Does Stainless Steel Rust? - LaForce, LLC

Stainless steel is low-maintenance, and its resistance to oxidation and staining makes it an ideal material. However, it is not completely rustproof. Stainless steel contains at least 10.5% chromium, which forms a thin, invisible layer of chromium oxide when exposed to oxygen. Rust can form if this layer is damaged by cleaners, chloride, high humidity, high-salinity environments, or mechanical abrasion. Still, stainless steel is highly corrosion-resistant and will not rust in normal environments.

Types Of Stainless-Steel Corrosion

There are six main types of corrosion:

• General
• Galvanic
• Intergranular
• Pitting
• Crevice
• Stress Corrosion Cracking

General corrosion is considered the safest form because it is predictable, manageable, and often preventable. More localized corrosion, such as pitting and crevice corrosion, is harder to detect since the affected area is smaller, but it can still cause damage. Stress corrosion cracking is also concerning because cracks may not be detected until the application fails.

Common Causes of Rust on Stainless Steel:

Improper cleaning:If dirt is not removed or the surface is not thoroughly rinsed and dried after cleaning, iron in most water can react with oxygen in the air, causing rust.

Scrubbing the surface with steel wool or wire brush:When this process is used to clean stainless steel, particles become embedded on the surface. Rust can form when these particles are exposed to humid air or moisture.

Cleaning chemicals:Cleaning chemicals used on concrete or windows can land on the stainless steel surface and react with air to form rust.

Rust Prevention

Regular maintenance is key to preventing stainless steel rust. The chromium oxide layer makes stainless steel self-healing, but it still needs care. For everyday cleaning, use mild soap or detergent with warm water. Wash the surface with a clean cloth and fresh water, then dry completely. You can also use a special cleaning kit or have the products refinished.

To prevent this from happening in the future, consider these tips:

• Using a different type of finish. It is best to talk with a professional when determining the best finish option.
• For harsh environments, consider using a higher-grade stainless steel.
• During construction or remodeling, leave the product’s original plastic film on, or use something similar until the project is complete.

Our experts are here to help. We can recommend the right type of stainless steel for your environment and budget, and provide cleaning and repair tips. Contact us today!