๐”– Bobbio Scriptorium
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Electrochemical monitoring of the process of boiler cleaning

โœ Scribed by A.M. Shams El Din; A.M.K. Tag El Din

Publisher
Elsevier Science
Year
1989
Tongue
English
Weight
615 KB
Volume
75
Category
Article
ISSN
0011-9164

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โœฆ Synopsis

New boilers first introduced into service and old boilers coming from overhaul receive a cleaning process involving an acid wash and a surface passivation process. Both operations are prone to be followed out electrochemically. The conditions for obtaining a clean met.31 surface through treatment with citric acid solutions are examined. The effects of temperature. time of treatment and of surface oxidation on the open circuit potentials of steel coupons are established. Passivation of the clean surface with H202 and NilNO is studied and the threshold of concentration necessary for inhibition is determined. The stability of the passive films and their susceptibility to pitting attack by Cl-ion are compared.

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