Inspection
How long does it take to convert Chromium VI to Chromium III on galvanized steel?
Some galvanized steel is dipped into chromium quenches after hot-dip galvanizing. The chromium creates a passivated surface on the galvanized coating that prevents wet storage
Is it possible to have steel with chemistry that is too good for galvanizing?
It is possible to have steel chemistry with levels of silicon and phosphorus that are too low to meet the minimum thickness levels specified in
Can non-members get technical support from the AGA?
One of the benefits of being a member of the American Galvanizers Association (AGA) for galvanizers is free unlimited technical support. The AGA technical staff
Rough Surface on Overlapped Area of Progressively Dipped Steel
Why does the overlapped area on some progressively dipped steel have a rougher surface and thicker zinc coating than the other area of the same
Salt-Spray/Fog Accelerated Corrosion Testing of HDG Steel
Laboratory testing of the corrosion rate of galvanized steel coatings is not an accurate predictor of the actual corrosion rate in real-world applications. This is
Zinc-Rich Paints
Zinc-rich paint is applied to a clean, dry steel surface by either a brush or spray. Zinc-rich paints must contain either between 65% to 69% metallic zinc
Passivation Testing
The specification to determine the presence of chromate on zinc surfaces is ASTM B 201. This test involves placing drops of a lead acetate solution on
Bending Test
The hot-dip galvanized coating on a steel bar must withstand bending without flaking or peeling when the bending test is preformed in accordance with the
Zinc Skimmings
Zinc skimming deposits are usually caused when there is no access to remove the zinc skimmings during the withdrawal of the steel from the galvanizing
Weeping Weld
Weeping welds stain the zinc surface at the welded connections on the steel. Caused by entrapped cleaning solutions that penetrate the space between the two
