Hydrochloric acid (which is also called muriatic acid in its diluted form), as well as phosphoric acid and sulfuric acid may be used in rust removal formulas using strong acids. These are mineral acids, and they are highly corrosive, especially in concentrated forms.
WD-40 can help remove rust from metals like iron, chrome, and stainless steel without further damaging the surface of the metal or removing the paint. The Multi-Use Product is great for loosening and removing excessive surface rust.
White vinegar.
The acetic acid in this common household product is acidic enough to dissolve rust. You can soak smaller things like earrings, wipe it onto a surface with an old cloth, or just pour it directly over rust spots or bolts and screws that have rusted together.
Coca-Cola is carbonated, which allows it to dissolve with metal oxides and break up rust on a variety of metals and alloys. Phosphoric acid also gives it rust-busting power, while citric acid makes it an effective stain remover.
Method: Leave your rusty item in white vinegar submerged fully overnight. Once soaked, remove and scrape the rust with a metal brush or steel wool. For items that cannot be removed and submerged, you can soak a rag in white vinegar and wrap around the rusted area.
CLR – Calcium Lime Rust Remover is Intended for rust stains on metal, concrete and other household surfaces. CLR can be applied either by submersion or surface application. You will typically want to dilute with water for ordinary stains, but it can also be applied full strength for tougher, hard-to-get-out stains.
The vinegar-and-salt mixture needs time to break down the rust. This can take anywhere from one to three days. Check the tool periodically to see if the rust has softened. Once the rust has softened, use a metal brush or steel wool to scrub off the surface.
Rust-Oleum 32 oz. Rust Dissolver Spray (6 Pack) quickly penetrates metal surfaces to dissolve rust. Gel spray will cling to surfaces including the most intricate, detailed objects. The powerful, proprietary formulation makes rust removal easy and transforms surfaces to like-new condition.
To clean old rusty tools with Coke, submerge the tools in a tub or bowl of Coca-Cola overnight (not sure if Diet Coke or Pepsi will work – best to stick with original Coke). If you can still see rust, leave them for a few more days.
Wondering what removes rust without the soaking time? Vinegar and Coke are handy when you don't have a specialist cleaner in the cupboard, but Cif Outdoor Rust Spray is a quicker solution for a range of outdoor surfaces.
If you're wondering how baking soda removes rust; the answer is really simple; just dissolve it in water and scrape off the rust. It's one of the readily available rust removers around and it won't disappoint.
As baffling as it is, aluminum foil is an inexpensive, simple, and stress-free way to remove rust because it chemically dissolves iron oxides by attracting oxygen molecules to itself. This makes it a better option to physically removing rust with scouring powder and steel wools.
Vinegar and Salt
The mixture of salt and vinegar will help soften up rust spots, making it easier for you to scrub the rust off of the surface. To do this job properly, you should gather a towel for cleaning and a towel for drying.
Rust removal with Phosphoric Acid can be carried out by dipping the products into an acid bath, or by lubricating rusty steel surfaces with a specially prepared solution of phosphoric acid. It's best to start with a 30% Phosphoric Acid concentration.
Soak your tool in a vinegar bath.
Place your tool in a jar or other container, then pour in just enough vinegar to submerge all the rusted parts. Soak the tool for 12 to 24 hours, depending on level of rust and type of vinegar used. (Sometimes, even just an hour or two will do for small amounts of rust.)
One of the best chemicals for removing rust is phosphoric acid. Phosphoric acid is a strong acid that reacts with iron oxide (rust) to form iron phosphate, which can be easily removed. It can be found in many commercial rust removal products or can be purchased in a concentrated form and diluted with water for use.
To tackle items with significant corrosion, submerge your rusty tools or knives in a bowl of white vinegar and let them sit overnight or as long as 24 hours.
Mix white vinegar and coarse salt in a large bowl or container until they form a thick paste-like consistency. Spread the mixture onto any rusty surfaces that need treatment and let it sit for around 15 minutes.
Reaction between Vinegar & Rust
Applying vinegar to rust dissolves the oxide and leaves behind a water-soluble salt that you can remove easily. It is called neutralisation, and this reaction happens between rust and acetic acid, which is why cleaning vinegar helps remove iron oxides from household surfaces and objects.
The plastic and glass surfaces on most small kitchen appliances, such as blenders, coffee makers, and toasters, are safe to clean with vinegar, but you want to avoid any rubber parts or metal that vinegar can corrode. This includes stainless steel.