A Contribution to the Acid Cleaning of Boilers
β Scribed by G. Trabanelli; F. Zucchi; A. Frignani; M. Zucchini; V. Regis; G. Rocchini
- Publisher
- John Wiley and Sons
- Year
- 1979
- Tongue
- German
- Weight
- 723 KB
- Volume
- 30
- Category
- Article
- ISSN
- 0947-5117
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β¦ Synopsis
Abstract
The dissolution rates of various types of magnetites are measured by a spectrophotometric technique allowing the determination of Fe^3+^/Fe^2+^ ratio as a function of time. Some tests are also performed on magnetite electrodes galvanically coupled to steel electrodes.
The influence of copper on the dissolution rate of magnetite is evaluated and the effect due to the presence of organic corrosion inhibitors is determined.
A circulating loop operating with some boiler tube electrodes was assembled in order to verify the possibility of monitoring the acid cleaning treatment by electrochemical measurements.
Electrode potentialβtime curves, polarization curves and polarization resistance data are recorded; the calculated corrosion rates are compared to weightβloss data obtained in the same experimental conditions.
From the overall results some conclusions are reached both on the dissolution process of magnetite and on the monitoring of the acid cleaning treatment.
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