Abstract

The pitting corrosion of SUSU304 steel can be suppressed by the application of a 19.5 kHz ultrasound (US) in 3.5% NaCl aqueous solution. At a constant vibrator-to-specimen distance of d = 76 mm equal to the wavelength, the suppression effect increased with the input power to vibrator and the largest effect was obtained at the power of I = 8. At constant input powers of I = 2 or 8, the suppression effect decreased with the increase in the vibrator-to-specimen distance, but the largest effect was obtained at d = 68 mm in each case of I = 2 and 8.

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