Flux compositions for steel galvanization

    公开(公告)号:US10793940B2

    公开(公告)日:2020-10-06

    申请号:US14062170

    申请日:2013-10-24

    IPC分类号: C23C2/30 C23C2/02 C23C2/06

    摘要: A flux composition for treating a metal surface prior to batch hot galvanizing in molten zinc-based alloys is disclosed. The flux composition can include (a) 40 to 70 wt. % zinc chloride, (b) 10 to 30 wt. % ammonium chloride, (c) 6 to 30 wt. % of a set of at least two alkali or alkaline earth metal halides, (d) from 0.1 to 2 wt. % lead chloride, and (e) from 2 to 15 wt. % tin chloride, provided that the combined amounts of lead chloride and tin chloride represent at least 2.5 wt. % of the composition. A fluxing bath having this flux composition dissolved in water for use in galvanizing processes, as well as, a method for continuous or batch-wise treatment of metal articles in order to produce a protective coating layer with a thickness ranging from 5 to 30 μm is also disclosed.

    Systems and Methods for Removing Impurities from Galvanizing Flux Solution

    公开(公告)号:US20190249287A1

    公开(公告)日:2019-08-15

    申请号:US16397059

    申请日:2019-04-29

    IPC分类号: C23C2/30 C23C2/00

    摘要: A method for removing soluble ferrous iron from a galvanizing flux solution includes circulating the flux solution through a concentration loop and injecting ozone into the concentration loop, wherein the ozone mixes with the flux solution and reacts with soluble ferrous iron to form insoluble ferric iron in the loop. Flux solution that is substantially free of insoluble ferric iron may be removed from the concentration loop through a filter medium such as a cross-flow microfilter, thereby concentrating the ferric iron in the concentration loop. The ozone may be injected through an eductor that utilizes motive force from a circulation pump, thereby reducing energy consumption and providing rapid mixing and reaction of ozone and ferrous iron.

    Horizontal soldering system with oil blanket
    8.
    发明授权
    Horizontal soldering system with oil blanket 失效
    带油毡的水平焊接系统

    公开(公告)号:US5934540A

    公开(公告)日:1999-08-10

    申请号:US903905

    申请日:1997-07-31

    摘要: A solder immersion chamber in a solder crater/leveler includes a solder manifold having upper and lower solder chambers, from which solder is directed onto the top and bottom surfaces of printed circuit boards conveyed therebetween. The solder immersion chamber has a pair of driven rollers at either end thereof for conveying the printed circuit boards through the solder immersion chamber, and for damming and holding the molten solder within the solder immersion chamber. A pair of oil weirs is provided adjacent either side of the upper solder chamber for continuously flowing oil to flood the top surface of the molten solder in the solder immersion chamber. A skimmer skims oil from the top surface of the molten solder, and returns the separated oil to the pair of oil weirs.

    摘要翻译: 焊锡槽/矫平机中的焊锡浸没室包括具有上焊料室和下焊接室的焊料歧管,焊料从该焊料歧管引导到印刷电路板的顶表面和底表面。 焊锡浸没室在其任一端具有一对从动辊,用于通过焊料浸没室输送印刷电路板,并且将熔融焊料阻挡并保持在焊料浸没室内。 在上部焊料室的两侧附近设置一对油堰,用于连续地流动油以浸渍焊料浸没室中的熔融焊料的顶部表面。 撇渣器从熔融焊料的顶部表面吸油,并将分离的油返回到一对油堰。

    Flux suitable for coating molten zinc, molten alloy of aluminum and
zinc, and molten aluminum
    9.
    发明授权
    Flux suitable for coating molten zinc, molten alloy of aluminum and zinc, and molten aluminum 失效
    助焊剂适用于熔融锌,铝和锌的熔融合金以及熔融铝

    公开(公告)号:US5292377A

    公开(公告)日:1994-03-08

    申请号:US928168

    申请日:1992-08-13

    IPC分类号: C23C2/30 B23K35/34

    CPC分类号: C23C2/30

    摘要: A flux for use in a dry process for the flux treatment of the material to be coated with molten metal contains at least one chloride selected from the group consisting of zinc chloride, stannous chloride, an alkali metal chloride and an alkaline earth metal chloride and at least one aliphatic nitrogen derivative with alkyl group having 1 to 18 carbons. The treatment of steel with this flux enables the formation of a coating having a good finish from, among others, a molten alloy of zinc and aluminum, which may further contain other elements, or molten aluminum, by a single dipping operation in an atmospheric environment which has hitherto been difficult. A process for manufacturing steel coated with molten metal, including its treatment with the flux, is also disclosed.

    摘要翻译: 用于干法处理用于熔融金属涂层材料的助熔剂的助熔剂含有选自氯化锌,氯化亚锡,碱金属氯化物和碱土金属氯化物中的至少一种氯化物,并且在 至少一种具有1至18个碳原子的烷基的脂族氮衍生物。 用这种焊剂处理钢可以通过在大气环境中的单次浸渍操作,从而形成具有良好光洁度的涂层,其中包括可以进一步包含其它元素或熔融铝的锌和铝的熔融合金 到目前为止这是困难的。 还公开了一种用熔融金属涂覆钢的方法,其中包括用焊剂进行处理。

    Process for preheating and preparing ferrous metal for galvanizing
    10.
    发明授权
    Process for preheating and preparing ferrous metal for galvanizing 失效
    用于预热和制备用于镀锌的黑色金属的工艺

    公开(公告)号:US4140821A

    公开(公告)日:1979-02-20

    申请号:US664359

    申请日:1976-03-05

    CPC分类号: C23C2/30 C23C2/02

    摘要: A process for simultaneously preheating and preparing a ferrous surface, prior to the depositing thereon of galvanized zinc coatings, replaces conventional fluxing techniques with the step of immersing a ferrous object in a bath of a molten salt or salts. The salts are chosen so that they are liquid at a temperature below that of the zinc coating step. The liquid acts as a non-fuming flux and preheat for the surface. Particular salts include metallic hydroxides and halides.

    摘要翻译: 在其上沉积镀锌锌涂层之前,同时预热和制备铁质表面的方法代替常规的助熔技术,其中将铁质物体浸入熔融盐或盐的浴中。 选择盐,使其在低于锌涂层步骤的温度下为液体。 该液体作为非发烟通量并用于表面预热。 特殊的盐包括金属氢氧化物和卤化物。