What is the rust removal method for rust prevention? What are the methods of rust removal?

Here's how to remove rust:

1. White vinegar rust removal. Vinegar can cause a chemical reaction with the rust on the metal, when the acid penetrates into the rust layer, the inner layer reacts with the innermost oxide or the metal workpiece mixed between the oxide scale, so that the rust layer loses its adhesion and falls off.

2. Remove rust from potatoes and dishwashing detergent. Cut the potatoes and cover the incision with dishwashing detergent. Place the potatoes on metal and let them sit for a few hours to wipe them off.

3. Mechanical rust removal. Abrasive cloth, sandpaper, abrasive paste, wire brush, etc. are fixed to the wheel, and the rusted parts of the metal can be polished and polished when the wheel rotates, and the rust can be removed. Commonly used tools include electric grinding wheels, pneumatic brushes, electric brushes, rust remover guns and needle beam rust removers.

4. Chemical immersion. The chemical reaction between the acid solution and the oxide of iron is used to dissolve and peel off the rust layer on the surface to achieve the purpose of rust removal. Therefore, it is also called "pickling" rust prevention.

It is often used for rust removal of small workpieces and complex shapes. Very efficient. However, there is a slight dissolution loss and hydrogen embrittlement for steel.

5. Use toothpaste to clean. Toothpaste also has a good effect, and the cleaning effect is also very good, and the method is relatively simple, just apply it directly.

The anti-rust method means that the rust removal must have the function of anti-rust at the same time.

There are two ways:

1. After rust removal, the original metal is exposed, and then neutralized and rinsed on the surface for treatment, such as pre-film passivation or paint and oiling. For example, Kagel pickling rust remover is based on this principle.

2. At the same time of rust removal, the rust is not removed, but the rust is reacted into a substance that protects the metal surface from rust. This can be commonly used in the treatment of building steel materials. For example, Kagel rust remover is based on this principle.

The above two methods have their own advantages and disadvantages, and each manufacturer also has many of its own small methods, you can consult.

Alum rust removal method. You can pour about 1 kg of water into the pot, add about 50 grams of alum, boil for 10 minutes, and wipe repeatedly with a brush or rag to remove the rust.

Rust removal of gallbladder gong. After the bile alum (also known as blue alum, sold in chemical reagent stores) is dissolved, it is applied to the rust 1 2 times, and the rust will be removed after about 1 hour.

Paraffin wax derusting. Grind the paraffin wax into fine powder, put it in a bottle, about half a bottle, fill it with gasoline, and put the bottle in a warm place. When the paraffin wax melts, apply this paraffin gasoline mixture to the rusty area, wipe it with a rough rag or paper overnight, and the rust can be wiped off.

Apply another layer of this solution after wiping and it will not rust again for several months to come.

4.Vinegar to remove rust. If there are rust spots in copper products, scrub them with vinegar and clean them immediately. Aluminum products are rusty, can be soaked in vinegar water (the ratio of vinegar and water is determined according to the degree of rust, the heavier the rust or the larger the part, the amount of vinegar should be increased), and then take out and clean, it will be as clean as new.

Precautions for the use of rust remover:

1.This product must be stirred well before use (no diluent added).

2.In order to achieve a better rust removal effect, remove loose floating rust, cracked oxide scale, welding slag, soil, oil and other dirt on the surface of the substrate before soaking or spraying, and then treat it with rust remover. (If there is oil stain, it should be degreased first and then rusted).

3.When soaking and removing rust, if there is sediment at the bottom of the soaking tank, it should be removed in time; When the rust removal ability is reduced, you can add a rust remover with 10% of the liquid volume of the tank as appropriate, and so on repeatedly, without adding water to dilute it.

4.When the rust remover is not in use, seal it with a lid.

5.Do not work in rain or snow.

The commonly used methods of rust removal are physical methods and chemical methods.

Physical rust removal: It is the use of tools or machinery to remove the rusty material on the surface of the metal, also known as polishing and grinding method. This method can only deal with the floating rust and visible rust on the metal surface, but for permeable rust and stubborn rust, physical rust removal is easy to cause residue and easy to return to rust quickly.

Moreover, for the labor cost is high, and the rust removal effect is not very ideal. The most important thing is that physical rust removal is easy to cause dust pollution and does not meet environmental protection requirements!

The best way to remove rust is chemical rust removal: chemical rust removal is to use rust remover to deal with the rust on the metal surface, and some can remove the rust while forming an anti-corrosion layer on the metal surface.

Chemical Rust Removal:

Acid rust remover: the common is strong acid (sulfuric acid, hydrochloric acid, nitric acid, etc.), but the disadvantages are greater, easy to cause excessive corrosion, and have a certain degree of harm to human safety.

Therefore, the current trend is organic acid rust remover, which is easy to meet environmental protection requirements, does not contain strong acid, is fast to remove rust, and is easy to use. ：

It is composed of a variety of surfactants, penetrants, accelerators, organic complexing agents, etc.

It does not produce "hydrogen embrittlement", does not require high-temperature baking and special cleaning, does not cause "excessive corrosion", and has almost no "weightlessness" even if it is soaked in environmental protection rust remover for a long time, which protects the original mechanical properties and processing properties of the steel.

Neutral rust remover: pH is neutral, which can remove floating rust, rust scale, and dissolved metal oxides.

The parts that need to be derusted can be removed without disassembling or grinding. There is no damage to copper, brass, aluminum, plastic, rubber, wood, vinyl and other materials.

Rust conversion agent: completely solve the problem of secondary rust after rust removal and before coating and the problem of secondary corrosion in the short term caused by incomplete rust removal.

After rust removal, the steel parts have a certain degree of rust resistance in a ventilated and dry place.

For the problem of rust, the most suitable method should be selected according to the requirements of rust removal and the nature of the workpiece to be removed!

Removing corrosive substances from metal surfaces is called rust removal, and there are five main methods:

1) Manual rust removal. It is mainly a method to use a hand hammer, shovel, knife, wire brush, and coarse abrasive cloth (paper) to treat the metal surface with rust and meet the requirements of rust removal.

2) Power tool rust removal. Also known as semi-mechanical rust removal, it is mainly a method of using air (electric) brush wheel or various derusting machines to treat the surface with rust and meet the requirements of rust removal.

3) Jet or projectile rust removal (also known as sandblasting rust removal). Mainly with the help of oil-free compressed air (or high-pressure water).

4) Chemical rust removal (also known as pickling rust removal). It is a method that mainly uses inorganic dilute acid solution to brush (spray) and soak the surface of the corroded metal and achieve the purpose of rust removal.

5) Rust remover. It is mainly a method of brushing or soaking on the rusty metal surface with a weakly acidic chemical liquid (i.e., rust remover) to remove the rust on the metal surface through chemical reaction.

According to different metal products and different needs, the most suitable method is the best way to remove rust. 】