Nalco Chemical Company

Tzu-Yu Chen

Martin R Godfrey

Frank F-y Lu

Carol B Batton

Christopher C Towery

A corrosion inhibiting composition for use in inhibiting corrosion of metallic surfaces, the composition comprising a first surfactant wherein the first surfactant includes at least one sorbitan fatty acid ester and a second surfactant wherein the second surfactant includes at least one polyoxyethylene derivative of a sorbitan fatty acid ester.

Corrosion inhibitor

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.

Transient technique to determine solution resistance for simple and

An apparatus and method for measuring metal corrosion rate in solutions, including solutions having low ionic strength. Three electrodes including a counterelectrode, a reference electrode, and a working metal electrode are dispossed in close proximity to each other and an ion conducting, but electrically insulating, material is provided between at least the reference and working metal electrodes. The ion conducting material provides a pathway for ions to travel between the electrodes other than through the solution without also creating a short circuit between the elctrodes.

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Naperville, IL, United States of America

Tzu-Yu Chen