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Corrosion and Inhibition Tests on copper‐base alloy tubes in flowing conditions
Author(s) -
Zucchi F.,
Brunoro G.,
Trabanelli G.
Publication year - 1977
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.19770281206
Subject(s) - corrosion , copper , polarization (electrochemistry) , materials science , corrosion monitoring , electrode , alloy , base metal , metallurgy , corrosion inhibitor , metal , chemistry , welding
A corrosion loop has been asembled to study the behaviour of CuZn15, CuZn29Sn1, CuZn22Al2 tubes in flowing synthetic seawater. The apparatus allowed to carry out electrode potential measurements and to record the polarization resistance on tube electrodes. Moreover, by using a pulse technique of photopotential determination, it was possible to observe “in situ” the modification of surface layers of oxides or of corrosion products in the various experimental conditions. The paper discusses some results concerning: a) the action of thebenzimidazole‐2‐thiol organic inhibitor; b) the influence of the surface state of the metallic material on the action of the inhibitor; c) the influence of polluting agent (S 2− ) or a prefilming treatment on the inhibitor efficiency; d) the possibility of corrosion monitoring by linear polarization measurements.