abrasive polishing, Ra 0.6-1.2μm Form visible linear lines, suitable for kitchen equipment and medical appliances No.4 (fine polishing) :150-180 mesh belt polishing, Ra 0.2-0.5μm Produces a uniform matte effect, commonly seen in elevator panels and building curtain walls HL (hairline) : continuous unidirectional polishing to form fine parallel lines Both decorative and anti-fingerprint characteristics, mostly used in household appliances panel No.8 (mirror) : Complete mirror effect with Ra<0.1μm is achieved by multi-stage polishing For high-end decoration and optical instruments
