Passivating Metal Surfaces: Enhance Durability & Corrosion Resistance

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Sino Die Casting: Advanced Surface Treatment Solutions for Global Industries

Founded in 2008 in Shenzhen, China, Sino Die Casting is a high-tech manufacturer specializing in high-precision mold design, die casting, CNC machining, and customized surface treatment services. Our ISO 9001-certified facility integrates advanced technologies to deliver durable, aesthetically superior finishes for components across automotive, new energy, robotics, and telecommunications sectors. With expertise in over 30 surface treatment methods—including powder coating, anodizing, electroplating, and PVD coating—we ensure parts meet stringent industry standards for corrosion resistance, wear resistance, and visual appeal. Whether you require UV-stable finishes for outdoor telecom enclosures, hard-anodized coatings for robotic joints, or conductive plating for automotive electronics, our in-house lab rigorously tests each finish to guarantee performance in harsh environments. Exporting to over 50 countries, we support clients from rapid prototyping to mass production, offering tailo
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Why Sino Die Casting Leads in Surface Treatment Innovation

Sustainable Processes Aligned with Global Standards

Water-based powder coatings reduce VOC emissions by 75%, while closed-loop anodizing systems recycle 90% of process chemicals. Our eco-friendly finishes comply with California Prop 65 and Germany’s Blue Angel certifications, enabling clients to access green markets.

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Sino Die Casting, founded in 2008 in Shenzhen, China, is a high - tech enterprise that excels in passivating metal, a crucial process for enhancing the corrosion resistance and longevity of metal components used in diverse industries including automotive, new energy, robotics, and telecommunications.Passivation is a chemical treatment process that creates a thin, protective oxide layer on the surface of the metal. This oxide layer acts as a barrier, preventing corrosive substances such as moisture, salts, and chemicals from coming into direct contact with the underlying metal. In the automotive industry, where metal components are constantly exposed to harsh environmental conditions, passivation is essential for ensuring the reliability and durability of the vehicle parts. For example, stainless steel components used in the exhaust system or under - body parts need to be passivated to prevent rust and corrosion, which could lead to structural failure and safety issues.Our passivating metal services cover a wide range of metals, including stainless steel, aluminum, and titanium. For stainless steel passivation, we use specialized chemical solutions that remove free iron and other contaminants from the surface of the steel. This promotes the formation of a uniform and dense chromium oxide layer, which is responsible for the stainless steel's corrosion - resistant properties. The passivated stainless steel components can withstand exposure to corrosive environments, such as those found in coastal areas or in the presence of road salts, without rusting or deteriorating.In the new energy sector, passivating metal is crucial for the performance and safety of battery - related components. Many battery enclosures and connectors are made of metals that need to be protected from corrosion to ensure the proper functioning of the battery system. Our passivation processes can create a protective layer on these metal parts, preventing the ingress of moisture and electrolytes, which could cause short - circuits and other electrical problems.For aluminum passivation, we offer anodizing as a passivation method. Anodizing not only improves the corrosion resistance of aluminum but also enhances its surface hardness and wear resistance. This is particularly useful in the robotics industry, where aluminum components are often subject to mechanical stress and friction. The passivated aluminum parts can maintain their performance and appearance over an extended period, reducing the need for frequent replacement.Our state - of - the - art laboratory and experienced technicians ensure that the passivating metal processes are carried out with precision and consistency. We strictly follow ISO 9001 standards to guarantee the quality of our passivated metal components. Whether it's a small batch of custom - made parts or large - scale production, we are committed to providing our clients with high - quality passivated metal solutions that enhance the performance and reliability of their products.

Frequently Asked Questions

What surface treatments do you recommend for outdoor telecom equipment?

For outdoor enclosures, we prioritize polyester powder coating (120–150μm thickness) with UV stabilizers, offering 1,000+ hours of salt spray resistance. For coastal installations, we add a secondary epoxy primer layer to prevent rust.

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Unmatched Durability in Coastal Environments

Sino’s marine-grade powder coating survived 2,500 hours of salt spray testing in our lab, outperforming three European suppliers. Their automated lines also reduced lead times by 3 weeks.

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