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Hot dip galvanizing steel articles after fabrication is one of the most widely used methods to provide corrosion protection. As a final step in the process, the hot dip galvanized coating is inspected for compliance with specifications. Correct measurement techniques and accurate interpretation of the results are necessary to provide an acceptable hot dip galvanized coating.
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Plant maintenance engineers continually search for new and improved ways of providing corrosion protection in their highly demanding environments. Structural steel is used throughout various applications including pipe racks, building components (beam and column configurations), reactor platforms, and signage, etc. Coatings systems have traditionally been the choice of providing corrosion protection for both steel and concrete substrate.
Duplex systems, also known as painting over hot dip galvanized steel, are extremely effective corrosion protection systems. However, careful surface preparation techniques need to be used to alleviate potential coating failures. The age and characteristics of the galvanized coating should be used to determine what type of surface preparation is needed.