What is the anti-corrosion principle of anti-corrosion coatings?

Anti-corrosion coatings are divided into anti-corrosion coatings that require continuous acid or alkali resistance, alternate acid and alkali resistance, or both acid and alkali resistance and corrosion resistance.

The anti-corrosion principle of anti-corrosion coatings mainly includes the functions of electrochemical principles, chemical principles and physical principles: the electrochemical effect of anti-corrosion coatings, the chemical principles of anti-corrosion coatings, and the physical principles of anti-corrosion coatings

Anti-corrosion coating is a kind of coating coating online coatingol.

Beginning in the 1990s, a new generation of anti-corrosion coating systems gradually occupied the mainstream of market research and application.

At present, China's anti-corrosion coatings are advancing in the direction of high performance, high efficiency, low energy consumption and low pollution.

Anti-corrosion is to use various methods to protect the shielding material from corrosion and oxidation to achieve the purpose of prolonging its service life.

Commonly used good anti-corrosion coatings possess the characteristics

1.

2.

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Principle of Anti-corrosion

1.

The chemical principle of anti-corrosion is to neutralize harmful acid-base substances into neutral and harmless substances to protect the materials in the anti-corrosion coating from corrosive substances

Two, physical principles

The physical principle of anti-corrosion is to isolate the protected material from external corrosive substances with an anti-corrosion coating

Three, electrochemical effect

The electrochemical effect of anti-corrosion refers to the addition of some special substances to the anti-rust paint, so that when moisture and oxygen pass through the anti-rust paint, they will react to form anti-corrosion ions, which will passivate the surface of metals such as steel and prevent metal ions from deteriorating.
Dissolution, to achieve the purpose of anti-corrosion, the most common of this special substance is chromate
.

The application fields of anti-corrosion coatings mainly include the following five aspects

1.
Emerging marine engineering: offshore installations, coastal and bay structures, offshore oil drilling platforms;

2.
Modern transportation: highway guardrails, bridges, boats, containers, trains and railway facilities, automobiles, airport facilities;

3.
Energy industry: hydraulic equipment, water tanks, gas tanks, petroleum refining equipment, petroleum storage equipment (oil pipes, oil tanks), power transmission and transformation equipment, nuclear power, coal mines;

4.
Large industrial enterprises: papermaking equipment, medical equipment, food and chemical equipment, metal container inner and outer walls, chemical, steel, petrochemical plant pipelines, storage tanks, mining and smelting, cement plant equipment, floors with corrosive media, walls, cement components ；

5, municipal facilities: gas pipelines and facilities (gas tank), natural gas pipelines, drinking water facilities, waste disposal and other equipment
.