< back to main site

Publications

Electrochemical polarisation measurements on a 12Cr martensitic stainless steel in dilute NaCl.

Guo, L; Zhou, S; Turnbull, A (2016) Electrochemical polarisation measurements on a 12Cr martensitic stainless steel in dilute NaCl. NPL Report. MAT 84

[img] Text
MAT84.pdf

Download (661kB)

Abstract

Electrochemical polarisation tests were carried out to provide input data to the model of crack chemistry being developed for a 12Cr martensitic stainless steel (FV566) in simulated steam turbine solutions. Potentiodynamic tests with two sweep rates and potentiostatic tests were used to characterise the passive current density of FV566 in neutral NaCl solution at 90 ºC with chloride ion concentration of 1000 ppm. The method chosen affected the passive current density obtained. Expressions were obtained for the water reduction kinetics in deaerated neutral solutions and for hydrogen ion reduction kinetics in deaerated acidic solutions of varying pH. The depassivation pH of FV566, measured in deaerated solutions with ~2000 ppm Cl-, was found to be between 1.7 and 1.9.

Item Type: Report/Guide (NPL Report)
NPL Report No.: MAT 84
Subjects: Advanced Materials
Advanced Materials > Corrosion
Last Modified: 02 Feb 2018 13:13
URI: http://eprintspublications.npl.co.uk/id/eprint/7275

Actions (login required)

View Item View Item