HIGHLY CORROSION-RESISTANT HEAT EXCHANGER SYSTEM USING CONTROL OF ALLOY COMPOSITION AND ALLOY POTENTIAL

摘要

The present invention relates to the improvement of corrosion resistance of a tube, a pin, and a header, which are heat exchanger parts and are made of an aluminum material, wherein: one or more tubes, one or more headers, one or more brazing header clads, one or more fins (or heat dissipation plates), and one or more brazing pin clads are made of an aluminum alloy material; the corrosion potential of the tubes is -950 mV to 650 mV; the corrosion potential of the headers is 0-150 mV on the basis of the corrosion potential of the tubes; the corrosion potential of the header clads is 20-100 mV on the basis of the corrosion potential of the tubes; the Cu content of the aluminum alloy is 0.001-0.50 wt%; the Zn content of the aluminum alloy is 0.001-5.00 wt%; and the tubes, the headers, and the fins are joined by a brazing process using a header clad material and a fin clad material.