Why is my stainless steel grill rusting?

Outdoor grills made of stainless steel are subject to a lot of harsh conditions. These include the weather, heat, chemical cleaning agents and scratches, amongst others, which makes them particularly susceptible to corrosion and spots. Even if the name of the material stainless steel suggests no rust spots, there are not many things not susceptible to destruction. Care and regular maintenance is necessary to increase their service life. Stainless steel grills are an example of this. Depending on the type, strength and surface of the stainless steel, it can become stained with spots of rust or discolour over time.

Weather

Humidity, an excess of moisture and salty air (such as in coastal regions) can cause rust spots on the surface of the grill, as can concentrated bleach and other cleaners containing chlorine.

Chemicals

Concentrated bleach and other cleaners containing chlorine can cause rust spots, which is why they should not be used for stainless steel.

Smoke

Smoke forms while grilling, which can overheat and discolour the stainless steel surface.

High Heat

Grease fires cause the surface of the stainless steel to darken, but do not corrode the material. Regular cleaning of the grilling area and the inside of the grill will reduce the risk of unwanted fire.
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Note: Stainless steel does not ‘rust’ like conventional steel where a red oxide layer forms on the surface and flakes off. If you see rust, it probably originated from particles of iron (e.g. steel wool) that have collected on the surface of the stainless steel. It is these particles that rust and not the stainless steel itself.
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