Material Selection for Corrosion Resistance in CNC Machining

  • Date:
  • Views:54
  • Source:ZetPart



In the global marketplace for precision CNC machined components, failure is not an option. One of the most common causes of part failure, especially in demanding environments, is corrosion. For businesses relying on durable and reliable parts, from marine and aerospace to chemical processing and medical devices, selecting the right corrosionresistant material is a critical engineering and economic decision. A strategic approach to material selection not only ensures product longevity but also serves as a significant growth driver for manufacturing partners who can expertly guide their clients through this process.


cnc machining bronze
Corrosion resistance is not a onesizefitsall property. It refers to a material's ability to withstand damage caused by oxidizing agents, moisture, salts, or chemicals. The selection process begins with a thorough understanding of the operating environment. Is the part exposed to saltwater spray, high humidity, acidic chemicals, or sterilizing agents? The answers dictate the level of corrosion resistance required.

For moderate environments, anodized aluminum is a popular choice. While aluminum itself forms a protective oxide layer, anodizing artificially thickens this layer, dramatically enhancing corrosion and wear resistance. It remains a costeffective solution for many industrial and consumer applications.

When higher resistance is needed, stainless steels enter the fray. Grade 304 stainless steel offers excellent resistance to a wide range of atmospheres and many organic chemicals. For even more aggressive environments, such as those involving chlorides or acids, Grade 316 stainless steel, with its addition of molybdenum, is the superior choice, preventing pitting and crevice corrosion.

For the most severe conditions, including hightemperature and highly corrosive chemical applications, nickelbased superalloys like Inconel (e.g., 625, 718) and Hastelloy (e.g., C276) are unparalleled. These materials maintain structural integrity in extreme environments but come with higher material and machining costs. Nonmetallic options like PVDF (Polyvinylidene Fluoride) and PEEK (Polyetheretherketone) offer exceptional chemical resistance and are ideal for specific applications where metals are unsuitable.

CNC Machining Services

As a trusted onestopshop for CNC machining services, we empower our clients by demystifying this selection process. Our engineering expertise ensures that you receive a component that is not only precisionmachined but also optimally matched to its operational life, preventing costly failures and recalls. By partnering with us, you leverage deep material science knowledge to enhance your product's reliability, reduce total cost of ownership, and accelerate your time to market. Let us help you build products that are built to last, in any environment.