Mill Scale Sales and Information Such As Mill Scale Uses
5.2 Pit Depth Measurement: 5.2.1 Metallographic—Pit depth can be determined by sec-tioning vertically through a pre-selected pit, mounting the cross-sectioned pit metallographically, and polishing the sur-face. The depth of the pit is measured on the ﬂat, polished surface by the use of a microscope with a calibrated eyepiece.Coke is a grey, hard, and porous fuel with a high carbon content and few impurities, made by heating coal or oil in the absence of air—a destructive distillation process. It is an important industrial product, used mainly in iron ore smelting, but also as a fuel in stoves and forges when air pollution is a concern.. The unqualified term "coke" usually refers to the product derived from low .