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Proceedings Paper

Modern procedures for chemical cleaning of corroded carbon steel equipment
Author(s): Ileana-Hania Plonski; Stefania-Floriana Spiridon; Maria Robu; Carmen Doman; Mariana Tudorache; Mihaela Bobu; Emilian Mateescu; Frank Schneider
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Paper Abstract

Modern procedures have been elaborated taking into account the laboratory findings and developments of the past two decades concerning the factors increasing the solubility of iron oxides in the cleaning agent and conditioning improving the characteristics of the protective layer, both having in mind the present state of corrosion in romanian power energetic plants. The basic reagent formulae consists in citric acid, hydro-chloric acid, ferrous sulfate as dissolution activator and a corrosion inhibitor, operating at T 80-85 degrees C. The removal of thick corrosion deposits is achieved in a basic step-by-step procedure, the number of steps depending on the layer thickness and on the degree of damage of the underlying base metal. After chemical cleaning, a passive magnetic film will be formed under special conditioning of water with long-chained amines.

Paper Details

Date Published: 23 February 2000
PDF: 6 pages
Proc. SPIE 4068, SIOEL '99: Sixth Symposium on Optoelectronics, (23 February 2000); doi: 10.1117/12.378719
Show Author Affiliations
Ileana-Hania Plonski, Institute of Optoelectronics (Romania)
Stefania-Floriana Spiridon, Institute of Optoelectronics (Romania)
Maria Robu, Institute of Optoelectronics (Romania)
Carmen Doman, S. C. Thermoelectrica SA (Romania)
Mariana Tudorache, S. C. Thermoelectrica SA (Romania)
Mihaela Bobu, S. C. Thermoelectrica SA (Romania)
Emilian Mateescu, S. C. Thermoelectrica SA (Romania)
Frank Schneider, Institute of Solid State and Material Research (Germany)


Published in SPIE Proceedings Vol. 4068:
SIOEL '99: Sixth Symposium on Optoelectronics
Teodor Necsoiu; Maria Robu; Dan C. Dumitras, Editor(s)

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