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Galvanizing for Corrosion Protection

Semih Genculu, P.E.

The excellent resistance of zinc to corrosion in many environments and its ability to protect steel galvanically account for its succesful use and performance in a wide variety of applications. The principal uses of zinc for corrosion control are as a coating for steel and as zinc anodes for cathodic protection. This course will focus on its use as a coating, mainly by the hot dip galvanizing process. Galvanizing involves dipping prepared steel (in sheet or fabricated form) in a molten zinc bath. The process imparts a unique structure consisting of tough alloy layers which are metallurgically bonded to the steel surface. This creates an excellent barrier coating which has a very low corrosion rate. In addition to creating an excellent barrier between the steel and its environment, zinc also has the ability to protect the underlying steel galvanically. If the coating should become damaged such that the steel is exposed, the surrounding zinc will corrode preferentially and protect the exposed area from rusting.

This course includes a multiple-choice quiz at the end, which is designed to enhance the understanding of the course materials.

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NY PE & PLS: You must choose courses that are technical in nature or related to matters of laws and ethics contributing to the health and welfare of the public. NY Board does not accept courses related to office management, risk management, leadership, marketing, accounting, financial planning, real estate, and basic CAD. Specific course topics that are on the borderline and are not acceptable by the NY Board have been noted under the course description on our website.