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Galvanizing

galvanizing

Inspection of the Galvanizing Cleaning and Coating Process

Introduction – Hot dip galvanizing is cleaned and painted for both beautification and protection.  This coated galvanizing system is commonly called a Duplex System. In order for coatings to adhere and provide the desired service life, the quality of surface preparation and coating application must be assured.  This can be accomplished by thoroughly inspecting each …

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galvanizing

Preparation of Galvanizing for Painting

You can listen to this article by clicking “Listen” and following along. Or, you can read the traditional way below. ________ Introduction – Hot dip galvanizing is painted for aesthetics or to capitalize on the synergistic effects of conventional paints to provide a protective barrier over the galvanizing, improving the longevity of the system.  Unfortunately, …

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galvanizing

Measurement of the Thickness of Hot Dipped Galvanizing

This article was written by KTA’s Tom Neal & Doug Reardon Introduction – The controls required for the hot-dip galvanizing process are described in Topic 1 of this series.  In addition to monitoring the galvanizing process, the thickness or weight of the galvanizing must be determined to verify that it complies with the requirements of …

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hot dipped galvanizing

Inspection of the Hot Dipped Galvanizing Process

Introduction – Galvanizing is the application of a zinc coating to iron and steel by the hot dipping process. The process involves the dipping of both fabricated and unfabricated pieces into hot molten zinc, usually about 840° F (449°C).  Quality galvanizing starts before the item is dipped into the molten zinc and in some cases …

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hot dip galvanizing

Hot Dip Galvanizing Versus Zinc Rich Primers – Which Protects Better?

There are several methods by which a coating can protect steel from corrosion. One of the most effective methods is by providing galvanic protection.  Galvanic protection works by covering the steel surface with a metal that will preferentially corrode instead of the steel when the surface comes in contact with an electrolyte, usually water. All …

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failure paint to hot dip galvanizing

Preparing Hot Dip Galvanizing for Painting – It’s not Overly Complicated

Bare galvanizing provides excellent corrosion protection at a pH between 7 and 13, but corrosion of the zinc increases as the pH becomes more acidic (less than 7), or more alkaline (greater than 13).  When galvanizing is exposed to the lower or higher pH ranges, it should be painted.  Paint should also be applied when …

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