645.1 General Description
This work includes field repairing damaged galvanized coatings, except coatings on wire and chain-link wire fence. When galvanized materials are welded, the work applies to the welded area and to the damaged areas adjacent to the weld. It does not apply to new materials deficient in coating.
645.1.01 Definitions
General Provisions 101 through 150.
645.1.02 Related References
A. Standard Specifications Section 870—Paint B. Referenced Documents General Provisions 101 through 150.
645.1.03 Submittals
General Provisions 101 through 150.
645.2 Materials
Use material for repairing galvanized coatings that conforms to the following: Material Section Galvanizing Repair Compound 870.2.05
645.2.01 Delivery, Storage, and Handling
General Provisions 101 through 150.
645.3 Construction Requirements
645.3.01 Personnel
General Provisions 101 through 150.
645.3.02 Equipment
General Provisions 101 through 150.
645.3.03 Preparation
Before applying repair compounds: 1. Clean the area of grease using an approved solvent recommended by the producer of the galvanizing repair compound. 2. Thoroughly brush the area with a stiff wire brush to remove dirt, loose galvanizing, welding slag, or other foreign material.
645.3.04 Fabrication
General Provisions 101 through 150.
645.3.05 Construction
Apply the repair compound smoothly and evenly with a moderately filled paint brush when the temperature of the steel, compound, and surrounding air is above 45 °F (7 °C). On smooth surfaces, ensure that the minimum dry film thickness is 2 mils (0.05 mm). On rough and pitted surfaces, the Engineer may require more than one coat. When additional coats are required, allow a drying time of at least four hours between coats. Do not brush over partly dried applications.
645.3.06 Quality Acceptance
General Provisions 101 through 150.
645.3.07 Contractor Warranty and Maintenance
General Provisions 101 through 150.
645.4 Measurement
This work will not be measured separately for payment.
645.4.01 Adjustments
General Provisions 101 through 150.
645.5 Payment
This work shall be performed at the Contractor’s expense.
645.5.01 Adjustments
General Provisions 101 through 150.
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