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Surface Treatment Services for Sheet Metal Processing | China Suppliers & Factory Solutions
Service scope
Mingli Metal has a deep understanding of the synergy between materials and processes:
Our technical team, with over 300 industry case experience, can help you:
- 1. Precise diagnosis requirements —— Analyze the best solution through 6 dimensions such as salt spray level and conductive requirement
- 2. Avoiding process traps —— Predict 12 common defects such as color difference of aluminum alloy anodizing
- 3. Cost optimization combination —— Recommended cost-effective combinations such as "galvanized base + powder coating"
Service mode
Let professional choice achieve product value
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Mingli engineers will explain to you:
- ✓ Corrosion resistance process matrix under different environments
- ✓ Certification programs for medical, food and other industries
- ✓ Alternative technologies that can save up to 40% per square meter
General Solutions
Function comparison table of surface treatment
| Material category | surface treatment | Core functional purpose | Process characteristics | Typical application scenarios |
| iron plate | spray-paint | Anti-corrosion + colorful decoration | Electrostatic powder coating, film thickness 60-120μm | Cabinet housing/outdoor facilities |
| hot-galvanize | Long-term anti-rust (salt spray 600-1500h) | 450℃ zinc bath coating, thickness ≥80μm | Building steel structure/power transmission tower | |
| electrogalvanizing | Basic rust prevention + electrical conductivity retention | Electrochemical deposition, thickness 5-20μm | Electrical connectors/standard parts | |
| cataphoresis | Complete anti-corrosion for complex parts | Electrodeposition of epoxy resin, film thickness 15-30μm | Automobile chassis/tubular structure | |
| turn black | Short term rust prevention + reduce reflection | The alkaline oxidation generates Fe₃O₄ film with a thickness of 0.5-1.5μm | Instrument internal parts/tools | |
| quench | Surface hardened (HRC 50-65) | High frequency/laser heat treatment, depth 0.2-3mm | Gear/mold working surface | |
| stainless steel | deactivation | Improved corrosion resistance (salt spray doubled) | Nitrogen removes iron ions and forms chromium passivation film | Food machinery/medical equipment |
| wire drawing | Decorative texture + cover scratches | Mechanical polishing forms straight or random lines, Ra0.4-1.6μm | Elevator panel/home appliance appearance parts | |
| electrolytic polishing | Ultra-clean surface (Ra ≤ 0.1μm) + antibacterial | Electrochemical dissolution of bumps and thickening of passivation layer | Pharmaceutical pipeline/semiconductor equipment | |
| Electroplating (gold/copper) | Special functions (conductive/decorative) | Precious metal deposition, thickness 0.1-5μm | Electronic contacts/artistic components | |
| Baking varnish | Special color requirements | After spraying, 180℃ curing is performed to improve the bonding force | Brand logo/Customized equipment panel | |
| Aluminum material | anodic oxidation | Wear-resistant + insulation + multi-color coloring | The electrolyte forms an Al₂O₃ film with a thickness of 5-25μm | Electronic product case / outdoor signage |
| wire drawing | Improved metal finish | In the same stainless steel process, pressure should be controlled to prevent deformation | Furniture panel/consumer electronics | |
| Aluminum material | spray-paint | Low cost corrosion protection | Chromium pretreatment is needed to enhance adhesion | General structural parts/internal components |
| chemical nickel-plating | Improved hardness (HV500) + weldability | Self-catalyzed nickel-phosphorus alloy coating, 10-30μm thick | Precision moving parts/connectors | |
| Copper material | deactivation | Anti-oxidation and discoloration | Benzotriazole film formation | Electrical components/artwork |
| Electroplating (tin/silver) | Enhance weldability or conductivity | The tin layer is 3-10μm thick and the silver layer is 2-6μm thick | PCB terminals/high frequency conductors | |
| chemical stain | Decorative antique bronze/green rust effect | Sulfide or basic copper carbonate reaction | Building decorations/artifacts |
Frequently Asked Questions
How does Mingli Metal ensure the correct selection of surface treatments?
Our technical team leverages experience from over 300 industry cases to diagnose requirements across 6 key dimensions, including salt spray resistance levels, conductivity, and specific environmental exposures.
Can you help avoid common defects like color differences in aluminum anodizing?
Yes. Our engineering team proactively predicts and mitigates 12 common surface treatment defects, including aluminum alloy anodizing color variations, through strict process controls.
Are there cost-optimization options available for my metal projects?
Absolutely. We specialize in recommending high-value, cost-effective process combinations (such as "galvanized base + powder coating") and alternative technologies that can reduce costs by up to 40% per square meter.
What types of environments are covered in your corrosion resistance matrix?
We assess corrosion resistance under various conditions, matching processes like hot-dip galvanizing (offering 600-1500h salt spray resistance) or chemical nickel-plating to meet specific industrial demands.
Do you support specialized industry certifications?
Yes, we provide guidance and surface treatment solutions tailored to the strict compliance and certification standards of the medical, food, and semiconductor industries.