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Sand Embedded
Example of Sand inclusion

Sand inclusion defects occur when sand becomes embedded in the castings and creates rough or bare spots on the surface of the galvanized steel. Sand inclusions are not removed by conventional acid pickling, therefore abrasive cleaning should be done before the products are sent to the galvanizer. This type of defect leaves bare spots and must be cleaned and repaired, or the part must be rejected, stripped, and regalvanized.  Sand embedded in a casting is shown to the left.

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