Premium
Using thionates for noise eperiments – a reasonable combination?
Author(s) -
Ritter S.,
Dorsch T.,
Kilian R.
Publication year - 2004
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.200403816
Subject(s) - electrochemical noise , inert , tetrathionate , platinum , materials science , sulfur , noise (video) , metallurgy , electrochemistry , intergranular corrosion , electrode , corrosion , chemistry , catalysis , computer science , thiosulfate , biochemistry , image (mathematics) , organic chemistry , artificial intelligence
The detection of intergranular corrosion (IGC) initiation of austenitic stainless steel (AISI 347) coupon specimens was investigated using electrochemical noise (EN) measurements. The tests were performed in acidic sodium tetrathionate (Na 2 S 4 O 6 ) solution. The IGC initiation in tetrathionate solution could not be clearly detected by the electrochemical potential noise signal due to interferences of the noise signal with chemical processes which occurred in the test solution. This was confirmed by tests with inert platinum specimens. It was concluded that EN results obtained by tests in thionate or comparable sulfur containing solutions should be regarded with great care and verified, e.g., by tests with inert specimens.