Synchrotron X-ray radiography studies of pitting corrosion of stainless steel: Extraction of pit propagation parameters

被引：82

作者：

Ghahari, Majid ^{[1
]}

Krouse, Donal ^{[2
]}

Laycock, Nicholas ^{[1
]}

Rayment, Trevor ^{[1
,3
]}

Padovani, Cristiano ^{[4
]}

Stampanoni, Marco ^{[5
,6
]}

Marone, Federica ^{[5
]}

Mokso, Rajmund ^{[5
]}

Davenport, Alison J. ^{[1
]}

机构：

[1] Univ Birmingham, Coll Engn & Phys Sci, Birmingham B15 2TT, W Midlands, England

[2] Callaghan Innovat, Lower Hutt 5040, New Zealand

[3] Diamond Light Source Ltd, Didcot, Oxon, England

[4] Nucl Decommissioning Author, Radioact Waste Management Directorate, Moor Row, Cumbria, England

[5] Paul Scherrer Inst, Swiss Light Source, CH-8048 Zurich, Switzerland

[6] Univ Zurich, Inst Biomed Engn, Zurich, Switzerland

来源：

CORROSION SCIENCE | 2015年 / 100卷

基金：

英国工程与自然科学研究理事会;

关键词：

Stainless steel; Pitting corrosion; Kinetic parameters; Galvanostatic; Potentiostatic; Electrochemical calculation; FORMED SALT FILMS; LOCALIZED CORROSION; REPASSIVATION KINETICS; TRANSPORT PROCESSES; ANODIC-DISSOLUTION; GROWTH; IRON; TEMPERATURE; STABILITY; ALLOYS;

D O I：

10.1016/j.corsci.2015.06.023

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In situ synchrotron X-ray radiography was used to observe the evolution of 2D pits growing at the edge of stainless steel foils in chloride solutions of varying concentrations under current and potential control. A method was developed for measuring the local anodic current density along the perimeter of pits from the rate of advance of the pit into the metal. Pit depth tends to increase with time with kinetics consistent with diffusion control (under a salt layer), whereas lateral development (on film-free surfaces) is influenced by solution conductivity. Perforated covers formed on pits control their growth and stability. (C) 2015 The Authors. Published by Elsevier Ltd.

引用

页码：23 / 35

页数：13

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