Ceramic kitchen sinks do not rust themselves, but wet kitchenware that has been placed on top of them for a while can leave rust stains. When removing these stains, it is necessary to ensure that the cleaning material is not too tough on the ceramic tiles. There are a couple of safe methods you can use without having to spend too much money on expensive commercial rust removers.
Use Mild Detergent and Rag
If the stain is still fresh, it can be easily removed using mild detergent and a damp rag. Mix some of the detergent in water and soak the rag in the solution. Squeeze off excess water and wipe the rust off the ceramic gently. Rinse the soap residue with water afterwards. If the detergent does not entirely remove the stains from the tiles, move on to the next methods below.
Use Lemon and Salt
Lemon contains citric acid, a weak acidic compound that can remove the stains but does not remove the glossy finish on the top layer of the tiles. First, sprinkle salt on top of the affected surface. Second, squeeze some lemon juice and pour it on top of the salt. Leave the salt and lemon juice for a few hours. Lastly, use a rag to rub the salt and lemon on the stain until it is removed completely. Repeat the process if the stain has not yet been removed. Rinse the salt and lemon juice with water. Wipe the area with a dry cloth.
Vinegar or acetic acid is a much stronger acid than lemon. Use this as an alternative to lemon if the fruit is not available. Do not pour the vinegar directly onto the stain. Soak a small kitchen towel with the acid and place it over the stain. Let the towel sit on top of the affected area overnight. The next day, rub the stain with the towel and rinse it thoroughly with water. Be careful not to rub too much to avoid damaging the protective layer on the tiles. Wipe the affected area with a dry cloth.
Use Rubbing Alcohol
Rubbing alcohol is also safe to use and provides a much faster solution. Simply wet a cotton ball with the solvent and rub it onto the affected area to remove the stain. Be careful not to leave the solvent too long on the ceramic, however. As soon as the stain is removed, rinse the area thoroughly with water. Wipe the area dry with a cloth.
Avoid Muriatic Acid
Muriatic acid is one of the toughest solvents to use when cleaning, so refrain from ever using it to remove rust on top of ceramic kitchen tiles. The solvent can eat away the glossy protective finish and make the tile more susceptible to staining and damage. As much as possible, use natural cleaners that are non-toxic and safe to use. They may require some time to remove the rust, but they are effective nonetheless.