Synergistic effect of cavitation erosion and corrosion of various engineering alloys in 3.5% NaCl solution

Kwok, Chi Tat; Cheng, F. T.; Man, Hau Chung

doi:10.1016/s0921-5093(00)00899-6

Cited by 206 publications

(86 citation statements)

References 11 publications

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“…In a study by Kwok, Cheng and Man [22], the synergistic effect of cavitation erosion and corrosion of copper-based alloys and bronze, among many other engineering alloys using an 20 kHz ultrasonic vibrating cavitation at a peak-topeak amplitude of 30 μm in distilled water and in 3.5% NaCl solution at 23 °C was investigated. It was found that synergism had a significant effect on the mass loss with it contributing up to 85% total damage.…”

Section: Synergy Evaluationmentioning

confidence: 99%

Different methods of measuring synergy between cavitation erosion and corrosion for nickel aluminium bronze in 3.5% NaCl solution

Basumatary

Wood

2020

Tribology International

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Section: Synergy Evaluationmentioning

confidence: 99%

Different methods of measuring synergy between cavitation erosion and corrosion for nickel aluminium bronze in 3.5% NaCl solution

Basumatary

Wood

2020

Tribology International

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“…Other articles have studied both mechanical effects as well as the electrochemical factors involved. [16,17] …”

Section: B Cavitation Erosion In Nabmentioning

confidence: 99%

Feasibility Study of Low Force Robotic Friction Stir Process and its Effect On Cavitation Erosion and Electrochemical Corrosion for Ni Al Bronze Alloys

Ahmad

Pan

et al. 2014

Metall Mater Trans B

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Robotic friction stir processing (FSP) has not been widely researched to date. This is perhaps due to the limited force capabilities of industrial robots in comparison with dedicated commercial FSP equipment. When operating a FSP machine, the force used to plunge the tools may range from 5000 to 8000 N which is currently beyond the capability of most robots. However, the capacity of robotic manipulators is increasing, so low force friction stir processing is becoming feasible. The ability of the robot arm to apply a controlled force that is normal to a 3-dimensional surface without the need to reorient the workpiece makes it a very useful tool for FSP of complex components. In this analysis, a robot arm with a capacity of 2500 N is used to improve the surface properties of nickel aluminum bronze (NAB) using low force FSP. Multiple passes were applied to the surface of the test sample for a more consistent spread of the stir zone. The sample was then microhardness tested and demonstrated a 62 pct increase in surface hardness. Cavitation erosion testing of the original and processed surfaces was also performed as per ASTM G-32. The erosion rate of the processed NAB sample was 44 pct of the rate experienced by the original cast NAB sample. Finally, the corrosion potentials of FSP NAB were measured at 45 mV less anodic than the unprocessed material, indicating that the processed material is more noble relative to the cast NAB sample. Robotic friction stir processing (FSP) has not been widely researched to date. This is perhaps due to the limited force capabilities of industrial robots in comparison with dedicated commercial FSP equipment. When operating a FSP machine, the force used to plunge the tools may range from 5000 to 8000 N which is currently beyond the capability of most robots. However, the capacity of robotic manipulators is increasing, so low force friction stir processing is becoming feasible. The ability of the robot arm to apply a controlled force that is normal to a 3-dimensional surface without the need to reorient the workpiece makes it a very useful tool for FSP of complex components. In this analysis, a robot arm with a capacity of 2500 N is used to improve the surface properties of nickel aluminum bronze (NAB) using low force FSP. Multiple passes were applied to the surface of the test sample for a more consistent spread of the stir zone.The sample was then microhardness tested and demonstrated a 62 pct increase in surface hardness. Cavitation erosion testing of the original and processed surfaces was also performed as per ASTM G-32. The erosion rate of the processed NAB sample was 44 pct of the rate experienced by the original cast NAB sample. Finally, the corrosion potentials of FSP NAB were measured at 45 mV less anodic than the unprocessed material, indicating that the processed material is more noble relative to the cast NAB sample.

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“…[4][5][6][7][8] It has been reported that the ultrasound (US), which is widely used for cleaning solid surfaces in liquids, can destroy the passive film on stainless steel and active the corrosion reaction. [9][10][11] On the other hand, the authors also reported that the pitting corrosion on SUS304 stainless steel can be suppressed by the ultrasound while the cathodic and the passive behavior does not change.…”

Section: Introductionmentioning

confidence: 99%

Influence of Ultrasound on Corrosion Behavior of SUS304 Stainless Steel with Crevice

Wang

Koshi

2008

Mater. Trans.

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Anodic polarization on SUS304 stainless steel with crevice was carried out in 3.5 mass% NaCl aqueous solution. After the anodic current density reached i ¼ 10, 12 or 50 A/m 2 , the potential at that moment was held constantly for a prescribed period. When an ultrasound (US) was applied to the specimen through the solution during the holding period of the potential, the current density on the specimen surface was measured and compared to that without the application of US. As a result, both the pitting corrosion and the crevice corrosion were largely suppressed by the application of US in the solution, and the corrosion current density changed almost synchronistically with the cyclic application and the stop of US. The above effect of US on the suppression of corrosion of SUS304 steel is attributed to the decrease or suppression of the enrichment of hydrogen ions and chloride ions in the crevice or the pits by the stirring effect of US.

show abstract

Synergistic effect of cavitation erosion and corrosion of various engineering alloys in 3.5% NaCl solution

Cited by 206 publications

References 11 publications

Different methods of measuring synergy between cavitation erosion and corrosion for nickel aluminium bronze in 3.5% NaCl solution

Different methods of measuring synergy between cavitation erosion and corrosion for nickel aluminium bronze in 3.5% NaCl solution

Feasibility Study of Low Force Robotic Friction Stir Process and its Effect On Cavitation Erosion and Electrochemical Corrosion for Ni Al Bronze Alloys

Influence of Ultrasound on Corrosion Behavior of SUS304 Stainless Steel with Crevice

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