Patents by Inventor Frank F.-Y. Lu

Frank F.-Y. Lu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Transient technique to determine solution resistance for simple and accurate corrosion rate measurements
    Patent number: 5448178
    Abstract: An apparatus and a method are provided for determining solution resistance and corrosion rate of a metal surface contained in a solution such as an electrode. The signal is applied to the metal surface of interest and the current response is monitored from the applied signal. A peak detector is provided for detecting the peak of the current response. From the peak, the resistance of the solution is ascertained. Following independent determination of the solution resistance, polarization resistance of the metal surface in the solution may be determined. The corrosion rate of the metal surface may be calculated from the polarization resistance.
    Type: Grant
    Filed: November 5, 1993
    Date of Patent: September 5, 1995
    Assignee: Nalco Chemical Company
    Inventors: Tzu-Yu Chen, Frank F.-Y. Lu, Martin R. Godfrey
  • Method of monitoring and controlling corrosion inhibitor dosage in aqueous systems
    Patent number: 5278074
    Abstract: The concentration of an aromatic azole corrosion inhibitor in the water of an aqueous system is monitored by a fluorometric method which is based upon the measurement of the fluorescence intensity of the aromatic azole corrosion inhibitor itself, and the precise determination of concentration permits control of the dosage of such aromatic azole corrosion inhibitor.
    Type: Grant
    Filed: April 22, 1992
    Date of Patent: January 11, 1994
    Assignee: Nalco Chemical Company
    Inventors: Narasimha M. Rao, Frank F.-Y. Lu, John E. Hoots