Corrosion behaviour and galvanic coupling of titanium and welded titanium in LiBr solutions

被引：34
|
作者：
Blasco-Tamarit, E. [1 ]
Igual-Munoz, A. [1 ]
Garcia Anton, J. [1 ]
Garcia-Garcia, D. [1 ]
机构：
[1] Univ Politecn Valencia, Dept Ingn Quim & Nucl, ETSI Ind, E-46071 Valencia, Spain
来源：
CORROSION SCIENCE | 2007年 / 49卷 / 03期
关键词：
titanium; polarization; welding; passivity;
D O I：
10.1016/j.corsci.2006.07.007
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Corrosion resistance and galvanic coupling of Grade 2 commercially pure titanium in its welded and non-welded condition were systematically analyzed in LiBr solutions. Galvanic corrosion was evaluated through two different methods: anodic polarization (according to the Mixed Potential Theory) and electrochemical noise (using a zero-resistance ammeter). Samples have been etched to study the microstructure. The action of lithium chromate as corrosion inhibitor has been evaluated. Titanium and welded titanium showed extremely low corrosion current densities and elevated pitting potential values (higher than 1 V). The results of both methods, anodic polarization and electrochemical noise, showed that the welded titanium was always the anodic element of the pair titanium-welded titanium, so that its corrosion resistance decreases due to the galvanic effect. (c) 2006 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1000 / 1026
页数：27
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