<abstract xmlns="http://www.w3.org/1999/xhtml"> SO3-Ph-BTBP is a hydrophilic tetra-N-dentate ligand proposed for An(III)/Ln(III) separation by solvent extraction, and a candidate for use in future advanced reprocessing schemes such as GANEX and SANEX. We present the first study of the effect of SO3-Ph-BTBP on the corrosion behavior of stainless steels. Specifically, studies have been performed using steels and conditions equivalent to those found in relevant nuclear reprocessing flow sheets. SO3-Ph-BTBP has been shown to have little effect on either steel passivation or reductive dissolution. However, if driven cathodically into a region of hydrogen evolution at the electrode surface or conversely anodically into a region of transpassive dissolution, observed currents are reduced in the presence of SO3-Ph-BTBP, suggesting corrosion inhibition of the steel potentially through weak absorption of a SO3-Ph-BTBP layer at the metal-solution interface. The lack of any observed corrosion acceleration via complexation of Fe3+ is surprising and has been suggested to be due to the slow extraction kinetics of SO3-Ph-BTBP as a result of a requirement for a trans- to cis-conformational change before binding.</abstract>

SO3-Ph-BTBP is a hydrophilic tetra-N-dentate ligand proposed for An(III)/Ln(III) separation by solvent extraction, and a candidate for use in future advanced reprocessing schemes such as GANEX and SANEX. We present the first study of the effect of SO3-Ph-BTBP on the corrosion behavior of stainless steels. Specifically, studies have been performed using steels and conditions equivalent to those found in relevant nuclear reprocessing flow sheets. SO3-Ph-BTBP has been shown to have little effect on either steel passivation or reductive dissolution. However, if driven cathodically into a region of hydrogen evolution at the electrode surface or conversely anodically into a region of transpassive dissolution, observed currents are reduced in the presence of SO3-Ph-BTBP, suggesting corrosion inhibition of the steel potentially through weak absorption of a SO3-Ph-BTBP layer at the metal-solution interface. The lack of any observed corrosion acceleration via complexation of Fe3+ is surprising and has been suggested to be due to the slow extraction kinetics of SO3-Ph-BTBP as a result of a requirement for a trans- to cis-conformational change before binding.

The effect of SO3-Ph-BTBP on stainless steel corrosion in nitric acid

The LRF Centre for Nuclear Engineering, Engineering Department, Lancaster University, Bailrigg, Lancashire, LA1 4YR, United Kingdom, Tel.: +44(0)1524 593109

The LRF Centre for Nuclear Engineering, Engineering Department, Lancaster University, Bailrigg, Lancashire, LA1 4YR, United Kingdom, Tel.: +44(0)1524 593109,

Nukleonika

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

The effect of SO-Ph-BTBP on stainless steel corrosion in nitric acid

SO3-Ph-BTBP is a hydrophilic tetra-N-dentate ligand proposed for An(III)/Ln(III) separation by solvent extraction, and a candidate for use in future advanced...

The effect of SO₃-Ph-BTBP on stainless steel corrosion in nitric acid

Published Online: Dec 30, 2015

Page range: 865 - 869

Received: Jun 19, 2015

Accepted: Aug 21, 2015

DOI: https://doi.org/10.1515/nuka-2015-0117

Keywords
corrosion, stainless steel, electrochemistry, 6,6ʹ-bis(1,2,4-triazin-3-yl)-2,2ʹ-bipyridine

© by Colin Boxall

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

The effect of SO3-Ph-BTBP on stainless steel corrosion in nitric acid

Published Online: Dec 30, 2015

Page range: 865 - 869

Received: Jun 19, 2015

Accepted: Aug 21, 2015

DOI: https://doi.org/10.1515/nuka-2015-0117

Keywordscorrosion, stainless steel, electrochemistry, 6,6ʹ-bis(1,2,4-triazin-3-yl)-2,2ʹ-bipyridine

© by Colin Boxall

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

The effect of SO₃-Ph-BTBP on stainless steel corrosion in nitric acid

Keywords
corrosion, stainless steel, electrochemistry, 6,6ʹ-bis(1,2,4-triazin-3-yl)-2,2ʹ-bipyridine