Abstract: A metal pipe melt-coated with a thermoplastic synthetic resin using an adhesive composition which contains as major components 5-50 parts by weight of an oil-soluble phenol resin, 5-60 parts by weight of an ethylene copolymer and 5-50 parts by weight of a petroleum hydrocarbon compound having a mean molecular weight in the range of 50,000 to 1,000,000.

Abstract: There are applied in layers on the surface of a metal pipe, a rapid hardening and cure type corrosion preventive material consisting essentially of isocyanate terminated polyurethane prepolymer, amine base hardener and petroleum resin, and a reinforcing material consisting of silica sand, blast furnace slag or the like. Thus there are provided a plurality of coatings or layers on the metal pipe, which are excellent in impact resisting and corrosion preventive properties.

Abstract: There is disclosed a method for producing aluminum coated steel comprising cleaning the surface of a steel substrate by grid- or shot-blasting or by pickling followed by rinsing with water and thermal spraying with aluminum thereon in a thickness ranging from 30 to 300 microns while heating said surface sufficiently to maintain it at a temperature ranging from about 100.degree. to 500.degree.C.The aluminum coated steel may be thereafter be treated by heating it at a temperature ranging from 150.degree. to 600.degree.C for 3 minutes to 24 hours after it has been cold-rolled to a reduction of area from 5 to 80% or after it has been hot-rolled at a temperature ranging from 150.degree. to 600.degree.C.