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 …
Inspection of the Galvanizing Cleaning and Coating Process Read More »
Introduction – A number of different coating systems can be applied to galvanizing for both beautification and protection. When galvanizing is coated, the longevity of the corrosion protection system is greater than the sum of the longevity of the galvanizing alone and the coating system alone. A system that consists of coated galvanizing is generally …
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, …
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 …
Measurement of the Thickness of Hot Dipped Galvanizing Read More »
Introduction – Hot dip galvanizing (HDG) of iron and steel results in a durable layer of corrosion protection that often exceeds the performance of liquid applied coatings. But despite the metallurgical reaction that results in an alloying of the molten zinc with the iron of the underlying substrate, the galvanizing layer can be susceptible to …
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 …
Inspection of the Hot Dipped Galvanizing Process Read More »
Powder coating metallic surfaces for corrosion protection and aesthetic purposes has grown by leaps and bound in the United States and more so in other parts of the world. The use of powder coating on aluminum and steel sheet products has led the way to greater technology and reduced costs as the demand has grown. …
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 …
Hot Dip Galvanizing Versus Zinc Rich Primers – Which Protects Better? Read More »
Galvanizing is the application of a zinc layer to steel by a variety of methods such as hot dip, continuous or electro-deposition. In many instances galvanized steel is not painted since the service life of galvanizing alone typically exceeds that of conventional protective coatings. When paint is applied to galvanizing it often is referred to …
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 …
Preparing Hot Dip Galvanizing for Painting – It’s not Overly Complicated Read More »