ILZRO Classifications of Sandelin Steels

Research carried out by the University of Cardiff in Wales for ILZRO (International Lead Zinc Research Organization) project took an in-depth look at the problem of silicon reactivity and included phosphorous as a r...
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William E. Acra Receives Daniel M. Hubbell Memorial Award

The Market Development Committee (MDC) of the American Galvanizers Association (AGA) is pleased to announce Mr. William (Bill) Acra of AZZ Galvanizing Services is the 2016 winner of the Daniel M. Hubbell Award. The...
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Weld Slag Clean Up Requirements for Galvanizing

When welded structures are hot-dip galvanized, the weld area cleanliness significantly affects the quality and appearance of the galvanized coating around the weld.  If a coated electrode (i.e. a flux-coated welding...
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How to Clean Wet Storage Stain

Treatment of wet storage stain begins with drying the galvanized surface. As long as water remains on the zinc surface, and airflow is limited, the corrosion mechanism responsible for wet storage stain will continue...
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Wet Storage Stain vs. White Rust

Many people perceive wet storage stain to be the same as white rust and use the two terms interchangeably, but they do have distinct differences. Wet storage stain is the commonly known problem of white surface oxi...
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How to Prevent Wet Storage Stain

Prevention of wet storage stain includes not tightly stacking newly galvanized products on top of one another, removing standing water, and providing adequate air flow over the zinc surfaces. Newly galvanized artic...
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Visual Observations for Finish and Appearance

The image to the right shows products with connected galvanized pieces that have different appearances. The appearances of these pieces differ greatly from one another due to the steel chemistry of the dif...
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Reasons for Different Appearances

The amount of silicon added during the steel-making process can create differences in the appearance of galvanized products. The Sandelin Curve, as seen in the image to the left, compares zinc coating thic...
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Bare Spots

Bare spots, uncoated areas on the steel surface, can occur because of inadequate surface preparation. Bare spots may be caused by welding slag, sand embedded in castings, excess aluminum in the galvanizing...
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Chain and Wire Marks

A type of surface defect occurs when steel is lifted and transported using chains and wires attached to overhead cranes. Lifting devices can leave uncoated areas on the finished product that will need to b...
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