½Å¼ÒÀç°øÇнÇÇè - The effect of Manganese in carbon steel / Title (The effect of Manganese in carbon steel.) Purpose. The effect of Manganese in carbon steel. Theory. Polishing. Polishing is the process of creating a smooth and shiny surface by rubbing it or using a chemical action, leaving a surface with significant specular reflection and minimal diffuse ¡¦