公开(公告)号：US20040227124A1

公开(公告)日：2004-11-18

申请号：US10755713

申请日：2004-01-12

Applicant: ASHLAND INC.

Inventor： David E. Turcotte ,  Michael A. Dituro ,  Arnold L. Coffey JR. ,  Alden W. Olsen ,  Carl R. Stephens

IPC: C09K005/00

CPC classification number: C23F11/08 ,  C09K5/20

Abstract: The present invention relates to a carboxylic 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 carboxylic organic acid, azoles, low levels of molybdates, a nitrite salt and/or nitrate salt and/or siloxane stabilized silicate, and combinations thereof, polyvinylpyrrolidone, 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羧酸基防冻剂冷却剂制剂，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。 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被包装，用于重新抑制用过的冷却剂。 乙烯或丙二醇的混合物，一元羧酸有机酸，唑类，低水平的钼酸盐，亚硝酸盐和/或硝酸盐和/或硅氧烷稳定的硅酸盐的混合物及其组合，聚乙烯吡咯烷酮的组合​​提供了协同的保护作用 防止铝在水性液体中的气穴腐蚀降低腐蚀速率，并且在相对低的浓度和不同的pH范围内是有效的。