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    2.
    发明专利
    未知

    公开(公告)号：DE3778715D1

    公开(公告)日：1992-06-11

    申请号：DE3778715

    申请日：1987-01-14

    Applicant: HENKEL CORP

    Inventor： FICK THOMAS H ,  FARINA SAMUEL T ,  KING PETER F

    IPC: C23C22/78 ,  C23G1/00 ,  C23G1/12 ,  C23G1/22

    Abstract: Aluminium containers are cleaned using an alkaline cleaning soln., followed by rinsing at least once with an aq. soln. whose pH is not more than 2.5. The use of the process as a pretreatment for aluminium containers before the application of coatings is also claimed. Pref. the aluminium containers are rinsed with an acid aq. soln. of pH about 2, whose temp. is less than 65.6 deg.C, esp. 32.2-54.4 deg.C, before and/or after treatment with the alkaline cleaning soln. After the alkaline treatment, the containers are rinsed in several steps, in which the second step involves rinsing with an aq. soln. whose pH is not more than 2.5. Pref. the rinsing with the aq. soln. is with a spray, the aq. acid soln. contains fluoride ions, and rinsing with water takes place after the rinsing with aq. acid. Pref. after treatment with the alkaline cleaning soln. and rinsing, the aluminium containers are dried.

    PROCESS FOR CLEANING ALUMINUM
    3.
    发明专利
    PROCESS FOR CLEANING ALUMINUM 未知

    公开(公告)号：CA1273861A

    公开(公告)日：1990-09-11

    申请号：CA525743

    申请日：1986-12-18

    Applicant: HENKEL CORP

    Inventor： FICK THOMAS H ,  FARINA SAMUEL T ,  KING PETER F

    IPC: C23G1/00 ,  C23G1/12 ,  C23C22/78

    Abstract: A process for cleaning aluminum surfaces to remove aluminum fines and residual organic contaminants on the surfaces thereof which is particularly applicable for cleaning drawn and ironed aluminum containers of the type employed in the packaging of foodstuffs and beverages. The process includes a sequential cleaning cycle including a primary alkaline cleaning step for effecting the removal of organic contaminants and aluminum fines followed by at least one acidulated water rinse treatment in which the solution is at a pH of below about 6, when the rinse solution contains an accelerating agent, and below about 2.5 when the rinse solution does not contain any accelerating agent, optionally followed by treatment with an aqueous solution adapted to apply a conversion coating on the surface thereof. The combination of treating steps has been found to surprisingly enhance the removal of stains from the surfaces and the mobility of the aluminum containers facilitating their transport in high-speed can lines having capacities in excess of about 1,000 cans per minute.

    METAL CLEANING PROCESS WITH IMPROVED DRAINING UNIFORMITY
    5.
    发明专利
    METAL CLEANING PROCESS WITH IMPROVED DRAINING UNIFORMITY 未知

    公开(公告)号：CA2183659A1

    公开(公告)日：1997-04-07

    申请号：CA2183659

    申请日：1995-10-06

    Applicant: HENKEL CORP

    Inventor： FICK THOMAS H ,  KELLY TIMM L

    IPC: B08B3/08 ,  C23G1/12

    Abstract: In a process of cleaning aluminum cans by contact with a principal aqueous liquid cleaning composition containing acid and surfactants and subsequently rinsing the cleaned cans with an aqueous first postcleaning rinsing composition, the uniformity of draining (freedom from "water breaks") is improved by including aluminum cations in the first postcleaning rinsing composition.

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