When sourcing zinc die cast components, procurement professionals know that the casting itself is only half the value. The surface finish—whether it’s a durable powder coat or a brilliant electroplated layer—determines corrosion resistance, cosmetic appeal, and regulatory compliance. At Stick Industry, we don’t outsource these critical finishing steps. Our vertically integrated powder coating and electroplating lines give your components a competitive edge, all under one quality system.
Why Surface Finish Matters for Zinc Alloy Parts
Zinc die castings are naturally smooth and dimensionally precise, but raw zinc requires a protective or decorative finish to withstand harsh environments, meet brand aesthetics, or achieve specific engineering requirements. A poorly executed finish leads to peeling, corrosion creep, or aesthetic failure—problems procurement teams work hard to avoid. With in-house finishing at Stick Industry, you gain:
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Process accountability: No finger-pointing between a die caster and a third-party plater. We control everything from alloy melt to final packaging.
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Faster lead times: Seamless transition from casting to finishing cuts weeks from your order.
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Consistent quality: Every batch goes through the same calibrated lines and inspection gates.
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Cost efficiency: Eliminating extra logistics, margin stacking, and rework delivers a lower total landed cost.
zinc alloy faucet
Our Zinc Alloy Powder Coating Capabilities
Powder coating provides a thick, uniform, and highly durable finish ideal for architectural hardware, industrial equipment, automotive brackets, and consumer products that face mechanical wear or outdoor exposure.
What Sets Our Powder Coating Apart:
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Automated line with manual touch-up stations: Our conveyorized line applies powder uniformly, while skilled operators handle complex geometries and cosmetic-critical areas.
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Wide formulation range: We stock a broad palette of epoxy, polyester, and epoxy-polyester hybrid powders, available in any RAL color, matte to high-gloss, and special textures including wrinkle, hammer tone, and sandtex.
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Precision film thickness: We routinely achieve coating thicknesses from 40 µm to 120 µm, controlled to ±10 µm, ensuring edge coverage on zinc substrates without runs or sags.
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Pretreatment expertise: Zinc surfaces receive a multi-stage cleaning and phosphate or conversion coating pretreatment to maximize adhesion and eliminate under-film corrosion.
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Testing and verification: Every qualified finish undergoes cross-hatch adhesion (ISO 2409), impact resistance (ASTM D2794), mandrel bend, and salt spray testing (ASTM B117) up to 1,000 hours, as required by your specification.
Powder Coating Applications We Support:
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Door handles, hinges, and lock escutcheons for architectural projects
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Automotive seat belt and structural brackets
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Industrial motor housings and pump covers
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Outdoor lighting and smart city infrastructure components
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Powder Coating
Powder Coating
Our Zinc Alloy Electroplating Capabilities
Electroplating remains the premium finish for zinc die castings in sanitaryware, luxury lock sets, automotive interior trim, and consumer electronics. Stick Industry operates advanced automatic plating lines designed specifically for zinc alloy substrates.
Plating Finishes We Offer on Zinc:
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Bright and satin nickel: Single-layer and duplex nickel for corrosion protection and decorative luster.
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Decorative chrome: Nickel-chrome and copper-nickel-chrome systems that meet automotive OEM and plumbing industry corrosion standards.
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Gold, brass, and antique finishes: PVD or electroplated variations for luxury decorative hardware.
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Functional zinc plating: Clear, yellow, and black passivates for fasteners and internal components requiring sacrificial protection.
Our Electroplating Advantage:
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Zinc-optimized pretreatment: Zinc alloy contains aluminum, which can cause adhesion failures if not properly treated. Our proprietary alkaline cleaning, acid activation, and copper strike processes ensure 100% adhesion on every part.
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Automatic rack and barrel lines: We match the plating method to your part geometry and volume, whether it’s a large lever handle requiring uniform chrome on visible surfaces, or thousands of small lock pins in barrel plating.
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Thickness and corrosion compliance: Our nickel deposits regularly range from 5 µm to 25 µm, and chrome from 0.1 µm to 1.0 µm, verified by X-ray fluorescence (XRF) and coulometric measurement. We can certify to ASTM B456, ISO 1456, and specific OEM standards.
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Environmental responsibility: Our plating facility operates a closed-loop wastewater treatment system and complies with EU REACH and RoHS requirements, including trivalent chrome options.
The Vertical Integration Difference
Stick Industry is not a job shop. We are a full-service zinc and aluminum die casting manufacturer with integrated finishing capabilities, located in Xiamen, China, and Hanoi, Vietnam. This vertical integration means:
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One partner, one PO: From alloy procurement and die casting to polishing, plating, or powder coating, and final quality inspection, your supply chain is simplified to a single purchase order.
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In-house laboratory: We verify chemical composition, coating thickness, adhesion, corrosion resistance, and dimensional accuracy under our own roof, issuing full inspection reports with every shipment.
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Global certifications: Our operations are ISO 9001 and CE certified, and our zinc alloy production meets German, Japanese, European, and American quality standards. We serve demanding customers in automotive, sanitaryware, lock and hardware, medical, and industrial sectors.
Your Finishing Specification, Our Commitment
Whether you require a 720-hour neutral salt spray rating on a satin nickel faucet body, a custom RAL powder coat on a batch of lever handles, or a bright chrome finish that matches your brand’s exact reflectivity standard, Stick Industry has the process control and engineering expertise to deliver, batch after batch.
Looking for a reliable source for finished zinc die cast components? Contact our engineering STICK IDNUSTRY team today to discuss your next project and receive a competitive proposal that includes casting, finishing, and full quality documentation.