Many consumers will encounter such doubts after purchasing a stainless steel sink. The advantage of 304 stainless steel is that it does not rust and resist corrosion, but why does the stainless steel sink in my house still rust?
First, the cause of the stainless steel sink rusty
Stainless steel has the ability to resist atmospheric oxidation, ie, stainless, but also has the ability to resist corrosion, ie, corrosion resistance, in media containing acids, alkalis, and salts. However, the corrosion resistance of the steel varies with the chemical composition of the steel itself, the state of addition, the conditions of use, and the type of environmental media. It is based on the surface of the formation of a thin and strong and stable chromium-rich oxide film (passivation film), to prevent further infiltration of oxygen atoms, continue to oxidize, and get the ability to resist corrosion. Once for some reason, the film is constantly destroyed. Oxygen atoms in the air or liquid will continuously infiltrate or the iron atoms in the metal will continue to separate out, forming loose iron oxides, and the metal surface will be continuously rusted.
The water tank itself will not rust. Improper use and maintenance of the tank will cause rust, mold, and other undesirable phenomena on the surface of the tank. The main causes of rust are:
Decoration Impurity: Alkaline water, lime water, oil stains, etc. on the wall of the decoration remain on the surface of the water tank. Failure to clean it in time will cause local corrosion and rust spots.
Iron objects: iron nails, iron wires, and other iron tools are left in the sink for a long time, causing rust and yellow spots on the surface.
Organic juices: Chemicals, cleaning agents, paints, sauces, oils, tea leaves, etc., remain on the surface of the sink for a long time, causing mildew, discoloration, and localized corrosion.
Metal dust: During the renovation, the metal dust in the house with minerals or acids and alkalis falls on the surface of the sink. When it meets the condensation reaction between the humid gas and the stainless steel, the electrochemical reaction causes the formation of yellow spots and rust spots.
Plumbing Impurities: There are iron filings and rusted water in the pipes of the new house decoration. When these impurities stay on the surface of the sink without timely flushing, rust spots and rust spots will appear.
Renovation of construction materials on the surface of the sink: Although stainless steel has corrosion resistance, it is not non-toxic and non-invasive. Experiments have shown that decoration impurities residue water, cement, lime oil, paint, metal dust and so on have a great impact on the surface of the sink.
The effect of chemical products on the surface of the sink: Similarly, the various reagents for painting, cement removal, and the strong oxidants commonly used in the home for cleaning and cleaning are not cleaned in a timely manner if accumulated on the surface of the sink for a long time, and chemical reactions occur with dust and impurities on the surface of the sink. The same can cause corrosion, rust, stains and other undesirable phenomena.
Second, stainless steel sink rust treatment
1. Use toothpaste to remove: squeeze a little toothpaste into the sink and rust or mold spots, and wipe it dry with a dry rag.
2, the use of decontamination powder to clear: use a cloth stained with a little decontamination powder or directly painted on the rust or mold spots repeatedly wipe.
3. Remove with rust-removing cream (agent): Use a dry cloth dipped in a small amount of rust-removing cream or directly spray on the floating rust or mold spots repeatedly and repeatedly.
4. Rinse and clean the surface of the sink: After flushing, rinse the surface of the sink with clean water, and thoroughly clean the surface of the sink with a clean cotton cloth.
5, coated with edible oil for protection: After drying, apply a protective agent or edible oil protection on the surface of the entire sink.
Large area of ​​floating rust, spots, please use scouring pad plus toothpaste overall scrub, according to the lines of the sink scrub, from heavy to light, from fast to slow, must be evenly scrub the surface force, until the rubbing wipe away so far. Wipe with a steel wire ball or other abrasive material to destroy the surface of the sink and make it easier to rust.
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