Magnesium and its alloy materials, due to their low matrix hardness, strong ductility, and relatively high hardness of precipitates, are difficult to prepare during the metallographic sample preparation process. Mainly manifested in the prominent phenomenon of convexity. The general method to solve this problem is to reduce the polishing time appropriately, or use diamond polishing paste instead of polishing solution during polishing. In our laboratory, in addition to using the above two methods, we also use ChemoCloth metallographic polishing cloth imported from the United States with polishing agents for fine polishing, which is very effective.


The suggestion from the pulse detection engineer is that during the preparation of magnesium and its alloy samples, we use ChemoCloth polishing cloth from QMAXIS in the United States for fine polishing steps, which can easily solve the problem of protrusion.

This ChemoCloth metallographic polishing cloth from QMAXIS, USA, is made of chemically resistant synthetic fabric with a lint free surface suitable for use with 1µ Fine polishing of materials such as titanium, magnesium and their alloys, stainless steel, lead/tin solder, electronic packaging, soft non-ferrous metals, and plastics using Al2O3 and SiO2 polishing solutions of m and below.


This metallographic polishing cloth is very suitable for our preparation of magnesium alloy samples. Its porous fiber structure can better hold abrasive media particles, has good chemical corrosion resistance, and moderate softness and hardness characteristics. These characteristics allow the abrasive to penetrate deep into the interior of the fabric. Although the removal rate is lower during polishing, it can effectively avoid the occurrence of embossing and thus meet the technical requirements of sample preparation.

In addition, ChemoCloth metallographic polishing cloth is highly corrosion-resistant and will not show any shedding, discoloration, or curling. After a long time of use, apart from natural surface wear, there was no pollution or secondary damage to the surface of the prepared sample. It is much more durable than ordinary metallographic polishing cloth and has a prominent feature of long service life. The use of this metallographic polishing cloth is indeed very effective in solving the problem of floatation in the preparation of magnesium alloy samples! For more details, please feel free to contact the metallographic engineer responsible for pulse detection for more professional assistance.