The choice of metallographic corrosive in the sample of electro-deposition silicon steel section

There are many methods to show the micro structure of the metallographic, such as chemical erosion method, electrolytic erosion method, in which the former is the most commonly used. In this experiment, several kinds of corrosive are used to do the erosion. Use metallographic microscope to analyze the section and confirm the best corrosive. ? (2014) Trans Tech Publications, Switzerland.