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Heat exchanger

  • US 20010010262A1
  • Filed: 03/06/2001
  • Published: 08/02/2001
  • Est. Priority Date: 08/06/1999
  • Status: Abandoned Application
First Claim
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1. A heat exchanger for carrying out a heat exchange between oil and cooling water, which comprises:

  • a plurality of first plates and a plurality of second plates that are composed of aluminum or an aluminum alloy, and that are alternately laminated and joined by brazing;

    oil passages which are each formed between one surface of one of the first plates and one surface of one of the second plates that is arranged to face the one surface of the first plate, and through which oil passes;

    cooling water passages which are each formed between the other surface of the one of the first plates and one surface of one of the second plates that is arranged to face the other surface of the first plate, and through which cooling water passes; and

    cooling water side fins brazed to the inner wall surfaces of the cooling water passages, wherein the cooling water side fins are composed of aluminum or an aluminum alloy having a corrosion potential more negative than those of the core layers of the first plates and the second plates, and a sacrificial corrosive layer having a corrosion potential more negative than those of the core layers of the first plates and the second plates and the cooling water side fins is formed on each of the above other surface of the first plate and the surface of the second plate that faces the above other surface of the first plate.

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