Abstract：To explore the effect of corrosion on cavitation erosion, the experiment was performed on corrosion and cavitation erosion of 304 stainless steel samples. Different concentrations of sodium chloride solution were adopted for corrosion. The experiments of cavitation erosion were conducted based on the waterjet cavitation test bench conforming to ASTM G134—95 of standard test method for erosion of solid materials by a cavitating liquid jet. The cavitation erosion characteristics of the 304 austenitic stainless steel samples were comprehensively analyzed according to cumulative mass loss, surface morphology and surface roughness. The analysis results show that the corrosion degree of 304 stainless steel is weakened first with latter strengthening by increasing the concentration of NaCl solution. The corrosion of NaCl solution contributes to the delay of cavitation erosion in a certain concentration, and the delaying effect is enhanced first with latter mitigating with the increasing of NaCl solution concentration. The minimum cavitation erosion is obtained at the concentration of NaCl solution of 35%. For the same corrosion time and cavitation erosion time, the plastic deformation is strengthened, and the thickness of twin layer of tested samples is gradually increased with the increasing of NaCl solution concentration, while the cumulative mass loss and the surface roughness are decreased first with latter increasing during the process. Compared to the sample undergoing cavitation erosion, the sample suffering from corrosion and cavitation erosion is featured by relatively slight cavitation erosion and smooth surface. Due to the cavitation erosion, the grains are preferentially oriented and refined.
DU J H, CHEN F J. Cavitation dynamics and flow aggressiveness in ultrasonic cavitation erosion[J]. International Journal of Mechanical Sciences, doi： 10.1016/j.ijmecsci.2021.106545.
LIU H X, CHEN J H, CHEN J, et al. Characteristics of waterjet cavitation erosion of 304 stainless steel after corrosion in NaCl solution[J]. Acta Metallurgica Sinica, 2020, 56（10）: 1377-1385. (in Chinese)
［3］
SELVAM K, MANDAL P, GREWAL H S, et al. Ultrasonic cavitation erosioncorrosion behavior of friction stir processed stainless steel[J]. Ultrasonics Sonochemistry, doi: 10.1016/j.ultsonch.2018.02.041.
WEI X, LIU H X, CHEN J, et al. Influences of mass fraction of NaCl solution and cavitation time on cavitation erosion of corroded aluminum bronzes[J].
The Chinese Journal of Nonferrous Metals, 2021, 31(2):499-509.(in Chinese)
［5］
PAOLANTONIO M, HANKE S. Damage mechanisms in cavitation erosion of nitrogencontaining austenitic steels in 35% NaCl solution[J]. Wear, doi：10.1016/j.wear.2020.203526.
［6］
SONG Q N, TONG Y, XU N, et al. Synergistic effect between cavitation erosion and corrosion for various copper alloys in sulphidecontaining 3.5% NaCl solutions[J]. Wear, doi：10.1016/j.wear.2020.203258.
［7］
GOU W J, ZHANG H, LI H P, et al. Effects of silica sand on synergistic erosion caused by cavitation, abrasion, and corrosion[J]. Wear, doi：10.1016/j.wear.2018.07.023.
［8］
WAN T, XIAO N, SHEN H J, et al. The effect of chloride ions on the corroded surface layer of 00Cr22Ni5Mo3N duplex stainless steel under cavitation[J]. Ultrasonics Sonochemistry, 2016, 33: 1-9.
［9］
CAO L F, QIN Z B, DENG Y D, et al. Effect of passive film on cavitation corrosion behavior of 316L stainless steel[J]. International Journal of Electrochemical Science, 2020, 15: 628-638.
[10]
GONZALEZSANCHEZ J, DZIBPEREZ L, TAMAYO J M, et al. Quantitative determination by SRET measurements of pit dissolution rate of AISI 304 stainless steel in natural sea water[J]. Corrosion Engineering Science and Technology, 2015, 50: 559-566.
CHEN J, LIU H X, LIU G L, et al. Ultrasonic cavitation erosion behavior of 304 stainless steel after corrosion in NaCl solution[J]. Journal of Central South University(Science and Technology), 2021, 52（5）: 1436-1445. (in Chinese)
[12]
石德珂. 材料科学基础[M]. 2版. 北京: 机械工业出版社, 2019: 328-332.
[13]
DENG S F, WANG S B, WANG L Y, et al. Influence of chloride on passive film chemistry of 304 stainless steel in sulphuric acid solution by glow discharge optical emission spectrometry analysis[J]. International Journal of Electrochemical Science, 2017, 12: 1106-1117.
[14]
ZHANG H, DU N, WANG S X, et al. Determination of iron valence states around pits and the influence of Fe3+ on the pitting corrosion of 304 stainless steel[J]. Materials, doi:10.3390/ma13030726.
[15]
ZHENG Z B, ZHENG Y G. Effects of surface treatments on the corrosion and erosioncorrosion of 304 stainless steel in 35% NaCl solution[J]. Corrosion Science, 2016, 112: 657-668.
