What kind of metal rust remover is good? The scope of use of rust remover?


Release time:

2019-12-24

Metal corrosion is widespread in production and life, and metal corrosion needs to be used in a timely manner.Rust removerIn addition to this, useRust removerAfter the need to do a good job of rust prevention, so understandmetal rust removerIt can help us save production costs and improve our production efficiency. Know yourself and know your enemy before you can fight a hundred battles. Come and have a look. Here are many types of metals for you.Rust removerMethod of use.

 
There are generally nine kinds of metal rust, as long as the use of appropriate metal rust remover
1. General attack metal rust
Also known as uniform attack corrosion, general attack corrosion is the most common type of corrosion, which is the deterioration of corrosion of the entire exposed surface of the metal through chemical or electrochemical reactions. Eventually, metal corrosion deteriorates into waste material. The amount of metal damaged by general attack corrosion accounts for the largest proportion of the amount of metal damaged by corrosion, but general attack corrosion is still considered safe because it is predictable and often preventable.
2. Local metal corrosion
Unlike general attack corrosion, localized corrosion specifically targets one area of a metal structure. Localized corrosion is generally divided into three categories:
(1) Pitting corrosion: When a small hole or cavity is formed inside the metal, the result of pitting corrosion is usually the passivation of a small area. This area becomes the anode, while the remaining metal part becomes the cathode, thereby producing a local electrical reaction. Deterioration in this small area can penetrate the entire piece of metal and may result in the metal becoming waste material. This form of corrosion is often difficult to detect because it usually occurs in a relatively small area and may be covered and hidden by corrosion-producing compounds.
(2) Crevice corrosion: Similar to pitting corrosion, crevice corrosion occurs at a specific location. This type of corrosion is often associated with the microscopic environment in which it occurs, such as under gaskets, washers, and clamps. Acidic conditions or high levels of oxygen in the crevice can cause crevice corrosion.
(3) Filiform corrosion: When water destroys the coating, the coating or the bottom of the plating surface will cause filiform corrosion. It starts with small defects in the coating and gradually spreads to the whole, resulting in structural defects.
3. Electrochemical metal corrosion
Electrochemical corrosion, unlike general metal corrosion, occurs when two different metals are simultaneously in a corrosive electrolyte. One of the metals becomes the anode and the other metal becomes the cathode, and a galvanic couple occurs between the two metals. The anode, also known as the sacrificial metal, corrodes and deteriorates faster than when it corrodes alone, while the cathode corrosion deteriorates more slowly than otherwise.
Three prerequisites for electrochemical corrosion:
(1) There must be an electrochemical reaction between different metals;
(2) There must be electrical contacts between metals;
(3) The metal must be exposed to the same electrolyte.
4. Environmental corrosion
Environmental corrosion is a complex environmental conditions that affect the corrosion process of metal properties. Chemical, temperature and pressure-related conditions can cause the following types of environmental corrosion:
(1) Stress corrosion cracking (SCC)
(2) Corrosion fatigue
(3) Hydrogen induced cracking
(4) liquid metal embrittlement
5. Flow Assisted Corrosion (FAC)
Flow-assisted corrosion, or flow-accelerated corrosion, further corrodes and deteriorates when the protective layer on the metal surface of the oxide dissolves or is removed by wind or water, and the underlying layer of metal begins to bare.
6. Intergranular corrosion
Intergranular corrosion is a chemical or electrochemical attack that occurs on the grain boundaries of a metal. The reason is that in the interior of the metal, there is often a higher impurity content than near the grain boundaries, making these boundaries more susceptible to corrosion than the internal metal.
7. Dealloying
Dealloying, or selective leaching, is the selective corrosion of specific elements in an alloy. The most common type of dealloying is the dezincification of unstable brasses. The result of corrosion in this case is that the copper material is deteriorated and porous.
8. Friction corrosion
Friction corrosion occurs as a result of repeated friction, contact and/or vibration on a rough surface, which can cause corrosion of pits and grooves on the surface of the material. Friction corrosion usually occurs during mechanical rotation and impact, when assembling bolts and bearings, and when exposed to external vibrating surfaces during transportation.
9. High temperature corrosion
In gas turbines, diesel engines and other machinery used in the fuel containing vanadium or sulfate, in the combustion process, can form a low melting point compounds. These compounds are highly corrosive to metal alloys that are normally both resistant to high temperatures and corrosion, including stainless steel. High temperature corrosion may also be caused by high temperature oxidation, sulfidation and carbonization.
RSB-501 neutral rust remover
For stainless steel, carbon steel, cast iron and other metal parts of the surface of the floating rust, mild rust, oxide, especially suitable for galvanized sheet and aluminum-zinc plate cut rust.
Neutral quality, moderate derusting speed, no damage to the substrate, avoid hydrogen embrittlement, not easy to return to rust; no odor, no waste gas, no harm to the human body; safer for the environment