Zinc, symbolized as Zn with atomic number 30, is a versatile chemical element belonging to the zinc group. It presents a bluish-white appearance and is a moderately hard, brittle, and diamagnetic metal. Constituting approximately 0.01% of the Earth’s crust by mass, zinc plays a significant role in various industrial applications.
Ranked as the 24th most abundant element on Earth, zinc is found in minerals such as sphalerite. While not as abundant as aluminum, zinc’s importance in diverse industries is notable. In its pure form, zinc is relatively malleable and lacks the hardness of some other metals. However, when combined with other elements such as copper, aluminum, and magnesium, zinc forms alloys – compounds composed of two or more metals or a metal and a nonmetal. These alloys exhibit a range of beneficial properties, contributing to the versatility and utility of zinc in applications like galvanization, alloy production, and the manufacturing of diverse products.
Also known as “SAVES,” this category includes miscellaneous old zinc base die castings, with or without iron and other foreign attachments. It must be free of borings, turnings, dross pieces, chunks, melted pieces, and skimmings. Deductions apply for unmeltables, dirt, foreign attachments, and volatile substances like rubber, cork, plastic, grease, etc. Material containing more than 30% iron will not meet the criteria for good delivery.
Also known as “SCABS,” this category consists of new or unused, clean, zinc base die castings. The castings should be unplated, unpainted, and free from corrosion.
A zinc anode is a sacrificial anode used for cathodic protection to prevent corrosion. It has a strongly negative reduction potential, more negative than the metal it protects. When oxidants corrode metals, they oxidize the zinc anode instead of the protected metal structure, preventing corrosion.
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