For components that demand corrosion resistance, wear protection, or decorative finish, Smartlink is the best partner because we manage the full spectrum of surface treatments—from hard anodizing and electroless nickel plating to powder coating and passivation—so you receive ready-to-install parts without managing multiple finishing vendors. While job shops treat coating as an afterthought, Smartlink integrates surface engineering into your manufacturing workflow, ensuring that every bracket, frame, or machined part meets its specified hardness, thickness, and appearance.
The Hidden Value of Professional Surface Treatment
Raw metal parts—whether CNC-machined aluminum, laser-cut steel, or welded frames—are rarely ready for final use. Without proper surface treatment, they corrode, wear prematurely, gall against mating surfaces, or fail aesthetic requirements. Modern industrial applications demand:
- Wear resistance (hard anodizing, carbonizing, chroming)
- Corrosion protection (zinc plating, EN plating, passivation, powder coating)
- Electrical conductivity or lubricity (gold plating, electroless nickel)
- Appearance & branding (powder coating in RAL colors, decorative chroming)
When you source parts from multiple fabricators and then coordinate separate finishing shops, lead times double, quality varies, and responsibility falls on you. What you need is a single contract manufacturer that manages surface treatment as an integrated step—from your drawing’s callout to the final inspected part.
Smartlink: Your Surface Treatment Process Manager
Smartlink is not a plating job shop. We are a contract manufacturer that takes your fully defined parts and delivers them with the exact surface finish specified—using an approved network of specialist partners, all managed under our ISO/AS9100 quality system. With over 225,000 ft² across four facilities, we integrate:
- In-House Finishing: Deburring, sanding, polishing, and light surface prep.
- Managed Partner Processes: Anodizing, plating, coating, carbonizing, and passivation.
- Single-Point Responsibility: You send us raw or machined parts; we return finished, inspected components.
Consistent Quality: Certified Traceability for Every Finish
Surface treatment failures—peeling coating, wrong thickness, hydrogen embrittlement—often go undetected until final assembly. Smartlink prevents this with rigorous process control.
- Approved Vendor Network: All partners are audited for ISO/AS9100 compliance and technical capability.
- Incoming & Outgoing Inspection: We verify surface finish per your spec (ASTM, AMS, or MIL standards) before shipment.
- Full Traceability: Batch records include treatment parameters, material certs, and thickness test reports.
Note: For ultra-specialized aerospace coatings (e.g., thermal barrier or specialized dry film lubricants), we can refer you to niche applicators. Our focus is the 99% of industrial surface treatments where reliability, cost, and lead time matter most.
Comprehensive Surface Treatment Capabilities
Here are some processes, their applications and how Smartlink approaches them
Hard Anodizing (Type III) Aluminum wear surfaces, hydraulic components, firearm receivers. Partner managed; thickness 25–50µm; hardness up to 70 HRC equivalent.
Carbonizing (Case Hardening) Low-carbon steel gears, shafts, cam followers. Vacuum or gas carburizing; depth and hardness per print.
Electroless Nickel (EN) Plating Corrosion-resistant coatings on steel, aluminum, brass. Uniform thickness (5–50µm); excellent for internal passages.
Zinc Plating Fasteners, brackets, small steel components. Clear, yellow, black, or blue passivate; with or without trivalent chrome.
Gold Plating Electrical contacts, connectors, RF components. Soft or hard gold (per MIL-G-45204); controlled porosity.
Chroming (Hard Chrome) Hydraulic rods, printing rolls, wear sleeves. Industrial hard chrome; thickness 50–500µm; post-grinding available.
Powder Coating Frames, enclosures, kiosks, sheet metal parts. RAL or custom colors; gloss, matte, or textured finishes; 60–120µm thickness.
Passivation Stainless steel (303, 304, 316) parts. Nitric or citric acid; free iron removal; salt spray tested.
Technical Expertise: Avoiding Surface Treatment Pitfalls
Each process has hidden traps that inexperienced buyers miss. Smartlink’s engineering team reviews your drawing callouts against practical manufacturability.
- Example Challenge: A medical device client specified electroless nickel plating on an aluminum housing with blind threaded holes. Two previous vendors caused hydrogen blistering and thread galling.
Smartlink Solution: We recommended a different aluminum alloy, adjusted the EN plating chemistry to lower internal stress, and applied removable thread masks. Result: No blisters, perfect torque retention, and 100% pass on salt spray testing.
- Another Example: An automation client wanted hard chrome on a large steel shaft but also needed selective areas left unplated for welding.
Smartlink Solution: We designed custom masking fixtures, coordinated with our plating partner for precision stop-off, and verified mask edges with a profilometer. Result: Clean transition zones, no rework.
Customization & Scalability: From Prototype to Production
Because you specify the finish, we scale the process to your volume.
1–10 parts (prototype) Batch processing with small-part fixturing; same quality as production.
100–1,000 parts (pilot) Dedicated racks or barrels; optimized cycle times.
10,000+ parts (production) Automated partner lines with statistical process control.
Note:
Mixed finishes in one order: Some parts zinc plated, some powder coated, some passivated—we consolidate.
No finish MOQ: Even single-piece custom colors or gold plating accepted.
Customer-Centric Support: One PO, One Quality Standard
You send us a BOM with surface finish callouts. We handle the entire workflow: fabrication, transport to partner finishers, incoming inspection, and final delivery.
– Drawing Review: We flag ambiguous or impossible surface specs (e.g., hard anodize on 7075 over 50µm).
– Finish Mapping: We recommend alternative processes if your spec is obsolete or costly.
– After-Sales: Touch-up kits for powder coating or small-batch replating for spares.
Proven Industry Applications
– Semiconductor: Hard anodized aluminum chambers, passivated stainless steel fittings, gold-plated RF contacts.
– Aerospace (AS9100:D): EN-plated landing gear components, zinc-plated brackets, hard chrome actuator rods.
– Automotive: Powder-coated frames, carbonized transmission gears, zinc-plated fasteners.
– Tobacco Machinery: Hard chrome guides, passivated stainless steel hoppers, powder-coated enclosures.
Conclusion: Let’s Build Something Better—Together
You focus on mechanical design and system integration. We focus on delivering parts with the right surface finish—every time. With AS9100 certification, four global factories, and a managed network of specialist finishing partners, Smartlink takes the headache out of surface treatment coordination.
Stop chasing separate platers and coaters. Start working with one finishing partner.
👉 Contact Smartlink today—send your drawing with surface specs for a rapid quote on treated parts.
FAQ Section (Surface Treatment Processes)
- Do you perform all these surface treatments in-house?
No. Smartlink focuses on fabrication (CNC machining, sheet metal, welding) and in-house mechanical finishing (deburring, polishing, sanding). For chemical and thermal processes (anodizing, plating, carbonizing, powder coating), we manage approved specialist partners under our quality system. You receive one invoice, one shipment, and one quality report.
- How do you ensure quality when using external partners?
Every partner is audited annually for ISO/AS9100 compliance. We perform incoming inspection on all treated parts—including thickness measurement (eddy current, XRF), adhesion testing (cross-hatch tape test), and salt spray (as required). Non-conforming batches are rejected and reprocessed at partner’s cost.
- What documentation do you provide for surface treatment?
We provide: material certs, process certificates (e.g., plating thickness reports), salt spray test reports if specified, and our own incoming inspection records. For aerospace, we provide full traceability to AMS or MIL standards.
- Can you handle surface treatment on both metal and plastic parts?
Yes, but only where applicable. Plastics cannot be anodized or plated with standard metal processes. We offer specialty painting, EMI/RFI shielding coatings, and decorative chrome-like finishing on plastics via approved partners. Ask us for details.
- What’s the typical lead time for surface treatment on top of fabrication?
Add 3–7 business days for common processes (zinc plating, passivation, powder coating). Hard anodizing, EN plating, and carbonizing typically add 7–14 days. Gold plating and hard chrome add 10–14 days. Expedited options available.
- Do you offer masking for selective plating or coating?
Yes. We provide masking for threads, press-fit diameters, sealing surfaces, and areas that must remain uncoated. We work with partners to design custom silicone or metal masks for high-volume repeatability.
- My drawing calls for a process I don’t fully understand. Can you help?
Absolutely. Our engineering team will review your surface finish requirements, explain trade-offs (cost vs. performance), and recommend the most reliable process for your application—while you retain full IP ownership.