Is stainless steel rust resistant?

Online Answer
In summary, stainless steel does not rust because it is sufficiently reactive to protect itself from further attack by forming a passive corrosion product layer. (Other important metals such as titanium and aluminum also rely on passive film formation for their corrosion resistance.
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What Does Aluminum Corrosion Look Like? Rather than flaking through like rust, aluminum oxide just forms a hard, whitish-colored surface skin.