Surface Protection Solutions for Industrial Components & Conveyor Chains
Surface treatment is a critical post-processing step in metal component manufacturing, directly impacting corrosion resistance, wear resistance, appearance quality, and service life.
Surface Protection Solutions for Industrial Components & Conveyor Chains
At MaTech, we deeply integrate surface treatment capabilities into our casting, CNC precision machining, heat treatment, and conveyor chain production systems, providing customers with complete manufacturing and surface protection solutions. Based on material type, service environment, and performance requirements, we can match suitable surface treatment processes for steel castings, iron castings, aluminum alloy castings, and conveyor chains. This enhances product reliability and durability under humid, high-wear, corrosive, and heavy-load operating conditions.
Why Choose Matech for Surface Finishing Service?
In industrial component manufacturing, surface treatment not only affects product appearance, but also directly impacts corrosion resistance, wear resistance, and long-term operational reliability. When surface treatment processes are outsourced from multiple suppliers, issues (such as extended logistics time, unclear quality responsibility, uneven coating thickness, and poor adhesion) often arise.
Matech integrates common surface treatment processes within a single quality management system, achieving seamless, coordinated manufacturing from raw material production, precision machining, and heat treatment to final surface protection. Equipped with professional testing equipment—including coating thickness gauges, salt spray chambers, and adhesion testers—we ensure consistent and controllable quality for every batch. By providing your product drawings and performance requirements, our engineering team can develop a tailored surface treatment solution, balancing manufacturability with long-term reliability.
Our Manufacturing Process
Applicable Scenarios
Our surface treatment services are widely applied across the following industries and components:
Our Service Process
From request to delivery, every step is clear and transparent
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At Matech, surface treatment is not merely a post-processing step – it is an integral part of overall manufacturing quality and product reliability. We deeply integrate surface treatment capabilities with casting, CNC precision machining, heat treatment, and conveyor chain production, to provide long-term, stable surface protection solutions for industrial components. Share your drawings or technical requirements and engage with our engineering team for further consultation.
Surface Treatment Capabilities
We divide our surface treatment services into four main areas: pre-treatment capabilities, core process capabilities, testing capabilities, and support services.
| Process | Description | Applicable Scenarios |
| Sandblasting / Shot Blasting | Abrasive particles are propelled by compressed air to remove surface oxides, rust, burrs, and old coatings through impact and cutting action, creating a uniform roughness. Shot peening can also introduce compressive stress to improve fatigue strength. | Surface cleaning and roughening of various metal castings, forgings, and heat-treated components; removes defects and achieves a uniform matte finish. It is a critical pre-treatment to enhance coating adhesion. |
| Chemical Degreasing | Alkaline or acidic cleaning agents are used, combined with ultrasonic or heated soaking, to saponify and emulsify oils, polishing wax, and particulate contaminants for complete removal. | Pre-coating cleaning of precision machined parts, stamped components, and polished parts. Prevents coating defects such as blistering, cloudiness, and poor adhesion caused by residual oils. |
| Pickling / Passivation | Dissolves oxides and surface iron contamination from stainless steel welds; passivation promotes formation of a dense chromium-rich oxide layer. Often performed consecutively to restore a uniform passive surface. | Post-weld treatment and corrosion resistance enhancement for stainless steel assemblies, castings, and machined components. Eliminates weld seam rust risk and meets hygiene standards for food and medical applications. |
| Mechanical Grinding / Polishing | Uses abrasives such as sanding belts or polishing wheels for physical material removal, progressively reducing roughness from coarse grinding to fine polishing, achieving the desired surface finish. | Decorative finishing of metal exterior components, removing mold lines, tool marks, scratches, and achieving brushed or mirror finishes. |
| Process Name | Applicable Materials | Main Function | Typical Coating Thickness / Performance |
| Zinc Plating | Carbon steel, cast iron | Provides cathodic protection to the steel substrate. Even minor scratches in the coating do not cause substrate corrosion. One of the most cost-effective anti-corrosion solutions for steel. | Indoor dry ≥5 μm, standard outdoor ≥12 μm, harsh industrial ≥25 μm. Salt spray test: blue-white zinc ≥96 h, yellow-chromated zinc ≥240 h. Standard: ISO 2081 |
| Hard Chrome Plating | Carbon steel, alloy steel | Achieves high hardness, low friction, and wear-resistant surfaces. Effectively resists adhesive and abrasive wear, significantly extending service life under high-pressure or sliding conditions. | Thickness: 2–10 μm for friction reduction and mild wear; 30–60 μm for adhesive wear protection; 120–250 μm for severe wear/corrosion. Engineering hard chrome typical hardness: 900–1100 HV (~66–70 HRC). Standard: ISO 6158 |
| Electroless Nickel Plating | Steel, copper, aluminum | Provides a highly uniform nickel-phosphorus alloy coating on complex surfaces without electrical current. Offers excellent corrosion and wear resistance; as-plated coating is weldable and can be hardened by post-heat treatment. | Thickness SC1 ≥5 μm (indoor corrosion protection); SC2 ≥13 μm (industrial atmosphere exposure); SC3 ≥25 μm (non-marine outdoor); SC4 ≥75 μm (severe corrosive environments). Standard: ASTM B733 |
| Anodizing (Type II) | Aluminum alloys | Forms a transparent porous oxide layer on the aluminum surface, improving corrosion and wear resistance. Can absorb dyes for various colors, offering good decorative properties. | AA10 (≥10 μm): indoor/outdoor architectural or vehicle parts. AA15 (≥15 μm): outdoor architectural or vehicle parts. AA20 (≥20 μm), AA25 (≥25 μm): parts used in harsh outdoor environments. Standard: GB/T 5237.2 |
| Hard Anodizing (Type III) | Aluminum alloys | Produces a significantly thicker, dense ceramic-like oxide layer than standard anodizing. High hardness, suitable for heavy-load, high-temperature, or electrically insulated aluminum parts; can replace some hard chrome applications. | Thickness: 25–100 μm. Hardness: HV 300–500. Standard: ISO 7599 |
| Dacromet (Zinc-Flake Coating) | Steel, cast iron | Layered zinc-aluminum flake coating providing both barrier and cathodic protection. Superior salt spray resistance compared to traditional zinc plating. Entirely hydrogen-free process, eliminating hydrogen embrittlement risk for high-strength steels. | Thickness 4 μm: salt spray ≥240 h (indoor appliance parts). 5 μm: ≥480 h (indoor/outdoor fasteners). 6 μm: ≥600 h (non-critical automotive chassis parts). 8 μm: ≥720 h (critical automotive chassis fasteners). 10 μm: ≥960 h (marine engineering, port machinery). Standard: ISO 10683 (or ISO 683 as referenced) |
| Powder Coating | Steel, aluminum, cast iron | Electrostatic spraying followed by high-temperature curing forms a uniform organic coating. Offers excellent corrosion resistance, weatherability, and decorative appearance. Solvent-free and environmentally friendly. | Thickness 40 μm: salt spray ≥240 h (indoor doors/windows, partitions, decorative panels). 50 μm: ≥1000 h (outdoor doors/windows, curtain walls, railings). 65 μm: ≥2000 h (curtain walls, high-rise buildings, airport facilities). Standards: AAMA 2603/2604/2605 |
| Black Oxide (Blackening) | Carbon steel, tool steel | Forms a dense black oxide film on the steel surface, providing a uniform matte black appearance. Offers short-term corrosion protection and glare reduction. Cost-effective, minimal dimensional change. | Thickness: 0.5–1.5 μm. Suitable only for mild corrosive environments (limited rust protection). Standard: GB/T 15519 |
| Stainless Steel Passivation | Stainless steel | Completely removes iron contamination and the chromium-depleted layer introduced during machining, promoting formation of a dense, chromium-rich oxide film. Restores or even enhances the inherent corrosion resistance of stainless steel. | Chemical conversion layer; validation by salt spray test 24–72 h. No standard thickness applicable. |
| Inspection Items | Equipment / Process | Acceptance Criteria |
| Film Thickness | Magnetic / Eddy Current Thickness Gauge, X-ray Fluorescence (XRF) | ISO 2360, ISO 2808, customer-specific requirements |
| Adhesion | Cross-Cut Test, Pull-Off Test | ASTM D3359、ISO 2409 |
| Corrosion Resistance | Salt Spray Test | ASTM B117 (as required by customer) |
| Hardness | Microhardness Tester | ISO 4516 |
| Appearance | Visual Inspection, Color Difference Meter, Roughness Tester | Customer-agreed inspection items such as blistering, peeling, color deviation, surface roughness, etc. |
Process Validation & Sample Testing: For new materials, new drawings, or special requirements, sample parts are produced and subjected to a full range of performance tests (including adhesion and salt spray), to validate process feasibility before moving to batch production, thereby reducing trial-and-error costs.
Selective Protection & Masking: Precision masking is applied to non-treatment areas, precision threads, bearing seats, sealing surfaces, and other critical zones. Using high-temperature resistant tape, dedicated fixtures, or peelable coatings, to ensure clear boundaries and no seepage or plating deposition.
Custom Hanging Tool Design: Dedicated hanging tools are designed for irregularly shaped parts or high-volume products, to optimize part orientation and electrical contact points, balancing coating uniformity with production efficiency while minimizing hanging marks and other surface defects.
Environmental Compliance & Documentation: Full compliance with RoHS, REACH, and other environmental regulations, with third-party test reports available from accredited laboratories.
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