4-alkyl and aryl semicarbazides as oxygen scavengers
    2.
    发明授权
    4-alkyl and aryl semicarbazides as oxygen scavengers 失效
    4-烷基和芳基氨基脲作为除氧剂

    公开(公告)号:US5904857A

    公开(公告)日:1999-05-18

    申请号:US839854

    申请日:1997-04-17

    申请人: Bruce R. Bailey

    发明人: Bruce R. Bailey

    摘要: A method for removing dissolved oxygen from alkaline water containing dissolved oxygen at a temperature greater than 250.degree. F. which comprises the step of: adding to said alkaline water containing dissolved oxygen an effective oxygen-scavenging amount of a water-soluble semicarbazide of the formula ##STR1## wherein R.sub.1 and R.sub.2 are selected from the group consisting of C.sub.1 -C.sub.10 alkyl, cycloalkyl, aryl, cycloalkyloxy and alkyloxy groups.Preferred materials are 4-phenyl semicarbazide, 4-isopropyl semicarbazide, 4-4-diethyl semicarbazide and carbazoyl morpholine. Below 400.degree. F., a catalyst is also required.

    摘要翻译: 一种在大于250°F的温度从含有溶解氧的碱性水中除去溶解氧的方法,其包括以下步骤:向所述含有溶解氧的碱性水中加入有效的除氧量的式(I)的水溶性氨基脲 其中R1和R2选自C1-C10烷基,环烷基,芳基,环烷氧基和烷氧基。 优选的材料是4-苯基氨基脲,4-异丙基氨基脲,4-4-二乙基氨基脲和咔唑基吗啉。 低于400°F也需要催化剂。

    Prevention of corrosion in aqueous solutions
    3.
    发明授权
    Prevention of corrosion in aqueous solutions 失效
    防止水溶液腐蚀

    公开(公告)号:US4399098A

    公开(公告)日:1983-08-16

    申请号:US303964

    申请日:1981-09-21

    IPC分类号: C23F11/14 C23F11/06

    CPC分类号: C23F11/148

    摘要: A method for treating water to retard corrosion due to dissolved oxygen, especially boiler feed waters and boiler water condensates, is disclosed. Semicarbazide and its salts are highly effective oxygen scavengers for use in aqueous systems and thereby effect reduction of corrosion resulting from dissolved oxygen.

    摘要翻译: 公开了一种处理水以延缓由于溶解氧引起的腐蚀的方法,特别是锅炉给水和锅炉水冷凝物。 氨基脲及其盐是用于水性体系的高效氧清除剂,从而降低由溶解氧引起的腐蚀。

    Corrosion protection material and method, and use thereof for
aluminumalloys
    6.
    发明授权
    Corrosion protection material and method, and use thereof for aluminumalloys 失效
    防腐蚀材料及方法,以及铝合金的使用

    公开(公告)号:US5688310A

    公开(公告)日:1997-11-18

    申请号:US373235

    申请日:1995-07-06

    摘要: A corrosion protection material and method for anon-metal alloys, particularly light aluminum alloys; the method comprises the steps of coating a material to be protected with a layer containing a chromium-free inhibitor, comprising at least one dihydroxyazoic salt having structural unit (a), wherein Y is a salt producing anion and M is a metal; for the same number of moles, protection with an effectiveness comparable to that of chromate inhibitors may thus be achieved; ##STR1##

    摘要翻译: PCT No.PCT / FR93 / 00685 Sec。 371 1995年1月6日第 102(e)日期1995年1月6日PCT提交1993年7月2日PCT公布。 公开号WO94 / 01501 日期1994年1月20日一种防锈材料和方法,用于肛门金属合金,特别是轻质铝合金; 该方法包括以下步骤:用含有无铬抑制剂的层涂覆待保护的材料,该层包含至少一种具有结构单元(a)的二羟基氮杂环,其中Y是产生盐的阴离子,M是金属; 对于相同的摩尔数,可以实现与铬酸盐抑制剂相当的效力的保护; (一)