| 摘要 |
The invention relates to heat exchangers and methods for the manufacture thereof. More specifically, the invention relates to fully brazed heat exchangers which are resistant to an aggressive medium, due to brazing joints (5) between cover plates (1, 2) and duct plates (3) being protected by a coating resisting the aggressive medium. The protective coating may consist of a metal such as tin or silver, whereas the cover plates and duct plates are made of acid-resistance stainless steel and the solder is copper solder. According to the method, a coat-forming material is circulated through the brazed heat exchanger, and is subsequently discharged, whereupon a coating is formed at the brazing joints (5). |
