Anticorrosive coating performance indicators and testing methods, instruments and equipment

1. The introduction
In the field of modern industry, metal equipment and structures are often exposed to harsh environmental conditions such as moisture, chemical erosion, high temperature, etc., which can lead to metal corrosion and damage. In order to protect the equipment and the structure integrity and longevity, anti-corrosion coatings arises at the historic moment. By forming a protective film on the metal surface, anti-corrosion coating plays the role of isolating the external environment from the metal, thus effectively extending the service life of metal materials.

The importance of anti-corrosion coating performance

Anti-corrosion coating is widely used in industrial equipment, building structure and other fields. It can effectively isolate the metal surface from the external environment and prevent the occurrence of chemical reactions such as corrosion and oxidation. In the poor working environment, such as Marine, chemical plants, metal components susceptible to corrosion, so as to affect the performance and service life of equipment. Therefore, it is particularly important to performance test of anti-corrosion coatings.

Anticorrosive coating performance indicators and testing methods, instruments and equipment

2. Background and application of anti-corrosion coatings
Anti-corrosion coatings as an important means of protection, widely used in industrial steel structure, in the field of Marine equipment, petrochemical plant, Bridges, automotive, aerospace and other fields. These equipment and structures often need to face harsh climate, chemical environment and mechanical wear in the process of use, so it is particularly important to choose an anti-corrosion coating with excellent performance.

3. The importance of testing coating performance
The performance of anti-corrosion coatings plays a key role in their effectiveness and reliability in practical applications. Only apply a layer of paint and cannot ensure the long-term protection of equipment and structures, so you need to through performance test to verify the coating quality and suitability. Need to consider the corrosion resistance of coating not only, still need to pay attention to its adhesion, abrasion resistance, high temperature resistance, chemical stability, etc.

In practical applications, the anti-corrosion coatings could face a complicated and changeable environment, such as the Marine environment of corrosive gas in the salt fog, chemical equipment, so the performance of the coating test is more strict and comprehensive. Appropriate performance testing can help manufacturers and users to understand the scope of application, protection and durability of paint, so as to make more informed decisions.

In the next article will focus on discuss anti-corrosion coatings of key performance indicators and the performance of the commonly used detection methods, in order to better understand and evaluate anti-corrosion coatings performance in practical application.

Anticorrosive coating performance indicators and testing methods, instruments and equipment

4. Key performance indicators and testing methods
4.1 Corrosion resistance test

Corrosion resistance is one of the most basic and critical properties of anti-corrosion coatings. Commonly used detection methods, including salt spray test, damp heat test and corrosive gas exposure test. Salt spray test evaluates the corrosion resistance of coatings by simulating salt spray in Marine environment. The corrosion resistance of the coating under high temperature and high humidity was investigated by the wet test. Corrosive gas exposure test simulated conditions of chemical industry, chemical corrosion protective coating the evaluation results.

4.2 Adhesion test

The adhesion of coating refers to the bonding strength between the coating film and the substrate. Scratching, circling and pulling are commonly used adhesion testing methods. The scratching method can evaluate the bonding between the coating and the substrate by cutting the coating surface. Draw a circle on the surface of the film to observe whether the film falls off; The pull method evaluates the bond strength of the coating by applying a tensile force to the coating.

4.3 wear resistance test

In some mechanical wear environments, the wear resistance of coatings is particularly important. Commonly used testing methods include Taber wear test and hanging roller test. Taber wear test simulates the wear of paint in friction by rotating disk and sandpaper. Hanging roller test, simulation of the coating under mechanical friction wear resistance.

4.4 Other performance testing

In addition to the above important properties, there are properties such as high temperature resistance, chemical stability, electrical insulation and other properties to be tested. High temperature resistant performance testing by high temperature exposure test, evaluation of coating stability in high temperature environment; Chemical stability can be assessed by exposure to different chemical media; Electrical insulation performance can be measured by electrical insulation instruments.

Anticorrosive coating performance indicators and testing methods, instruments and equipment

5. Testing equipment and instruments
Anti-corrosion coatings performance testing need to use a variety of professional equipment and instruments, in order to ensure the accuracy and reliability of the test. Common testing equipment includes:

Salt spray test chamber: used to simulate salt spray corrosion in Marine environment and evaluate the corrosion resistance of coatings.

High and low temperature alternating hot and humid boxes, can simulate the extreme conditions of temperature and humidity, evaluate the performance of the coatings in different environment.

Grid cutter and circle cutter: used to evaluate the adhesion between paint and substrate.

Taber wear tester: through the friction of sandpaper, simulate the wear resistance of paint.

Electrical insulation performance tester: used to measure the electrical insulation performance of coatings.

Colorimeter, gloss tester: used to determine the color and gloss of paint.

Tensile testing machine: used to test the tensile strength and adhesion of coatings.

Viscosity meter: used to measure viscosity of coating, coating liquid.

Chemical reagents: used to simulate different chemical environments and evaluate the chemical corrosion resistance of coatings.

Anticorrosive coating performance indicators and testing methods, instruments and equipment

6. Conclusion
The performance testing of anti-corrosion coatings plays a vital role in protecting the reliability and durability of equipment and structures. Through to the coating corrosion resistance, adhesion, abrasion resistance, can be a thorough knowledge of the scope of application and performance of coatings, which will provide a scientific basis for choosing suitable coating. In different application environment, the importance of different performance indicators may also have different, therefore suitable for detection scheme is very important.

In order to ensure the long-term operation and safety of equipment and structures, manufacturers and users need to be fully aware of the testing methods for coating properties so that they can make informed choices. By considering the various performance of paint, you can choose to suit specific application needs of anti-corrosion coatings, so as to guarantee the stable operation of the equipment and structures and prolong service life.

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