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Anticorrosion coating of the walls of metal pipes by digital growth of aluminum oxide

Published online by Cambridge University Press:  29 June 2016

Koji Sugioka
Affiliation:
Riken, The Institute of Physical and Chemical Research, Wako, Saitama, 351-01, Japan
Jia-Fa Fan
Affiliation:
Riken, The Institute of Physical and Chemical Research, Wako, Saitama, 351-01, Japan
Koichi Toyoda
Affiliation:
Riken, The Institute of Physical and Chemical Research, Wako, Saitama, 351-01, Japan
Hiromichi Waki
Affiliation:
Tokyo Denki University, Faculty of Engineering, 2-2, Kanda-nishi-cho, Chiyoda-ku, Tokyo, 101, Japan
Hiroshi Takai
Affiliation:
Tokyo Denki University, Faculty of Engineering, 2-2, Kanda-nishi-cho, Chiyoda-ku, Tokyo, 101, Japan
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Abstract

The chemical stability of the surface of metals, such as aluminum and stainless steel (SUS304), exposed to acid solutions is remarkably improved by the digital growth of Al2O3 using the sequential surface chemical reaction of trimethylaluminum (TMA) and water vapor. Samples thus coated with Al2O3 thin films were not etched by 1 N HCl or 1 N H2SO4 completely, and no change in the surface morphology was observed by these immersion tests. By the quantitative verification of polarization measurement in 1 N HCl and 1 N H2SO4, the polarization resistance was estimated to be 1.4 × 101–5.18 × 103 times that of noncoated samples. Anticorrosion coating of SUS304 pipe walls was also demonstrated.

Type
Articles
Copyright
Copyright © Materials Research Society 1992

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References

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