| 摘要 |
PROBLEM TO BE SOLVED: To provide a bonded body of pipe members with excellent collision resistance over a long period and a refrigeration cycle device having the bonded body.SOLUTION: There are provided an inner fitting pipe member 50 having an inner fitting pipe sacrificial corrosion preventive layer 53 in an outer peripheral surface thereof and an outer fitting pipe member 60 that is fitted around the inner fitting pipe member 50 and has an outer fitting pipe sacrificial corrosion preventive layer 63 in an outer peripheral surface thereof. The inner fitting pipe member 50 and the outer fitting pipe member 60 are bonded by brazing and the inner fitting pipe sacrificial corrosion preventive layer 53 and the outer fitting pipe sacrificial corrosion preventive layer 63 have an anticorrosive effect. Since corrosion potential becomes lower in the order of a brazing filler fillet 70 formed in the brazing, the inner fitting pipe sacrificial corrosion preventive layer 53 and the outer fitting pipe sacrificial corrosion preventive layer 63, corrosion of the outer fitting pipe sacrificial corrosion preventive layer 63 with the lowest corrosion potential occurs first to suppress corrosion of the inner fitting pipe sacrificial corrosion preventive layer 53 and a fluid leakage in the bonded part by brazing is prevented, thereby making it possible to sustain corrosion resistance performance over a long period. |
