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Home / News / Knowledge / Metallographic Analysis and Surface Strengthening of Thermal Sprayed Aluminum Alloys

Home / News / Knowledge / Metallographic Analysis and Surface Strengthening of Thermal Sprayed Aluminum Alloys

Metallographic Analysis and Surface Strengthening of Thermal Sprayed Aluminum Alloys

Thermal spraying on aluminum alloys is intended to compensate for shortcomings like low hardness and poor corrosion resistance via surface strengthening, thereby expanding its applications in harsh environments. This process relies heavily on metallographic analysis for quality control and optimization.

Before spraying, metallography is used to evaluate the substrate microstructure, ensuring a sound foundation for bonding. After spraying, it serves as a core method for inspecting coating performance: microscopic observation enables precise analysis of the coating-substrate interface bonding quality, as well as porosity, cracks and phase distribution inside the coating. These microstructures directly determine the coating’s bonding strength, corrosion resistance and wear resistance.

Thus, in-depth metallographic analysis is an indispensable key step for scientifically optimizing processes and ensuring the reliability and service life of coating performance.

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