Weep stains

Overlapping plates are too close together for the zinc to penetrate. During the cleaning process the pre-treatment fluids collect in this space. When dipped they dry out. When placed in the yard the moisture in the air re-hydrates this salt and it weeps out. It is not rust at this stage. There will be rust formation between these two plates unless they are sealed off. This cannot be avoided and is acceptable.

red stain rust weep

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