Aluminum alloy is widely used in industrial applications, as a non-ferrous metal structural material, it is widely used in industries such as aerospace, machinery, automobiles, and ships. The research and application needs of aluminum alloy materials are constantly developing, and metallographic analysis, as one of the important means and steps for material testing, has also become more in-depth. Pulse detection metallographic engineers will quickly grasp the experience of preparing aluminum alloy samples using alumina polishing solution and share it with friends, providing reference for improving our work quality and efficiency.


The preparation of metallographic samples of aluminum alloys usually involves using MgO as a fine polishing agent when using the four step or five step method. However, due to the difficulty in providing very small particle sizes of MgO, it is not easy to use. Therefore, using alumina polishing solution instead of MgO is a good method.


However, it should be noted that the standard calcined alumina polishing medium is not suitable for the preparation of aluminum alloy metallographic samples, and colloidal aluminum dioxide suspension is the ideal polishing agent for the preparation of aluminum alloy samples.

In the aluminum alloy family, many metallographic samples of aluminum alloys are prepared through a four step preparation method. Aluminum oxide polishing solution combined with short/medium velvet polishing cloth is used to finely polish the samples, which not only retains all the intermetallic compound particles in the aluminum alloy, but also effectively controls floating defects. The four step preparation method for aluminum alloy samples by pulse detection metallographic engineers is shown in the table below:

Kind reminder: When using 6 μ M and 3 μ When MD diamond polishing solution is used for medium grinding, embedding phenomenon may occur. In this case, diamond polishing paste can be used instead of diamond polishing solution to effectively improve embedding defects.


Quickly grasp the methods for preparing aluminum alloy metallographic samples using aluminum oxide polishing solution. These methods are based on American QMAXIS grinding and polishing consumables, for reference only! If you have any questions or unresolved issues, please feel free to contact Kemai Testing Metallographic Engineer to discuss a more suitable solution for you.