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What are the surface treatment processes for stainless steel coils
source：www.sikali.com.cn | Release time：2025年09月16日1、 Basic treatment: Bottom layer to remove defects
Degreasing: Use cleaning agents/ultrasonic waves to remove oil stains and fingerprints, preparing for subsequent processes, suitable for pre-treatment of all roll materials.
Acid pickling: Dissolving oxidized skin and rust with an acid solution, while forming a passive film to enhance corrosion resistance. It is commonly used for rust removal of hot-rolled or cold-rolled coils.
Passivation: Strengthening the surface passivation film with chemical/electrochemical methods to further prevent corrosion, often combined with acid washing or used for storing coils in humid environments.
2、 Texture/Gloss Treatment: Customize Appearance, Adapt to Scene
1. Glossy type (controlling reflectivity)
No.1 (Hot Rolled Acid Wash Face): Dark and matte, with rolled lines, low cost, used in industrial equipment without appearance requirements (such as storage tanks).
2B (Cold Rolled Matte Surface): Uniform matte, flat, universal base surface, used for home appliance backboards, kitchenware inner layers, or subsequent process substrates.
BA (Cold Rolled Gloss): Soft Gloss, No Oxidation Color, Used for Home Appliance Panels and Decorative Strips that Require a Certain Gloss.
Mirror polishing (8K/10K): Highly reflective (8K clear imaging, 10K near mirror), highly decorative, used for decoration (elevator cars, hotel walls), bathroom hardware.
2. Texture type (texture/functional texture)
Wire drawing: divided into straight lines (anti slip and easy to clean, home appliance panel), random lines (matte surface not dazzling, indoor decoration), spiral lines (customized decorative parts), can cover scratches.
Embossing: Roll out concave and convex patterns (bean pattern anti slip used on stair treads, orange peel pattern decoration used on home appliance shells), with low cost of one-time molding.
Etching: Chemical/laser engraving of patterns (decorative paintings, nameplates, electronic device casings), strong three-dimensional effect and customizable.
3、 Functional processing: Strengthening special abilities
Coating: anti-corrosion (epoxy/polytetrafluoroethylene coating used in chemical equipment), insulation (polyester coating used in electrical enclosures), color (vacuum coating/electrophoresis for colored decorative parts).
Antibacterial: Adding silver/copper ions or ion implantation to inhibit bacteria (antibacterial rate ≥ 99%), used in medical equipment, food contact parts, and public facilities.
Anti fingerprint: Apply a hydrophobic and oil repellent layer to prevent fingerprints from easily rubbing, used in phone frames, home appliance panels, and bathroom hardware.
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