One-bath particle-free chemical cleaning
    1.
    发明申请
    One-bath particle-free chemical cleaning 有权
    单浴无颗粒化学清洗

    公开(公告)号:US20050227878A1

    公开(公告)日:2005-10-13

    申请号:US11099676

    申请日:2005-04-06

    申请人: Magnor Nordaa

    发明人: Magnor Nordaa

    摘要: The invention relates to a method for one-bath chemical cleaning and preservation of interior surfaces of hollow steel bodies) without any organic solvents, comprising controlled change of the liquid bath in that in a circuit of hoses running from a mobile tank equipped with a pump unit and steam generator there is circulated a liquid stream to a defined cavity of steel. The composition of the liquid is changed methodically by the addition of fresh chemical additives until the end of the process. Fresh water at 80° C. has added thereto an alkaline degreasing liquid A containing chlorine-free tensides, which is circulated, whereupon cleaning liquid B, consisting of citric acid with added cationic tensides, is added to a pH of 4.5 and is circulated. There is then added a complexing derusting liquid C, with active modified aminocarboxykate made biologically degradable, with adjustment of the pH to 4.5-5.0 with cleaning liquid B, and extra addition of the complexing agent if derusting liquid C falls below 5% by weight, until the iron content of the liquid is stable. For passivation, a non-ionic passivating and neutralising liquid D, consisting of alkaline degreasing agent and non-ionic, chlorine-free tensides, is added to pH 7.0-7.5, after which there is added 2-4% by weight of inhibiting liquid E, consisting of a chain molecule of a chelate, active at pH >7, which functions as a supplement to the aminocarboxylate. A gluconate with heptanate and silicate provides a diffusion-proof microfilm on the steel surface.

    摘要翻译: 本发明涉及一种没有任何有机溶剂的单浴化学清洗和保存中空钢体内表面的方法,包括控制的液槽变化,即在从装有泵的移动罐运行的软管回路中 单元和蒸汽发生器将液体流循环到限定的钢腔中。 液体的组成通过添加新鲜的化学添加剂而有方式地改变,直到该过程结束。 在80℃的淡水中加入含有无氯表面活性剂的碱性脱脂液体A,该脱脂液体循环,由此将加入阳离子表面活性剂的柠檬酸组成的清洗液B添加至4.5的pH并循环。 然后加入一种络合的除锈液体C,其具有可生物降解的活性改性氨基羧酸酯,并用清洗液B将pH调节至4.5-5.0,如果除油液体C低于5重量%则额外添加络合剂, 直到液体的铁含量稳定。 对于钝化,将由碱性脱脂剂和非离子型无氯表面活性剂组成的非离子钝化和中和液D加入到pH 7.0-7.5中,然后加入2-4重量%的抑制液 E由螯合物的链分子组成,其活性在pH> 7,其用作氨基羧酸盐的补充物。 具有庚酸盐和硅酸盐的葡萄糖酸盐在钢表面提供了防扩散的微缩胶片。

    Removal of fluoride-containing scales using aluminum salt solution
    2.
    发明授权
    Removal of fluoride-containing scales using aluminum salt solution 失效
    使用铝盐溶液去除含氟化合物的垢

    公开(公告)号:US5993558A

    公开(公告)日:1999-11-30

    申请号:US890698

    申请日:1997-07-11

    CPC分类号: C23G1/08 C23G1/10 C23G1/106

    摘要: Fluoride-containing scale can be removed from metal surfaces such as titanium, titanium alloys, nickel alloys, and stainless steel by contacting the metal surfaces with an aqueous salt solution of an inorganic acid, including its hydrates. The cationic portion of the salt can be aluminum, iron and mixtures thereof. The anionic portion of the salt can be a chloride, a nitrate, a sulfate, and mixtures thereof. The contracting occurs in the absence of the addition of an acid, such as hydrochloric, nitric, or sulfuric acid. The presence of the aqueous salt solution with the dissolved fluoride scale does not accelerate or increase the normal rate of metal corrosion that can occur in the absence of the aqueous salt solution or any acidic cleaning agent.

    摘要翻译: 通过使金属表面与包括其水合物的无机酸的盐水溶液接触,可以从金属表面如钛,钛合金,镍合金和不锈钢中除去含氟化合物的垢。 盐的阳离子部分可以是铝,铁及其混合物。 盐的阴离子部分可以是氯化物,硝酸盐,硫酸盐及其混合物。 在没有加入酸如盐酸,硝酸或硫酸的情况下发生收缩。 溶解的氟化物垢的盐水溶液的存在不会加速或增加在不存在盐水溶液或任何酸性清洁剂的情况下可能发生的金属腐蚀的正常速率。

    Molecular level cleaning of contaminants from parts utilizing an
environmentally safe solvent
    4.
    发明授权
    Molecular level cleaning of contaminants from parts utilizing an environmentally safe solvent 失效
    使用环境安全溶剂对部件污染物进行分子级清洁

    公开(公告)号:US5938859A

    公开(公告)日:1999-08-17

    申请号:US894495

    申请日:1997-11-10

    摘要: The invention provides a solvent mixture including n-propyl bromide, a mixture of low boiling solvents and, preferably, a defluxing and/or ionics removing additive and/or at least one saturated terpene. The invention also provides a method of cleaning an article (e.g., an electrical, plastic, or metal part) in a vapor degreaser using the solvent mixture. The solvent mixture of the invention is non-flammable, non-corrosive, and non-hazardous. In addition, it has a high solvency and a very low ozone depletion potential. Thus, using the solvent mixture of the invention, oil, grease, rosin flux, and other organic material can be readily removed from the article of interest in an environmentally safe manner.

    摘要翻译: PCT No.PCT / US97 / 05183 Sec。 371日期:1997年11月10日 102(e)日期1997年11月10日PCT 1997年3月28日PCT公布。 公开号WO98 / 44083 日本1998年10月8日本发明提供了包括正丙基溴,低沸点溶剂和优选脱溶剂和/或离子去除添加剂和/或至少一种饱和萜烯的混合物的溶剂混合物。 本发明还提供了一种使用溶剂混合物在蒸气去油器中清洁制品(例如,电,塑料或金属部件)的方法。 本发明的溶剂混合物是不可燃,非腐蚀性和非危险性的。 此外,它具有很高的偿付能力和极低的臭氧消耗潜力。 因此,使用本发明的溶剂混合物可以以环境安全的方式从感兴趣的物品中容易地除去油,油脂,松香助熔剂和其它有机材料。