| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an exhaust heat exchanger capable of suppressing generation of a through-hole caused by corrosion (pitting-corrosion) while decreasing the number of components.SOLUTION: An exhaust heat exchanger comprises: a tube 21 inside of which exhaust air flows and outside of which a cooling medium flows; and a fin 22 arranged in the tube 21 and increasing an area of heat transfer with the exhaust air. The fin 22 is formed by cutting and raising a tube constituent material constituting the tube 21, and an acid-proof coating film 30 is formed on an inner surface of the tube 21 and a surface of the fin 22.</p> |
