At Mesh Metals, we specialize in delivering comprehensive, tailor-made professional surface finishing solutions for perforated metal sheets and metal plates. Our services are designed to meet the unique demands of diverse application scenarios, material types, and corrosion resistance requirements—helping you enhance the durability, aesthetics, and functional performance of your metal products, whether for indoor, outdoor, industrial, or decorative use.
From cost-effective natural finishes to high-performance fluorocarbon coatings and anodizing, every surface treatment process we offer adheres to strict technical standards, comes with clear quality warranties, and is engineered for targeted applicability. Below, we break down our most popular surface finishing options to help you choose the perfect solution for your project.
1. Natural Finish (No Treatment)
The natural finish is the most straightforward and cost-effective surface treatment option, ideal for projects where the base material’s original appearance is preferred or subsequent processing is planned.
• Processing Flow: After punching, the perforated metal sheet undergoes only simple deburring and slag cleaning to preserve the base material’s original surface.
• Core Characteristics: Lowest processing cost, shortest production cycle, and no additional value-added fees—making it a budget-friendly choice for simple applications.
• Applicable Base Materials: Suitable for all metal materials, with priority given to carbon steel, stainless steel, and aluminum sheets where a natural appearance is desired.
• Applicable Scenarios: Indoor dry environments, temporary use cases, and orders where customers plan to perform their own subsequent surface processing.
2. Pickling and Phosphatization
Pickling and phosphatization is a critical pre-treatment process that prepares metal surfaces for subsequent coatings (such as spraying or galvanizing), ensuring better adhesion and long-term performance.
• Processing Flow: Degreasing → Pickling (removal of rust and oxide scale) → Phosphatization (formation of a phosphatizing film) → Drying.
• Core Technical Parameters: Phosphatizing film thickness ranges from 5-20μm, with a uniform layer and strong adhesion to the base material.
• Core Function: Removes surface impurities from the metal sheet, improves the adhesion of subsequent spray coatings, galvanized layers, or zinc layers, and prevents coating peeling and zinc layer blistering.
• Applicable Base Materials: Carbon steel, stainless steel, and galvanized sheets—especially those with rust or oxidation after stamping.
3. Galvanizing (Hot-Dip & Electro-Galvanizing)
Galvanizing is a popular anti-corrosion surface treatment that applies a protective zinc layer to metal sheets, extending their service life in harsh environments. We offer two primary galvanizing options to suit different needs and budgets.
Hot-Dip Galvanizing
• Processing Flow: Pickling and phosphatization → High-temperature hot-dip galvanizing (approximately 450℃) → Cooling → Passivation → Drying.
• Core Technical Parameters: Zinc layer thickness ranges from 80-200μm (thicker sheets can exceed 200μm), with a salt spray test rating of ≥500 hours—ensuring excellent corrosion resistance.
• Core Characteristics: Thick zinc layer, strong adhesion, superior corrosion resistance, and excellent weather resistance—making it ideal for long-term outdoor use.
• Quality Assurance: We provide a 5-10 year outdoor warranty for international trade orders.
• Applicable Base Materials: Primarily carbon steel; aluminum sheets and stainless steel are generally not suitable for hot-dip galvanizing.
Electro-Galvanizing (Cold Galvanizing)
• Processing Flow: Pickling and phosphatization → Electroplating in a plating tank → Passivation → Drying.
• Core Technical Parameters: Zinc layer thickness ranges from 10-30μm, with a smooth, flat surface and a salt spray test rating of ≥200 hours.
• Core Characteristics: Lower processing cost, attractive surface appearance, and moderate corrosion resistance—perfect for indoor low-corrosion environments.
• Quality Assurance: We provide a 1-3 year indoor warranty for international trade orders.
4. Powder Coating
Powder coating is an environmentally friendly, versatile surface treatment that combines decoration and anti-corrosion, available in a wide range of colors and gloss levels to match any design vision.
• Processing Flow: Pickling and phosphatization → Electrostatic powder coating → High-temperature curing (180-200℃) → Cooling.
• Core Technical Parameters: Coating thickness ranges from 60-120μm, adhesion rating of ≥0 grade (cross-hatch test), salt spray test rating of ≥300 hours, and strong scratch resistance.
• Color & Gloss Options: Standard colors include black, white, gray, blue, red, and yellow; custom colors are available based on customer-provided Pantone color numbers. Gloss options include matte, semi-matte, and bright.
• Core Characteristics: Rich color selection, integrated decoration and anti-corrosion, formaldehyde-free, and environmentally friendly—meeting European and American ROHS standards.
• Quality Assurance: We provide a 3-5 year outdoor warranty and 5-8 year indoor warranty for international trade orders.
• Applicable Base Materials: Carbon steel, galvanized sheets, aluminum sheets, and a small number of customized stainless steel products.
5. Fluorocarbon Coating
Fluorocarbon coating (PVDF) is a high-performance surface treatment designed for extreme durability, making it the top choice for building curtain walls and long-term outdoor applications.
• Processing Flow: Pickling and phosphatization → Primer application → Fluorocarbon topcoat (1-2 coats) → Clear coat → High-temperature curing.
• Core Technical Parameters: Total coating thickness ranges from 80-200μm, fluorocarbon content ≥70%, salt spray test rating of ≥1000 hours, and excellent UV resistance, fade resistance, and chalking resistance.
• Color Options: Customizable based on Pantone color numbers, with a focus on matte and semi-matte finishes—ideal for building curtain wall designs.
• Core Characteristics: Superior weather resistance, high wear resistance, suitable for long-term outdoor use, and an extended coating service life.
• Quality Assurance: We provide an outdoor warranty of more than 15 years for international trade orders.
• Applicable Base Materials: Aluminum sheets, carbon steel, stainless steel—with priority given to aluminum sheet curtain wall models.
6. Anodizing
Anodizing is a specialized surface treatment for aluminum sheets, creating a protective oxide film that integrates with the base material for enhanced durability and aesthetics.
• Processing Flow: Degreasing → Pickling → Anodizing (formation of oxide film) → Sealing → Dyeing (optional) → Drying.
• Core Technical Parameters: Oxide film thickness ranges from 10-25μm (standard model); hard anodizing can reach 50-100μm. Salt spray test rating of ≥600 hours, with excellent wear and oxidation resistance.
• Color Options: Natural (silver white), black, gold, bronze, and customizable colors for specialized applications.
• Core Characteristics: The oxide film integrates seamlessly with the aluminum sheet, offering strong adhesion (resistant to peeling) and significantly improving the aluminum’s weather resistance and aesthetics.
• Quality Assurance: We provide an 8-10 year outdoor warranty for international trade orders.
• Applicable Base Materials: 1060/3003/5052 aluminum sheets; pure aluminum delivers the best anodizing results.
7. Stainless Steel Polishing
Stainless steel polishing enhances the appearance and functionality of stainless steel perforated sheets, with different polishing finishes tailored to specific industrial and decorative applications.
Brushed Polishing (Hairline Finish)
• Processing Flow: Deburring → Brushing → Cleaning → Drying.
• Core Characteristics: Uniform hairline texture on the surface, matte appearance, easy to clean, and no reflection—ideal for food machinery and industrial equipment.
Mirror Polishing (8K/10K)
• Processing Flow: Rough polishing → Fine polishing → Mirror polishing → Cleaning → Drying.
• Core Characteristics: Mirror-like smooth surface, high reflectivity, and strong aesthetic appeal—perfect for high-end decoration and pharmaceutical equipment.
Matte Polishing
• Core Characteristics: A middle ground between natural finish and brushed finish, with a soft surface and no reflection—suitable for civil decoration projects.
• Core Standard: Food-grade polishing requires no sanitary dead corners, no burrs, and a surface finish of Ra≤0.8μm.
• Applicable Scenarios: Food machinery, pharmaceutical screening equipment, high-end curtain walls, and luxury decoration projects.
8. Passivation
Passivation is a value-added surface treatment specifically for stainless steel perforated sheets, enhancing their corrosion resistance and fingerprint resistance without altering their natural appearance.
• Processing Flow: Pickling → Passivation (formation of a passivation film) → Cleaning → Drying.
• Core Function: Removes surface oxide scale from stainless steel sheets after stamping, improves corrosion resistance and fingerprint resistance, and extends the product’s service life.
• Core Characteristics: Low processing cost, no change to the stainless steel’s natural color, and a complimentary value-added service for stainless steel round hole perforated sheets.
• Applicable Base Materials: 304/316/301 stainless steel; all stainless steel perforated sheets can be passivated.
Choose Mesh Metals for Your Surface Finishing Needs
At Mesh Metals, our surface finishing solutions are engineered to deliver consistent quality, durability, and performance—backed by clear warranties and our commitment to customer satisfaction. Whether you need a cost-effective natural finish or a high-performance fluorocarbon coating, we have the expertise and equipment to meet your project’s unique requirements.
Contact us today to learn more about how our surface finishing services can enhance your perforated metal sheets and metal plates, and let our team help you choose the perfect solution for your application.