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How to Remove Rust from Large Metal Objects

There are many home remedies on the market to remove rust, but for the industrial manufacturing field, how to remove rust from large metal objects is a troublesome matter and cannot be used with ordinary rust home remedies.

If you want to know what is the fastest way to remove rust from metal? this article will tell you some methods, hoping to help you.

Reasons for metal rusting:

Metal rust is also called metal corrosion. The metal and its environment undergo a chemical or electrochemical process of deterioration. This process will reduce the strength, toughness, etc. of the metal material, causing the metal to rust faster, thereby destroying the use of the metal.

traditional cleaning
traditional cleaning

How to remove rust from large metal objects

Laser rust removal

Laser rust removal uses the characteristics of high energy, high frequency and high power of laser to instantly deposit high energy in a small area and use high temperature to burn the oxide layer, also known as laser cleaning.

continuous laser cleaning machine
Continuous laser cleaning machine
metal derusting laser cleaning machine
Metal derusting laser cleaning machine

Chemical rust removal

Chemical rust removal, also known as pickling, uses chemical reactions to easily remove oxides, rust, debris, etc. from the surface of the substrate.

Commonly used acids that remove rust include sulfuric acid, hydrochloric acid, nitric acid, phosphoric acid, hydrofluoric acid, chromic anhydride, citric acid, oxalic acid, and aminosulfuric acid.

rust removal
rust removal

Electric sanders remove rust from large metal

Start with the coarsest abrasive particles and work your way up to the finer ones to minimize the roughness of the metal. You can use any metal tool to scrape off the rust, but remember to use fine-grained sandpaper later to clean up any traces that may be left during the scraping process.

High pressure water rust removal technology

The new physical rust removal technology adopts the most effective jet method through the specific structure of the metal, and uses the huge energy generated by high-pressure water to impact and continuously and stably impact and clean the workpiece to achieve the purpose of rust removal and cleaning.

High-pressure water rust removal technology is suitable for cleaning metal surfaces in various industrial productions. It has the advantages of no pollution, no corrosion, no damage, high rust removal efficiency, and no need for secondary cleaning during the rust removal process. High-pressure water rust removal technology is divided into There are two forms of pure water medium rust removal and water blast abrasive rust removal.

How to remove rust from aluminum

Alkaline rust removal

The rust of aluminum alloy is mainly an oxide film on the surface, and sometimes there is white powder, also known as white rust. The main method of removal is to remove it in an alkaline chemical solution.

Pickling and rust removal

When acid pickling is used to remove rust from aluminum alloy workpieces, the workpiece must be thoroughly degreased to ensure the quality of rust removal.

How to remove heavy rust from metal

Industrial dilute sulfuric acid or hydrochloric acid is used for rust removal. Since acid will produce hydrogen gas when it encounters it, be sure to avoid fire sources when using it. Moreover, sulfuric acid and hydrochloric acid are corrosive, so labor protection must be taken when using it. , wear gloves and protective clothing.

How to remove rust from tools

For sandpaper rust removal, you need to prepare more coarse sandpaper and fine sandpaper.

  1. Remove dirt or grease from tools.
  2. Once dry, use coarse sandpaper to remove surface rust.
  3. Replace with thinner sandpaper so that the grooves or marks left by the coarser sandpaper can be smoothed out.

If the rust is deep and cannot be removed with sandpaper, you will have to double the rust on the tool through other methods.

Best way of home remedies to remove rust

Try soaking in white vinegar or apple cider vinegar

Soak the rusted item in vinegar, soak it all day and overnight, and scrape off the rust layer with steel wool, scouring pad or wire brush the next day.

Use potatoes

Potatoes contain oxalic acid to help remove built-up layers of rust. Good for smaller items like knives, forks.

Just stick a knife into a potato and let it sit overnight or all day. Take the knife out and wipe the rust clean.

Lemon or lime juice

Lemon or lime juice can remove rust from clothing, and a long soak is effective at removing rust from metal. Or sprinkle some salt on the rusty area, soak it in lemon or lime juice, and scrape it off with a ball of aluminum foil.

Phosphoric acid or hydrochloric acid

Soak the rusted item in phosphoric acid, let it sit overnight, and then allow it to air dry. Scrape off the iron phosphate after the surface has dried. Phosphoric acid is commonly found in cola drinks, Naval Jelly and syrups.

Baking soda

Make a paste by mixing water and baking soda, then use an abrasive object to peel off the rust.

Fizzy Coke

Fill a larger glass container with bubbling Coke, put the rusty things in it, and check if the rust has been removed after half an hour.

Electric grinder or sander

Use the largest, coarsest discs to start grinding away the rust and quickly remove the worst rust.

What metals don’t rust

Non-rusting metals are: gold, silver, platinum, etc.

laser rust removal
laser rust removal

How Can Metal Be Kept from Rusting

Common anti-rust methods mainly include metal coating, organic coating, conversion film, changing the packaging space environment, and temporary anti-rust materials, etc.

Metal coating is a method of preventing metal oxidation by forming a metal film on the metal surface. It mainly includes electroplating, spray coating, vacuum deposition, hot dip coating and electroless plating and other technologies.

Organic coating is to coat a layer of organic material on the metal surface, so as to isolate air and moisture and prevent metal corrosion. It mainly includes methods such as brushing, spraying, electrostatic spraying and electrophoresis.

The conversion film is to form a stable compound film on the metal surface through chemical or electrochemical reaction, so as to improve the corrosion resistance of the metal. It mainly includes phosphating, blackening and passivation methods.

Prevent or slow down metal corrosion by changing the environmental conditions of the packaging space. The main methods are dry air, nitrogen filling and vacuum.

rust removal with laser
rust removal with laser

Temporary antirust materials refer to materials that coat or coat metal surfaces with a layer that can temporarily protect metals from corrosion. Temporary anti-rust materials do not refer to the length of the anti-rust period, but a type of anti-rust material that can be easily removed when necessary. It mainly includes water-based antirust agent, antirust grease and VCI gas phase antirust material, etc.

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