Properties and Applications of Polyurethane Coated Sheet Piling.

In an investigation of the effectiveness of different polyurethane elastomers as protective coatings of sheet pilings used in underground and underwater construction, a comparison was made of tar-modified polyurethanes, tar epoxy systems, and epoxy resins. The results show that the corrosion behavior of the coatings is essentially determined by the pretreatment of the substrate. Because of the high strength and corrosion, abrasion, and impact resistancje of sprayed polyurethane coatings, coated parts can be shipped without danger of being damaged. Welding of coated parts is also possible, because only local repair of the coating is required afterwards.