Removing white plaque requires drying the surface. Until the complete removal of the plaque on the galvanized surface, the air flow is limited, and therefore corrosion will continue, which will inevitably lead to damage to the zinc coating and the product itself.
As soon as the surface is dry, you can proceed with further actions, which depend on the degree of white plaque. With light RAID requires air flow. If it is not available, then the plaque is removed with a brush with a bristle of nylon. The plaque of medium and heavy degree is necessarily removed, since the zinc plaque is formed, which affects the reduction of the duration of operation of the coating and the product itself.
After removing the plaque with a brush and suitable detergent, the coating must be measured to ensure that it meets the required parameters for optimum protection of the steel. If the plaque has a medium or severe black color, the product must be subjected to re-galvanization.
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