PURPOSE: To provide a laminate of superior resistance to corrosion and resistance to hot water without generating rust on a steel surface for a long period of time even when used under severe conditions such as temperature difference between the inner side of hot water and the inner face of outer face.

CONSTITUTION: A hot rolled steel sheet is heated up to the surface temperature of 150°C-550°C to form an oxide film of 10μ thickness, and then 60wt.% isopropanol solution of di-1 propoxy.bis(acetylacetonate) titanium is applied by using a brush and drying by wind, and then heated to form a a primer sintered layer of 15μm thickness. Vinyl trimethoxysilane of 1wt.% and di-t-butyl peroxide of 0.01 wt.% to straight chain-shaped low-density polyurethane of 100wt.% is added to the surface and kneaded at 190°C, and modified silane graft polyethylene is extruded and fusion bonded to form a silane graft straight chain-shaped low-density polyethylene coated layer.