Corrosion Mechanism in Artificial Sweat Solution of In-Bearing White Bronze Alloy

被引：15
作者：
Caporali, S. [1 ,2 ]
Bardi, U. [1 ,2 ]
机构：
[1] Univ Firenze, Dept Chem, I-50019 Sesto Fiorentino, FI, Italy
[2] Consorzio Interuniv Nazl Sci & Tecnol Mat INSTM, I-50147 Florence, FI, Italy
来源：
CORROSION | 2012年 / 68卷 / 02期
关键词：
artificial sweat; coating; copper; crevice corrosion; electrochemical impedance spectroscopy; generalized corrosion; indium; pitting; tin; white bronze; x-ray photoelectron spectroscopy; zinc; CU-18NI-20ZN NICKEL-SILVER; METAL-ION RELEASE; UNITED-STATES; COPPER; ALLERGY; RESISTANCE; CHROMIUM; COATINGS; POPULATION; IMMERSION;
D O I：
10.5006/1.3683223
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Corrosion properties of thin layers of a copper-tin-zinc-indium alloy ("white bronze") were investigated in an artificial sweat solution indicating poor resistance properties. The coating degraded via pitting, generalized, and crevice corrosion, as evidenced by scanning electron microscopy-energy-dispersive x-ray analysis (SEM-EDX) investigation. The corrosion mechanism was investigated in situ by means of electrochemical impedance spectroscopy (EIS), and ex situ by x-ray photoelectron spectroscopy (XPS). These combined results demonstrate that the key point of the corrosion failure is the removal of the passive In-Sn oxides.
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页数：8
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