SURFACE PROTECTION METHOD FOR OPEN RACK TYPE CARBURETOR

摘要

PROBLEM TO BE SOLVED: To provide a surface protection method for repairing a decreased part or an annihilated part of a clad layer for covering the surface of an open rack type carburetor and a non-clad part in which the clad layer does not exist. SOLUTION: Either one or both of the decreased or annihilated portion (an A-surface or B-surface) of the clad layer 10 and the non-clad part (a C-surface), and the clad layer 10 (a KO-surface) around them are treated so that the surface roughness (Rz) of the existing part and non-existing part of the clad layer is uniform and coarse, and then an aluminum-zinc alloy with a corrosion potential lower by 30-100 mV than the corrosion potential of the clad layer is sprayed to form a fused aluminum-zinc alloy sprayed layer thinner than the thickness of the initial clad layer. It is preferable to provide a form of the thickness of the clad layer being 150-1,000μm and a form of the surface roughness (Rz) after uniform roughening treatment being 100μm or more. COPYRIGHT: (C)2010,JPO&INPIT