Abstract
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.
Similar content being viewed by others
References
M.A. Hill, D.P. Butt, and R.S. Lillard: J. Electrochem. Soc., 1998, vol. 145, p. 2799.
J.L. English: in The Metal Beryllium, D.W. White, Jr. and J.E. Burke, eds. ASM, Cleveland, OH, 1955, p. 530.
D.J. Levy: “The Electrolytic Polarization of Beryllium,” LMSC-6-90-61-75, Lockheed Missiles and Space Division, Sunnyvale, CA, Nov. 1961.
D.E. Williams, C. Westcott, and M. Fleischmann: J. Electrochem. Soc., 1985, vol. 132, p. 1796.
T. Shibata and T. Takeyama: Nature, 1976, vol. 260, p. 315.
R.U. Vaidya, M.A. Hill, M. Hawley, and D.P. Butt: Metall. Mater. Trans. A, 1998, vol. 29A, p. 2753.
Los Alamos National Laboratory Report No. LAUR 97-0859, Los Alamos National Laboratory, Los Alamos, NM.
Los Alamos National Laboratory Report No. LAUR 97-3164, Los Alamos National Laboratory, Los Alamos, NM.
Los Alamos National Laboratory Report No. LAUR 97-4027, Los Alamos National Laboratory, Los Alamos, NM.
D. Walsh, D.H. Pope, M. Danford, and T. Huff: J. Met., 1993, vol. 9, p. 22.
Microbiologically Influenced Corrosion, G. Kobrin, ed., NACE International, Houston, TX, 1993.
J. Stoeker: Mater. Perf., 1984, vol. 23, p. 48.
R.E. Tatnall: Mater. Perf., 1981, vol. 20, p. 41.
R.E. Tatnall, J. Stoeker, R. Schultz, G. Kobrin, and A. Piluso: Mater. Perf., 1981, vol. 19, p. 41.
G. Kobrin: Mater. Perf., 1976, vol. 15, p. 38.
E. Bennett: Lubrication Eng., 1972, vol. 7, p. 16.
R.U. Vaidya, L.E. Hersman, A.K. Zurek, D.P. Butt, and K.S. Laurinavichius: Corr. Prev. Control, 1996, vol. 43(4), p. 101.
R.U. Vaidya, D.P. Butt, L.E. Hersman, and A.K. Zurek: Corr. J., 1997, vol. 53, p. 136.
W.J. van Ooij and T. Child: Chem. Technol., 1998, vol. 2, p. 26.
D.H. Pope, D. Duquette, P.C. Wayner, Jr., and A.H. Johannes: MTI Publication No. 13, NACE, Houston, TX, 1989.
R.U. Vaidya, D.P. Butt, L.E. Hersman, and A.K. Zurek: Corr. Rev., 1997, vol. 15(3–4), p. 387.
T. Nakagawa and K. Ogawa: Langmuir, 1994, vol. 10, p. 525.
X. Feng, G.E. Fryxell, L.Q. Wang, A.Y. Kim, J. Liu, and K.M. Kemner: Science, 1997, vol. 276, p. 923.
S. Brozik: Los Alamos National Laboratory, Los Alamos, NM personal communication, 1998.
M.A. Hill and J. Lillard: Los Alamos National Laboratory, Los Alamos, NM personal communication, 1998.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Vaidya, R.U., Deshpande, A., Hersman, L. et al. Protection of beryllium metal against microbial influenced corrosion using silane self-assembled monolayers. Metall Mater Trans A 30, 2129–2134 (1999). https://doi.org/10.1007/s11661-999-0024-x
Received:
Issue Date:
DOI: https://doi.org/10.1007/s11661-999-0024-x