ASTM A882/A882M-20 ,Standard Specification for Filled Epoxy-Coated Seven-Wire Steel Prestressing Strand.
ASTM A882/A882M-20 covers seven-wire steel prestressing strand with protective fusion-bonded epoxy powder coating applied by the electrostatic deposition method or other suitable method, with the interstices of the seven wires filled with epoxy to minimize migration of corrosive media, either by capillary action or other hydrostatic forces.
ASTM A882/A882M-20 is applicable for orders in either inch-pound units (as Specification A882) or SI units [as Specification A882M].
6. Surface Preparation
6.1 The surface of the steel strand to be coated shall be cleaned chemically or by another method that will impart the same cleanliness to ensure that the coated strand meets the requirements of Section 8.
7. Application of Coating
7.1 The epoxy powder coating shall be applied to the cleaned surface as soon as possible after cleaning and before oxidation of the surface visible to a person with normal or corrected vision occurs.
7.2 The epoxy powder coating shall be applied by the electrostatic deposition method, or other method that will meet the coating requirements in Section 8, and fully cured in accordance with the recommendations of the manufacturer of the epoxy powder coating.