Chemistry: electrical and wave energy – Processes and products – Processes of treating materials by wave energy
Patent
1992-10-16
1994-01-04
Weisstuch, Aaron
Chemistry: electrical and wave energy
Processes and products
Processes of treating materials by wave energy
204404, G01N 2726
Patent
active
052757048
ABSTRACT:
A method and apparatus is provided for measuring underdeposit localized corrosion rate of a metal structure under differential flow conditions encountered in actual cooling water systems. A first electrode defining a slow flow electrode is immersed in an electrolytic liquid. A second electrode defining a fast flow electrode is also immersed in the electrolytic liquid. Different fluid dynamic conditions are created on the slow flow and fast flow electrodes. There are three (3) techniques for obtaining measurement from a differential flow cell so as to determine the underdeposit localized corrosion rate due to differential flow conditions. In one embodiment, the different fluid dynamic conditions are created by rotating the slow flow electrode at a first speed and by rotating the fast flow electrode at a second speed which is higher than the first speed.
REFERENCES:
patent: 3660249 (1972-05-01), Townsend
patent: 3878064 (1975-04-01), Weisstuch et al.
patent: 4395318 (1983-07-01), Tait et al.
patent: 4994159 (1991-02-01), Agarwaza et al.
patent: 5045775 (1991-09-01), White et al.
Barrett Joseph B.
Drake James J.
Miller Robert A.
Nalco Chemical Company
Weisstuch Aaron
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