Effect of palladium on the corrosion behavior of titanium

被引：82

作者：

Brossia, CS ^{[1
]}

Cragnolino, GA ^{[1
]}

机构：

[1] Ctr Nucl Waste Regulatory Anal, SW Res Inst, San Antonio, TX 78238 USA

来源：

CORROSION SCIENCE | 2004年 / 46卷 / 07期

关键词：

titanium; palladium; fluoride; hydrogen evolution; pitting corrosion; crevice corrosion; passive corrosion;

D O I：

10.1016/j.corsci.2003.10.003

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effects of palladium (Pd) additions on the localized and uniform corrosion of titanium (Ti) were examined by comparing the corrosion behavior of Ti Grade 2 (UNS R50400) to that of Pd-bearing Ti Grade 7 (UNS R52400). Pd additions were found to increase the pitting (E-pit) and repassivation (E-rp) potentials such that E-pit for Ti Grade 2 was significantly lower than E-rp for Grade 7 in chloride (Cl-) solutions. The effect of Pd on Ti can be explained through the effects Pd has on the hydrogen evolution reaction. Though Pd additions did significantly affect the localized corrosion resistance of Ti, Pd did not appear to influence the passive corrosion rate nor did it mitigate the deleterious effects of fluoride (F-). Fluoride was found to dramatically increase the measured corrosion current above a critical concentration of about 0.5 mM. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：1693 / 1711

页数：19

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