发明名称 |
Oberflächenbehandlungsverfahren für mit Flussmittel hartgelöteten Aluminium- Wärmetauscher |
摘要 |
<p>There is disclosed a rust prevention and hydrophilization treatment method for a flux-brazed aluminum-made heat exchanger which comprises subjecting the same to a rust prevention treatment by the use of a zirconium base compound and/or a titanium base compound, and thereafter subjecting the same to a hydrophilization treatment by means of a hydrophilization treatment agent composition containing the under-mentioned components: (1) 40 to 90% by mass of polyvinyl alcohol having a degree of saponification of at least 90% ; (2) 3 to 40% by mass of polyoxyalkylene-modified polyvinyl alcohol in which 0.01 to 20% of pendant groups are polyoxyalkylene ether groups; (3) 1 to 30% by mass of an inorganic cross-linking agent which reacts with hydroxyl groups of the polyvinyl alcohol and modified polyvinyl alcohol; and (4) 1 to 20 % by mass of a guanidine compound and / or a salt thereof. The above simplified method dispenses with a flux removal step without causing wastewater treatment problems, and thus assures favorable rust prevention and deodorization effects.</p> |
申请公布号 |
DE602005001592(T2) |
申请公布日期 |
2008.04.17 |
申请号 |
DE20056001592T |
申请日期 |
2005.07.27 |
申请人 |
NIPPON PAINT CO. LTD.;DENSO CORP. |
发明人 |
INBE, TOSHIO;MATSUI, NORIZUMI;KOBAYASHI, KENGO;KASEBE, OSAMU |
分类号 |
F28F13/18;B05D7/14;C09D5/08;C09D129/04;C23C28/00;F28F19/04 |
主分类号 |
F28F13/18 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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