Flux inclusions can be created by the failure of the flux to release during the hot-dip galvanizing process. If this occurs, the galvanized coating will not form under the flux spot. If the area is small enough, it can be cleaned and repaired. If the flux inclusion covers a large area, then the part must be rejected. Flux deposits on the interior of a hollow part, such as a pipe or tube, as seen in the image to the right, cannot be repaired, and the part must be rejected. Parts rejected for flux deposits may be stripped of their zinc coating and then regalvanized.
© 2023 American Galvanizers Association. The material provided herein has been developed to provide accurate and authoritative information about after-fabrication hot-dip galvanized steel. This material provides general information only and is not intended as a substitute for competent professional examination and verification as to suitability and applicability. The information provided herein is not intended as a representation or warranty on the part of the AGA. Anyone making use of this information assumes all liability arising from such use.