What causes corrosion in sheet metal parts?

Corrosion occurs when environmental conditions trigger a chemical reaction that converts refined metal into its hydroxide, oxide, or sulfide form. In ferrous metals, this process results in rust, while in non-ferrous metals, it causes pitting and the formation of a milky-white film.

How can I design sheet metal parts to prevent corrosion?

To prevent corrosion, design parts to avoid features that trap moisture, dirt, salt, and other grime. Ensure that parts can drain and dry, especially if they will be exposed to liquids or used in humid environments.

What materials are best for preventing corrosion in sheet metal parts?

Materials that perform well in corrosive environments include: Stainless steel, which forms a passive oxidation layer Aluminum, particularly grades 1xxx, 3xxx, and 5xxx Superalloys made with nickel, cobalt, or iron Copper alloys, such as bronze and brass Titanium, which resists corrosion due to its passive oxides

What protective finishes can be applied to sheet metal parts to prevent corrosion?

Several protective finishes can be applied to prevent corrosion, including: Clear Chromate: MIL-DTL-5541 Class 1A Clear Yellow Chromate: MIL-DTL-5541 Class 1A Yellow Clear Zinc: ASTM-B633 Type I FE/ZN 5 SCI Zinc Black Zinc: ASTM-B633 Type II FE/ZN 5 SCI Black Clear Anodize: MIL-A-8625 Type II Class 1 Hard Clear Anodize: MIL-A-8625 Type III Class 1 Passivate: ASTM-A967 Nitric 2 Practice D Electroless Nickel: ASTM-B733 Type IV SCI Class 1 Powder coating Anodizing Wet painting Galvanizing

How can collaborating with a fabricator help in preventing corrosion in sheet metal parts?

Collaborating with a fabricator early in the design process allows for expert input on material selection and anti-corrosion solutions. Fabricators can review designs to identify potential issues and recommend the best practices and materials to ensure corrosion resistance and optimal performance for your specific application.

How to Design Corrosion Resistant Sheet Metal Parts (Updated for 2025)

Finishing, Precision Sheet Metal Fabrication, Sheet Metal Design / 7 minutes of reading / March 29, 2024