Protection of beryllium metal against microbial influenced corrosion using silane self-assembled monolayers

被引:0
作者
Rajendra U. Vaidya
Alina Deshpande
Larry Hersman
Susan M. Brozik
Darryl Butt
机构
[1] Los Alamos National Laboratory,Materials Science Division
[2] Los Alamos National Laboratory,Life Sciences Division
[3] Los Alamos National Laboratory,Nuclear Materials Technology Division
[4] the Sandia National Laboratory,undefined
[5] Ceramatec,undefined
来源
Metallurgical and Materials Transactions A | 1999年 / 30卷
关键词
Material Transaction; Beryllium; Alamos National Laboratory; Failure Strength; Uncoated Sample;
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摘要
The effectiveness of a self-assembled silane monolayer as protection for beryllium against microbiologically influenced corrosion (MIC) was demonstrated. Four-point bend tests on coated and uncoated beryllium samples were conducted after microbiological exposures, and the effectiveness of these coatings as MIC protection was reported through mechanical property evaluations. Application of the silane monolayer to the beryllium surfaces was found to prevent degradation of the failure strength and displacement-to-failure of beryllium in bending. In contrast, the uncoated beryllium samples exhibited a severe reduction in these mechanical properties in the presence of the marine Pseudomonas bacteria. The potentiodynamic measurements showed that both the uncoated and coated samples pitted at the open-circuit potential. However, the size and distribution of the corrosion pits formed on the surface of the beryllium samples were significantly different for the various cases (coated vs uncoated samples exposed to control vs inoculated medium). This study demonstrates the following: (1) the deleterious effects of MIC on the mechanical properties of beryllium and (2) the potential for developing fast, easy, and cost-effective MIC protection for beryllium metal using silane self-assemblies.
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页码:2129 / 2134
页数:5
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