MONOCARBOXYLIC ACID BASED ANTIFREEZE COMPOSITION FOR DIESEL ENGINES
    4.
    发明公开
    MONOCARBOXYLIC ACID BASED ANTIFREEZE COMPOSITION FOR DIESEL ENGINES 有权
    FROSTSCHUTZMITTELFÜRDIESELMOTOREN AUF DER BASIS VONMONOCARBONSÄUREN

    公开(公告)号:EP1159372A4

    公开(公告)日:2005-03-16

    申请号:EP00913616

    申请日:2000-02-25

    Applicant: ASHLAND INC

    CPC classification number: C23F11/08 C09K5/20

    Abstract: The present invention relates to an acid based antifreeze coolant formulation for heavy duty applications such as for diesel engines which may be used for inhibition and prevention erosion and corrosion of aluminum and the corrosion of other metals exposed to an aqueous liquid in automotive coolant systems. The formulation further inhibits mineral scale. It may be packaged as an ethylene glycol based additive for use in new engines or in a concentrated inhibition package as an additive as for reinhibition of used coolant. The combination of a mixture of ethylene or propylene glycol, a monobasic aliphatic organic acid, azoles, low levels of molybdates, a combination of nitrite and/or nitrate salts, polyvinylpyrrolidone, a hydroxide salt, silicates and/or siloxane stabilized silicates with transition metal compounds provide a synergistic protective effect against the cavitation corrosion of aluminum in aqueous liquids reducing the corrosion rate and is effective at relatively low concentrations and varying pH ranges.

    Abstract translation: 本发明涉及用于重型应用的酸性防冻剂冷却剂配方,例如用于柴油发动机,其可用于抑制和防止铝的侵蚀和腐蚀以及暴露于汽车冷却剂系统中的含水液体的其它金属的腐蚀性 。 该制剂进一步抑制矿物垢。 它可以作为用于新发动机的乙二醇基添加剂或作为添加剂的浓缩抑制包装包装,用于重新抑制用过的冷却剂。 乙烯或丙二醇的混合物,一元脂族有机酸,唑类,低水平的钼酸盐,亚硝酸盐和/或硝酸盐的组合,聚乙烯吡咯烷酮,氢氧化物盐,硅酸盐和/或硅氧烷稳定化的硅酸盐与过渡金属的组合 compoun ds对水溶液中铝的气穴腐蚀提供协同的保护作用,降低腐蚀速率,并且在相对低的浓度和不同的pH范围内是有效的。

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