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American Galvanizers Association

Hot-dip galvanizing (HDG) offers many advantages relative to other corrosion protection systems. HDG offers both barrier protection of the substrate and cathodic protection. No paint system can do that. Unlike paint, HDG is actually THICKER at edges and corners, where paint systems are most susceptible to failure. And HDG can protect nooks and crannies that paint just can’t get to. Additionally, HDG is UV-resistant and is extremely durable. When applied to steel, HDG is actually harder than the steel substrate that it protects. Oh yes, let’s not forget that HDG provides immediate protection when it comes out the vat. There’s no need for the extended “curing” period required by many coating systems before the coated component can be placed into service.

In this course, you’ll learn the mechanisms of steel corrosion and how HDG protects steel by providing both barrier and cathodic protection. We’ll discuss the steps involved in HDG and how to prepare your assembly for HDG application. The course also looks at other methods for applying zinc to metallic components and how these alternate methods compare to HDG in both application and performance. Finally, we’ll examine the superior durability and protection afforded by a duplex system, which contains a HDG base combined with a topcoat paint system.

The student must take a multiple-choice quiz consisting of fifteen (15) questions at the end of this course to obtain PDH credits.

Specific Knowledge or Skill Obtained

This course teaches the following specific knowledge and skills:

• The direct and indirect costs incurred by society as a result of corrosion
• The mechanism that causes unprotected steel to corrode
• The mechanism by which HDG provides barrier and cathodic protection of the substrate steel
• The steps involved in the HDG process
• The corrosion-resistance and durability benefits afforded by HDG
• Alternate methods of applying zinc coatings and how they perform relative to HDG
• How to prepare your assembly for HDG
• ASTM standards related to HDG and what they cover
• The superior protection afforded by a duplex system
• The spalling that can result from corroded rebar in concrete and how HDG extends the service life of rebar
• Specific examples of how HDG has performed well long-term in some very harsh environments

Course

Click on the following link to the PDF document to review the course material before taking the quiz for credit.

Hot-Dip Galvanizing for Corrosion Protection

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To receive PDH credit for this course, you must pass a multiple-choice quiz.  Click the button below to Purchase Course and Take Quiz.  To take the quiz, your computer must be set to accept cookies. See how to check your cookie settings.