| 摘要 |
PROBLEM TO BE SOLVED: To produce heat resistant sprayed coating in which deterioration in corrosionproof sprayed-coating on the back face of the weld zone in T joint or backing butt welding is prevented and corrosionproof effect therein is maintained. SOLUTION: The back face of an iron base material is provided with lower layer coating with 100 to 750μm coating thickness composed of a heat resistant metallic material having a melting temp. higher than that of zinc and upper layer coating with 100 to 350μm coating thickness composed of a metallic material for corrosionproof. Preferably, either one kind among steel, stainless steel and aluminum as the lower layer coating and either one kind of aluminum and zinc as the upper layer are respectively combined.
|
