Stainless Steel is a material that would not typically rust. Unless it is exposed to harsh chemicals or if some residue is left on the stainless steel sink. If you happen to see some rust on your stainless steel sink, it does not mean that your sink is fake or that the materials used to produce your sink is bad.
If you happen to experience rust showing on your sink. It means that the surface of your sink is contaminated. You will need to clean off the chemical or any residue left on your sink. You can easily use a bar keeper’s to clean off the residue sitting on top of your sink. A scouring pad with bar keeper’s will immediately wash of the residue and remove the rust. Make sure you scrub the sink with the directly of the grain to prevent scratching the surface. Your sink would be good as new.