Process for providing aluminum substrates with light-absorptive surface
layer
    1.
    发明授权
    Process for providing aluminum substrates with light-absorptive surface layer 失效
    为铝基板提供光吸收表面层的工艺

    公开(公告)号:US4145234A

    公开(公告)日:1979-03-20

    申请号:US882339

    申请日:1978-03-01

    申请人: Herbert Meissner

    发明人: Herbert Meissner

    摘要: To provide a substrate of aluminum with a dark surface layer of high absorption/emission ratio for luminous energy, the degreased and pickled substrate is immersed in a hot chromating bath until an oxide coating of not more than 2.5.mu. thickness is formed thereon. This coating is then colored black in a hot, acidic dyeing solution (pH between about 0.5 and 5) of potassium permanganate and a nitrate of cobalt or copper.

    摘要翻译: 为了提供具有高吸收/发射比的暗表面层的铝的基底,将脱脂和酸洗的基底浸入热镀铬浴中,直到在其上形成不超过2.5μm的氧化物涂层。 然后将该涂层在高锰酸钾和钴或铜的硝酸盐的热酸性染色溶液(约0.5至5的pH)中着色为黑色。