The test results of the bonding strength of high-temperature resistant coatings have many important applications, as follows:
1、 Coating Quality Control and Optimization
Production process control: In the production and manufacturing process of coatings, the bonding strength is tested to determine whether each batch of coating products meets the quality standard requirements. For example, for high-temperature resistant coatings used on the inner walls of industrial furnaces, if the combined strength test results are lower than the specified values, it indicates that there may be process problems with this batch of coatings, such as unreasonable coating parameters, inadequate substrate pretreatment, etc. The production process can be adjusted in a timely manner to ensure the stability of product quality and avoid putting unqualified products into use.
Process optimization basis: By comparing the test results of coating bonding strength prepared under different process parameters (such as different spraying pressures, sintering temperatures, etc.), it is possible to determine which process can make the coating bond more firmly with the substrate, thereby optimizing the existing process. In the preparation of high-temperature resistant coatings for aircraft engine blades, by comparing the bonding strength corresponding to various thermal spraying process parameters, the optimal parameter combination is selected to improve the coating quality and better cope with the harsh working conditions of high temperature and high-speed operation of the engine.
2、 Product performance evaluation and selection
Component performance evaluation: For components coated with high-temperature resistant coatings, the combination of strength test results is one of the key indicators for evaluating their overall performance. For example, high-temperature and wear-resistant coatings are applied to the surface of high-temperature rolling rolls in the metallurgical industry. The strength of the coating directly affects its service life and reliability during high-speed rotation and high-temperature rolling processes. If the bonding strength is insufficient, the coating is prone to peeling off, causing the rolling rolls to lose protection and affecting the performance of the rolling rolls and even the entire rolling production line. The test results can accurately determine whether it can meet the actual production needs.
Coating material selection assistance: When developing or selecting new high-temperature resistant coating materials, testing the bonding strength between different materials and substrate combinations can screen out the most suitable coating materials for specific substrates and application scenarios. For example, when selecting high-temperature resistant coatings for thermal protection systems in spacecraft, it is necessary to test the bonding strength between various ceramic coating materials and the metal substrate of the spacecraft shell. Combined with other performance indicators, a coating material that can still firmly bond with the substrate in extreme high temperature and complex mechanical environments should be selected to ensure the flight safety of the spacecraft.
3、 Failure Analysis and Fault Prevention
Traceability of Failure Causes: When components coated with high-temperature resistant coatings experience coating peeling, cracking, and other failure phenomena during use, the combination of strength test results can help analyze the cause of failure. By comparing the original qualified coating bonding strength data with the residual bonding strength of the failed component coating, it is determined whether the decrease in bonding strength is due to long-term high temperature effects, poor initial coating preparation quality, or abnormal external force impact during use, providing a basis for subsequent improvement measures.
Development of fault prevention measures: Based on the combination of strength test results and analysis of their changing trends, fault prevention measures can be developed in advance. For example, for high-temperature resistant coatings on boiler pipelines that have been exposed to high temperatures for a long time, their bonding strength should be regularly tested. If it is found that the bonding strength is gradually decreasing, preventive measures such as re coating and improving the pipeline operating environment can be taken in advance to avoid pipeline leakage, corrosion and other failures caused by coating failure, and ensure the normal operation of the equipment.
4、 Research and Academic Studies
Theoretical verification and expansion: In the research work of materials science and related fields, researchers verify new coating substrate bonding theories by testing the bonding strength of high-temperature resistant coatings. For example, when exploring the bonding mechanism between new nanocomposite coatings and metal substrates, the results of the bonding strength test can intuitively reflect the correctness of the theoretical model, and also provide practical data support for further expanding and improving related theories.
Development of new materials and methods: Helps to develop new high-temperature resistant coating materials and preparation methods. By comparing the bonding strength of coatings under different innovative materials and processes, we can determine their application prospects and promote the continuous development of high-temperature resistant coatings. For example, in the development of new organic-inorganic composite high-temperature resistant coatings, bonding strength testing is one of the important steps to measure their feasibility.

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