Method and apparatus for measuring underdeposit localized corrosion rate or metal corrosion rate under tubercles in cooling water systems
US5275704A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 16, 1992 |
| Grant date | Jan 4, 1994 |
| Priority date | — |
| Expiry date | Oct 16, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N17/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.