Thickness Inspection Standard Of Anti-Corrosion Coating For Steel Structure (Standard And Inspection Of Coating Inspection)

With the wide application of steel structure in construction, bridge, ship and other fields, the importance of anticorrosion coating is getting more and more attention. The main role of anticorrosion coating is to protect steel structure from corrosion and oxidation, and prolong the service life of steel structure. Therefore, it is very necessary to test the thickness of anticorrosion coating.

I. Thickness test standard of anti-corrosion coating for steel structure

1. National Standard

China's national standard "Code for Construction Quality Acceptance of Building Steel Structure Project" (GB50205-2001) stipulates that the thickness of anticorrosion coating of steel structure should meet the design requirements. In the acceptance, the anticorrosive coating should be tested, and the testing method should be in accordance with the relevant standards.

2. Industry standard

The industry standard of building steel structure, "Code for Quality Acceptance of Construction of Building Steel Structure Project" (JGJ81-2002), also stipulates the anti-corrosion coating of steel structure. Among them, the thickness of anticorrosion coating of steel structure should meet the design requirements, and the coating should be even, firm and complete. At the same time, the industry standard also provides detailed regulations on the detection of the coating.

Second, the standards and testing methods of coating detection

1. Coating detection standard

The detection of coating should be in accordance with relevant standards, such as the national standard "Code for Quality Acceptance of Construction of Building Steel Structure Project" (GB50205-2001) and the industry standard "Code for Quality Acceptance of Construction of Building Steel Structure Project" (JGJ81-2002). At the same time, it should also be tested in combination with the characteristics of the coating materials and the use of the environment and other factors.

2. Coating Inspection Methods

There are mainly the following coating detection methods:

(1) Magnetic induction method. Magnetic induction method is a commonly used coating thickness detection method, the principle is to use the magnetic field induction principle to measure the coating thickness.

(2) X-ray method: X-ray method is a non-contact inspection method, which can measure the thickness of non-metallic coatings.

(3) Direct measurement method. The direct measurement method is a simple and easy method to detect the coating thickness by measuring it directly.

III. Conclusion

Thickness detection of anti-corrosion coating of steel structure is an important measure to ensure the service life of steel structure. The coating detection should be in accordance with the relevant standards, and the detection method should be selected according to the factors such as the characteristics of the coating material and the use environment. When the coating detection is carried out, attention should be paid to safety and protection of the environment.