Stainless steel is naturally resistant to corrosion. As a noble material, its natural beauty is preserved through maintenance. However, regular cleaning is necessary to maintain its appearance. Therefore, stainless steel can be said to be virtually no different from other building materials such as glass, which also requires regular maintenance.

First, it is important to understand why stainless steel is so resistant to corrosion. Stainless steel has a thin, transparent "passive layer" on its surface.

Even though this protective passive layer is very thin, it has the property of instantly regenerating itself under the influence of oxygen from the air or water. These recommendations are intended solely to advise building professionals on effective and cost-efficient cleaning methods that will allow them to make the most of stainless steel's corrosion resistance. Even after scratches or damage, the regenerated passive layer will continue to protect the surface against corrosion. This is why stainless steel does not require any protective coating to maintain its bright and shiny appearance, even after decades of use.

​

For exterior applications, such as facades, rain is generally sufficient to effectively clean accumulated dust and other deposits, although this varies depending on exposure and height. During routine cleaning, particular attention should be paid to sheltered areas to remove accumulations of airborne contaminants. This is especially important in marine or industrial environments, where accumulations of chlorides or SOx in the air can lead to localized corrosion if not effectively removed.

Grease and oil stains can be removed with solvents, such as white spirit or other solvents like acetone, which will not corrode stainless steel. Always use a soft cloth to avoid scratching.

​

Be careful not to pour the solvent directly onto the stain; it may be difficult to remove completely afterward. It is advisable to apply the product several times with a soft, clean cloth until all traces of dissolved oil and/or grease have disappeared.

Then, using soapy water or a mild detergent is usually effective and safe. Aerosol products are both easy to use and coat the surface with a light film that gives it even more shine. These aerosols remove fingerprints and prevent them from reappearing on surfaces. After applying the product, wipe it off with a dry cloth.

Another solution is to use a stainless steel cleaner containing phosphoric acid, then rinse with demineralized water and dry. It is advisable to treat the entire surface of the component in this way to maintain a perfectly uniform appearance.

​

 

 

Cleaners that should not be used on stainless steel include:

​

• Chlorine-based cleaners, including hydrochloric acid,

• Bleaching products containing bleach (if used accidentally or spilled on stainless steel surfaces, rinse thoroughly with clean water).

• Silverware cleaners.

​

​​Sources Euroinox (The European Stainless Steel Development Association)