Mechanical assembly with incompatible metallic materials

摘要

Various parts in an assembly of parts are made of differing metals having incompatible ionization characteristics. Any two parts which have incompatible ionization characteristics are separated from one another such that corrosion inducing contact therebetween is eliminated. Therefore, the possibility of electrolytical corrosion can be reduced. For example, in one embodiment a spool assembly in a spinning reel includes a magnesium-alloy first part (12) and a second part (20) formed of another metal coupled to the magnesium alloy part at a clearance (20b). The other metal and the magnesium-alloy have ionization characteristics that are not compatible, leading to possible electrolytic corrosion therebetween. However, an electronically insulating filling agent (20c) is injected into a clearance between the first (12) and second (20) parts. <IMAGE>