Electrolysis: processes – compositions used therein – and methods – Electrolytic analysis or testing – Tracking chemical reactions
Reexamination Certificate
2005-09-13
2005-09-13
Olsen, Kaj K. (Department: 1753)
Electrolysis: processes, compositions used therein, and methods
Electrolytic analysis or testing
Tracking chemical reactions
C204S434000, C205S794000, C073S061620, C073S061750
Reexamination Certificate
active
06942782
ABSTRACT:
A method and apparatus for measuring the deposit forming propensity of a continuously flowing fluid having a bulk pH of about 1 to about 12 comprising measuring the rate at which deposit forms on a quartz crystal microbalance having a top side comprising a working electrode in contact with the fluid and a bottom side isolated from the fluid, wherein the pH of the fluid proximate to the microbalance is controlled electrochemically at about 1 to about 14 by applying to the working electrode a cathodic current of about −0.001 to about −100 mA/cm2or an anodic current of from about 0.001 to about 100 mA/cm2and wherein the working electrode is coated with or made of a conductive material on which the rate of hydrogen gas evolution is at least 10 times lower than on a gold cathode in acidic solution.
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Duggirala Prasad Y.
Kouznetsov Dmitri L.
Shevchenko Sergey M.
Breininger Thomas M.
Martin Michael B.
Nalco Company
Olsen Kaj K.
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