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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
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.
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