Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/7732
Title: Effect of temperature, pH and sulphide on the cavitation erosion behaviour of super duplex stainless steel
Authors: Kwok, CT
Man, HC 
Leung, LK
Keywords: Austenitic stainless steel
Cavitation erosion
pH
Sulphide
Super duplex stainless steel
Temperature
Issue Date: 1997
Source: Wear, 1997, v. 211, no. 1, p. 84-93 How to cite?
Journal: Wear 
Abstract: Cavitation erosion characteristics of super duplex stainless steel UNS S32760 in 3.5% NaCl solution with controlled temperature, pH value and sulphide content have been studied by means of a 20 kHz ultrasonic vibrator at a peak-to-peak amplitude of 50 μm. The erosion behaviour was compared with that of austenitic stainless steel UNS S30400. It was found that the mean depth of penetration rate (MDPR) for S32760 and S30400 initially increased with temperature from 10°C to 50°C, and reached a maximum at about 50°C and then decreased with further increase in temperature to 70°C. Results of MDPR versus pH at 23°C indicated that S32760 is more sensitive to change of pH than is S30400 at 23°C. Also, there exists a minimum MDPR at pH 9 for S32760. For S30400 and S32760 in 3.5% NaCl solution with various sulphide concentrations, the MDPR increased gradually as sulphide concentration was increased. S30400 was found to be more sensitive than S32760 to the effect of sulphide on cavitation erosion. The cavitation erosion behaviour of S32760 at varying temperature, pH and sulphide content is explained with the aid of polarisation studies.
URI: http://hdl.handle.net/10397/7732
ISSN: 0043-1648
DOI: 10.1016/S0043-1648(97)00072-0
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