How to Avoid Corrosion in Stainless Steel Stamping Parts

In 2025, China's new energy vehicle and medical device industries are growing fast. A Sina News report says demand for stainless steel stamping parts in these two industries is up 35% from last year. Stainless steel parts are popular because they resist corrosion. But if you use or process them the wrong way, corrosion still happens. This makes products last shorter. This article talks about easy ways to stop corrosion. It covers material choice, process changes, structural design and post-treatment. It also introduces solutions from Xiamen APOLLO.

 

 

1. Prioritize Corrosion-Resistant Stainless Steel Grades​

Choose 304 stainless steel for most projects. It works especially well for 304 stainless steel punching. 304 stainless steel has 18%-20% chromium and 8%-10% nickel. These elements form a dense oxide film. The film stops corrosion well in wet or chemical environments.​

 

2. Check Material Surface Quality​

Before processing, look at the surface of stainless steel sheets. Don't use sheets with scratches, pits or oil stains. These flaws break the oxide film. Later, corrosion starts easily from these spots.​

 

3. Conduct Pre-Stamping Passivation​

Treat stainless steel sheets with nitric acid before stamping. This makes the oxide film thicker. It also improves the material's ability to resist corrosion. This step is very important for parts used in medical devices.

 

 

1. Control stamping temperature: Keep the temperature below 150℃ when doing stainless steel sheet metal stamping. High temperature breaks the oxide film on the material's surface. Later, the material gets corroded more easily.​

 

2. Optimize mold surface: Use chrome-plated molds. They reduce friction between the mold and the material. Less friction means fewer surface scratches. Scratches usually cause corrosion.​

 

3. Avoid over-stretching: Don't go beyond the material's elongation limit. Over-stretching makes the metal thinner. It also breaks the oxide film. This raises the risk of corrosion.

 

 

Good structural design can cut down corrosion risks a lot. For custom stainless steel stamping, don't design sharp corners or deep grooves. Sharp corners collect moisture and dirt easily. Deep grooves are hard to clean. Both things speed up corrosion. For stainless metal stamping parts used in car undercarriages, add drainage holes. These holes let rainwater flow out fast. Make sure the surface is smooth and has no burrs. Rough surfaces attract corrosive substances. These structural and appearance details not only improve corrosion resistance. They also make products last longer.

 

 

1. Conduct Post-Stamping Passivation​

After stamping, do passivation again on the parts. This fixes the oxide film broken during stamping. It's especially useful for 304 stainless steel punching parts used in food processing machines.​

 

2. Apply Protective Coatings​

For parts used in bad environments (like marine equipment), put a thin layer of epoxy resin coating on them. The coating acts as a barrier. It keeps the part away from corrosive substances. This makes the part last longer.​

 

3. Control Storage and Transportation Environment​

Store stainless steel stamping parts in a dry, well-ventilated warehouse. Don't let them touch carbon steel parts. Carbon steel can cause galvanic corrosion. When transporting, wrap the parts with moisture-proof film.

 

 

Xiamen APOLLO provides high-quality stainless steel stamping products and custom services. They help solve corrosion problems. Our custom stainless steel stamping covers parts for new energy vehicles, medical devices and food machinery. We use 304/316 stainless steel. We also do double passivation-before and after stamping. This keeps the oxide film intact. It greatly improves corrosion resistance.​

 

We have ISO 9001:2015 and IATF 16949 certifications. These certifications make sure we control quality strictly from material selection to production. For stainless steel sheet metal stamping, our precision reaches ±0.01mm. This ensures the surface is smooth and has no burrs. We offer three transport methods: sea, land and air. We use sea transport for large batches to coastal cities. Land transport is for inland areas. Air transport is for urgent orders. This ensures timely delivery. Our engineering team has 18 years of experience. They can design corrosion-resistant structures based on customer needs. This makes our stainless metal stamping parts suitable for different harsh environments. Work with us to get durable, corrosion-resistant stainless steel stamping products.