发明名称 Surface treatment method for flux-brazed aluminum-made heat exchanger
摘要 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.
申请公布号 US7503381(B2) 申请公布日期 2009.03.17
申请号 US20050196292 申请日期 2005.08.04
申请人 NIPPON PAINT CO., LTD.;DENSO CORPORATION 发明人 INBE TOSHIO;MATSUI NORIZUMI;KOBAYASHI KENGO;KASEBE OSAMU
分类号 C23F11/10 主分类号 C23F11/10
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