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Passivation Services

We form a thin, inert layer on the material's surface that protects it from environmental factors that could lead to corrosion. Passivation is commonly used in metals like stainless steel and aluminum.

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Custom Parts with Passivation


For stainless steel, passivation involves removing impurities to allow a protective oxide layer to form. Aluminum can be passivated through anodizing, where a stable oxide layer is formed.

The primary benefit of passivation is improved corrosion resistance, which extends the material's lifespan and reduces maintenance costs. Passivation can also enhance the aesthetic appearance of metals, as it helps maintain a clean and smooth surface.

DEK uses advanced techniques, including precise chemical treatments and meticulous processes, to guarantee optimal passivation results. Our dedication to meeting industry standards ensures the reliability and effectiveness of our passivation treatments. Moreover, DEK's customer-centric approach, timely delivery, and competitive pricing make it the top choice for those seeking exceptional passivation services in the CNC machining industry.

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More About Passivation

What’s Passivation?

Passivation involves treating a metal, typically stainless steel or aluminum, with an acid solution to remove impurities and contaminants from its surface. This process promotes the formation of a passive oxide layer, usually chromium oxide, which acts as a protective barrier against corrosion.

During passivation, the metal surface undergoes a chemical reaction with the acid, removing free iron and other foreign materials. The result is a clean surface with a well-formed oxide layer that enhances the material's resistance to corrosion, staining, and other environmental factors.

Advantages of Passivation

  • Corrosion resistance
  • Improved aesthetics
  • Enhanced durability
  • Chemical resistance

Design Considerations for Passivation

  • Material compatibility assessment
  • Environmental conditions evaluation
  • Intended application analysis
  • Adequate cleaning to remove contaminants
  • Selection of suitable passivation methods
  • Regular maintenance for prolonged effectiveness
  • Monitoring for corrosion prevention


Passivation FAQs

Passivation is needed to enhance the corrosion resistance of stainless steel by removing free iron and other contaminants from the surface, forming a protective oxide layer.
Passivated stainless steel typically has a clean, smooth surface. Chemical tests or water-break tests can confirm the presence of a passivated layer.
Passivation is not permanent; the protective oxide layer can degrade over time due to environmental factors. Regular maintenance may be required.
Risks of passivation are minimal when performed correctly, but improper processes can lead to inadequate corrosion resistance or damage to the stainless steel surface.
Passivation colors can vary, but common ones include a silver or metallic appearance. The exact color may depend on the specific passivation process and chemicals used.

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