Heat exchanger tube

摘要

Problem to be solved: to provide a tube of a heat exchanger capable of securing corrosion resistance while being capable of thinning the wall.The tube 20 of the heat exchanger comprises an outer tube 21 through which cooling water flows inside and an inner fin 22 provided inside the outer tube.The potential of the lowermost portion of the inner fin 22 is lower than the potential of the best portion of the heartwood 210 of the outer tube 21.A brazing filler layer is formed on the inner surface of the outer tube 21 and at least one of the surfaces of the inner fins 22.Diagram