发明名称 |
Aluminum heat exchanger excellent in corrosion resistance |
摘要 |
The present invention provides a heat exchanger which is assembled by brazing an aluminum fin material to the outer surface of an aluminum tube material formed by bending a sheet material, in particular, an aluminum heat exchanger which can be suitably used as an automotive heat exchanger such as a condenser or evaporator. The tube material is formed of a two-layer clad sheet which includes a core material and an Al-Zn alloy layer clad on the core material. The Al-Zn alloy layer is clad on the outer surface of the tube material and brazed to the aluminum fin material. The potential of the Al-Zn alloy layer in a normal corrosive solution is at least 100 mV lower than the potential of the core material in the normal corrosive solution. The potential of the Al-Zn alloy layer in the normal corrosive solution is lower than the potential of the core material in high-concentration corrosive water. The normal corrosive solution refers to an aqueous solution containing 10 g/l of NaCl and 0.3 g/l of Na<SUB>2</SUB>SO<SUB>4</SUB>, and the high-concentration corrosive water refers to an aqueous solution in which the NaCl concentration is increased by 30 times by concentrating the above aqueous solution.
|
申请公布号 |
US7250223(B2) |
申请公布日期 |
2007.07.31 |
申请号 |
US20040860560 |
申请日期 |
2004.06.03 |
申请人 |
SUMITOMO LIGHT METAL INDUSTRIES, LTD. |
发明人 |
MIYACHI HARUHIKO;HASEGAWA YOSHIHARU;MAKIHARA MASAMICHI;ITOH YASUNAGA;YAMASHITA NAOKI;FUKUDA TOSHIHIKO |
分类号 |
F28F23/00;B23K1/00;B23K1/19;B23K101/14;B23K103/10;B32B7/02;B32B15/01;B32B15/20;F28F1/12;F28F1/42;F28F21/08 |
主分类号 |
F28F23/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|