公开(公告)号：US20030070730A1

公开(公告)日：2003-04-17

申请号：US09974458

申请日：2001-10-10

申请人： Topy Industries, Limited

发明人： Toru Shimizu ,  Takayuki Sato ,  Tatsuya Oguri ,  Keiji Maetsuji ,  Kazuo Nobe

IPC分类号： C23C028/00

CPC分类号： B05D7/51 ,  B05D2202/25 ,  C23C22/361

摘要： The present invention provides a method of coating aluminum and aluminum alloy substrates by which not only a corrosion resistance comparable or even superior to that afforded by chromate treatment can be imparted but also the adhesion to the coating film can be improved, while the luster of aluminum is fully retained, notwithstanding the use of a chromium-free treating solution, as well as a coated article with the coated surface according to the above method having a metallic luster. The present invention provides a method of coating aluminum and aluminum alloy substrates which comprises treating an aluminum or aluminum alloy substrate with an acidic solution containing sulfuric acid and 0.2 to 0.4 g/L of a ferric ion and having a pH value of 0.6 to 2.0, subjecting the same to chemical conversion treatment with an acidic coat-forming agent containing 0.01 to 0.125 g/L of a zirconium or titanium ion, 0.01 to 1.0 g/L of a phosphate ion, and 0.01 to 0.5 g/L of a fluoride ion and having a pH value of 1.5 to 4.0, followed by coating.

摘要翻译： 本发明提供了一种涂覆铝和铝合金基材的方法，其不仅可以赋予与铬酸盐处理相当或甚至优异的耐腐蚀性，而且可以提高对涂膜的粘附性，同时铝的光泽 完全保留，尽管使用无铬处理溶液，以及具有根据上述方法的具有金属光泽的涂覆表面的涂布制品。 本发明提供了一种铝和铝合金基板的涂覆方法，其包括用含硫酸的酸性溶液和0.2〜0.4g / L的铁离子处理铝或铝合金基板，其pH值为0.6〜2.0， 使用含有0.01〜0.125g / L的锆或钛离子，0.01〜1.0g / L磷酸根离子和0.01〜0.5g / L氟离子的酸性成膜剂进行化学转化处理 pH值为1.5〜4.0，然后进行涂布。