Many consumers will encounter such doubts after purchasing stainless steel sinks. The advantage of 304 stainless steel is that it does not rust and resist corrosion, but why does my stainless steel sink still rust?
Stainless steel sink rusting reason
Stainless steel has the ability to resist atmospheric oxidation, that is, rust, and also has the ability to resist corrosion in an acid, alkali, and salt-containing medium, that is, corrosion resistance. However, the degree of corrosion resistance varies with the chemical composition of the steel itself, the state of addition, the conditions of use, and the type of environmental medium. It is a very thin and strong and stable chromium-rich oxide film (passivation film) formed on the surface to prevent the oxygen atoms from continuing to infiltrate and continue to oxidize, thereby obtaining the ability to resist rust. Once for some reason, the film is constantly destroyed, oxygen atoms in the air or liquid will continue to infiltrate or iron atoms in the metal will be continuously separated, forming loose iron oxide, and the metal surface will be continuously rusted.
The sink itself will not rust. Due to improper protection and maintenance, it will cause floating rust and mildew on the surface of the sink. The main causes of rust are:
Decoration impurities: Alkali water, lime water, oil stains, etc. on the wall of the decoration remain on the surface of the water tank. If it is not cleaned in time, local corrosion and rust will be caused.
Iron goods: iron nails, iron wire and other iron tools are left in the sink for a long time, causing surface rust and yellow spots.
Organic juice: Chemical agents, cleaning agents, paints, sauces, oil stains, tea leaves, etc. remain on the surface of the sink for a long time, causing mold, discoloration and local corrosion.
Metal dust: During the decoration, the metal dust with mineral or acid and alkaline in the house falls on the surface of the water tank. When it encounters the condensed water between the humid gas and the stainless steel, the electrochemical reaction forms a yellow spot and rust spots.
Water pipe impurities: There are iron filings and rust water in the water pipes of the new house decoration. When these impurities stay on the surface of the water tank and are not flushed in time, rust spots and rust spots will appear.
The effect of decoration building materials on the surface of the sink: Although stainless steel has corrosion resistance, it is not non-toxic and non-invasive. Experiments prove that the decoration residue residue water, cement, lime oil, paint, metal dust, etc. have a great influence on the surface of the sink.
The influence of chemical products on the surface of the water tank: Similarly, the various paints used for decoration and cleaning, the various reagents for cement removal, and the strong oxidizing agents commonly used in the home, if accumulated for a long time on the surface of the water tank, are not cleaned in time, and chemically react with dust impurities on the surface of the water tank. It can also cause corrosion, rust, stains and other undesirable phenomena.
Stainless steel sink floating rust treatment method
Use toothpaste to remove: Squeeze a little toothpaste and moisten it in the sink with rust or mildew spots, and wipe it repeatedly with a dry rag.
Use decontamination powder to remove: use a cloth dampened with a little detergent powder or apply directly to the floating rust or mildew spots and wipe repeatedly.
Use a descaling cream (agent) to remove: use a dry cloth with a small amount of descaling cream or spray directly on the floating rust or mildew spots and wipe repeatedly.
Rinse and clean the surface of the sink: After removing the rust, rinse the surface of the sink thoroughly with clean water, and then wipe the surface of the water with a clean cotton cloth.
Apply oil to protect: After drying, apply a layer of protective agent or edible oil to the surface of the whole sink.
For larger floating rust and spots, please scrub with scouring pad and toothpaste. Wash it according to the pattern of the sink. From heavy to light, from fast to slow, be sure to wipe the surface evenly until the rust is wiped off. Use a steel ball or other abrasive material to wipe the surface of the sink and make it easier to rust. Source: Yangjiang Daily Jiazhuang
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