A kitchen sink isn't usually exposed to road salt. It's also probably made with a different grade of stainless steel. (As others have noted, it looks like Tesl

A kitchen sink isn't usually exposed to road salt. It's also probably made with a different grade of stainless steel. (As others have noted, it looks like Tesla intentionally chose a less-resistant alloy for price reasons. This would be consistent with other consumer complaints about their build quality.)