Em aplicações industriais, os revestimentos desempenham um papel fundamental na proteção de substratos, fornecendo proteção contra corrosão, resistência ao desgaste e embelezamento. No entanto, when these coatings are applied to high temperature environments, how their properties are maintained becomes an important consideration. In order to ensure that the coating can maintain its properties under high temperature conditions, this paper will discuss a method for evaluating such coatings.

Primeiro, the importance of coating
In high temperature environments, such as steel mills, chemical equipment or other thermodynamic systems, coatings need to provide effective protection for steel or other substrates to prevent excessive oxidation, corrosion and thermal fatigue. Selecting and evaluating the appropriate coating is essential to ensure long-term, continuous and effective protection.

2. Details of the evaluation method
1. Faixa de teste
The purpose of this method is to evaluate the heat resistance of coatings used to protect steel surfaces under high temperature conditions. Two test methods are included: Method A is mainly for coatings used internally, while method B is for coatings used externally.

2. Método A: Muffle furnace test
Passos:

Place the sample coated with the material under test into the Muffle furnace.

Select the temperature of the Muffle furnace, which needs to be discussed and agreed by both the buyer and the seller.

Keep heat in medium for 24 horas.

After the heat preservation is finished, one sample is cooled in water and the rest is cooled outside.

The cooled template was subjected to axial bending tests to evaluate its mechanical properties.

Avaliação de desempenho de revestimentos utilizados em altas temperaturas

3. Método B: Temperature rise and fall and environmental exposure test
Passos:

The temperature of the sample coated with the tested material was gradually increased from 205 °C a 425 ° C.

A sample is placed in a salt spray tank for 24 hours to simulate the corrosion environment.

Another sample was exposed to the sun for 12 months to simulate the natural environment.

4. Evaluation and results
After the above two test methods, the sample needs to be examined in detail, mainly focusing on the following points:

Rust condition

Foaming phenomenon

Adhesion decline

Loss of light

Degree of pulverization

3. Application and significance
This test method provides coating manufacturers, equipment manufacturers, and end users with an effective way to evaluate the performance of coatings at high temperatures. Ensuring the high temperature performance of the coating not only helps extend the service life of the equipment, but also reduces maintenance costs and potential downtime.

4. Conclusão
The high temperature environment puts special requirements on the performance of coatings, and the evaluation method described in this paper provides a fast and effective evaluation method for related industries. With the development of technology and the emergence of new materials, the demand and application of high-temperature coatings will continue to grow, so having a scientific and rigorous evaluation method is essential.