Patents Assigned to Great Wall Lubricating Oil Application Research Center Co. Ltd.
  • Method for increasing stability of cooling fluid for engine
    Patent number: 7244372
    Abstract: The present invention relates to a method for increasing the stability of cooling fluid for the engine. This invention selects the most preferred conditions, e.g. the composition of the solution, pH value, means and amount of addition, and proportion of silicate added, so that the products thereof have excellent properties for inhibiting corrosion for many kinds of metals, being with low costs and good storage stability. Moreover, since this method is simple, it is easy to be put into practice and utilized.
    Type: Grant
    Filed: May 11, 2005
    Date of Patent: July 17, 2007
    Assignee: Great Wall Lubricating Oil Application Research Center Co. Ltd.
    Inventors: Chunhui Zhang, Kaijiao Zhang, Jianfeng Guo, Wanying Li, Yunchang Song, Bing Yang